Study on. Business. Forum of Regulators (FOR) New Delhi

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1 Study on Capital Costs Benchmarks for Distribution ib ti Business Submitted to Forum of Regulators (FOR) New Delhi ADMINISTRATIVE STAFF COLLEGE OF INDIA CENTRE FOR INFRASTRUCTURE MANAGEMENT & REGULATORY STUDIES Bella Vista :: Hyderabad nd March 2010

2 C O N T E N T S Chapter Title Page 1. Introduction 1 2. Terms of Reference 2 3. Approach and Methodology 5 4. Identification of works, data collection and validation 11 1 Southern Power Distribution Company of Andhra Pradesh 15 Limited (APSPDCL) 2 Central Power Distribution Company of Andhra Pradesh 24 Limited (APCPDCL) 3 Tamil Nadu Electricity Board (TNEB) 32 4 Uttar Gujarat Vij Company Limited (UGVCL) 38 5 Madhya Gujarat Vij Company Limited (MGVCL) 42 6 Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company 45 Limited (MPPKVVCL), 7 Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company 50 Limited (MPMKVVCL), 8 Uttarkhand Power Company Limited (UPCL), Dehradun West Bengal State Electricity Distribution Company Limited 58 (WBSEDCL), Central Assam Electricity Distribution Company Limited (CAEDCL) Upper Assam Electricity Distribution Company Limited (UAEDCL), Southern Electricity Supply Company of Orissa Ltd. (SOUTHCO) Central Electricity Supply Utility of Orissa Limited (CESU) Punjab State Electricity Board (PSEB) BSES Rajadhani Power Limited (BRPL) North Delhi Power Limited (NDPL) Chhattisgarh State Power Distribution Company (CSPDCL) Maharastra State Electricity Distribution Company Limited Cost analysis and Cost Benchmarks Analysis of the Increase in Capital Costs and Correlation with 168 the Relevant Index of Industrial Production. 7. Summary, Conclusions, and Suggestions/Recommendations 203 i

3 L I S T O F T A B L E S 1. Southern Power Distribution Company of Andhra Pradesh Limited (APSPDCL) Table No. Title Page No. 4.1 Costs of 33 kv lines Costs of 11 kv Lines Cost of LT Lines Conversion Costs of HVDS Conversion Costs of HVDS, replacing different capacities of 19 existing Transformers 4.6 Costs at 33/11 kv substations (Outdoor) Cost of Distribution Transformers Stations Costs of Metering Sets and Meters Service Line Costs Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL) 4.10 Costs of 33 kv lines (Overhead) Costs of 33kV Underground Cable System Costs of 11 kv Overhead Lines Costs of 11kV Underground Cable Feeders Costs of LT Overhead Lines Costs of Underground Cable System Costs of 33/11 kv Substation (Outdoor) Break-up Costs for 33/11 kv Substations Cost of Substations (Indoor) Cost of Distribution Transformers Stations Costs of Metering Equipment and Meters Service Line Costs Tamil Nadu Electricity Board (TNEB) 4.22 Costs of 33 kv lines Cost of 33 kv Underground Cable System Costs of 11 kv Lines Costs of 11kV Underground Cable System Costs of LT overhead lines (Outdoor) Costs of LT Underground System Break-up costs of 33/11 kv substations with break up details Cost of Distribution Transformers Stations Costs of Metering Equipment and Meters Service Line Costs Uttar Gujarat Vij Company Limited (UGVCL) 4.32 Cost of 22kV and 11 kv Lines Costs of LT lines (Overhead) Costs of Distribution Transformer stations Cost of Metering Equipment Service Line costs 41 ii

4 5. Madhya Gujarat Vij Company Limited (MGVCL) 4.37 Costs of 11 kv Lines (Overhead) Costs of 11 kv Underground System Costs of LT Overhead lines Cost of Distribution Transformer Stations (Outdoor) Costs of Metering Equipment and Meters Service Line Costs Madhya Pradesh Paschima Kshetra Vidyuth Vitaran Company Limited (MPPKVVCL), Indore 4.43 Costs of 33 kv lines (Overhead) Cost of 11 kv lines (Overhead) Costs of LT Lines (Overhead) Conversion costs of HVDS Scheme Costs of HVDS (Conversion of LT to 11 kv line etc.) Break-up Costs of 33/11 kv substations Costs of 11 kv/0.4 kv DTR stations Metering Equipment and Meters Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited (MPMKVVCL), Bhopal 4.51 Costs of 33 kv Lines (Overhead) Cost of 11 kv Lines (Overhead) Costs of LT Lines (overhead) Cost of HVDS (Conversion of LT to 11 kv line etc.) Break-up Costs of 33/11 kv substations (Outdoor) Costs of Distribution transformer Stations (Outdoor) Uttarkhand Power Company Limited (UPCL) 4.57 Costs of 33kV line (Overhead) Costs of 11 kv Line Cost of 11 kv UG Cable System Costs of LT Lines Costs of LT AB Cable Lines Break-up costs of 33/11 KV Substations Costs of Distribution Transformer Stations (Outdoor) Cost of Metering equipment and Meters West Bengal State Electricity Distribution Company Limited (WBSEDCL) 4.65 Costs of 33kV lines Costs as per Turn Key Contracts Costs of 11kV lines kV line with 50Sq mm² ACSR Costs of LT lines LT 3Ph 4wire line with 25Sq mm² AAAC /11kV substation costs Costs break up of 33/11kV substation /11kV substation costs with 2X3.15 MVA transformers on turnkey contracts 65 iii

5 4.74 Costs of distribution transformer stations Costs of distribution transformer stations Costs of Metering equipment and meters Service Line Costs Central Assam Electricity Distribution Company Limited (CAEDCL) 11. Upper Assam Electricity Distribution Company Limited (UAEDCL) 4.78 Costs of 33kV line Costs of 11kV lines Costs of LT lines / 11kV substation costs Costs of distribution transformer stations Costs of metering sets and meters Service lines costs Southern Electricity Supply Company of Orissa Limited (SOUTHCO) 4.85 Costs of 33 kv lines (Overhead) Costs of 11 kv Overhead Lines Costs of LT Overhead Lines Costs of 33/11 kv Substation (Outdoor) Break-up Costs for 33/11 kv Substations Costs of Distribution Transformers Stations Cost of Metering Equipment and Meters Service Line Costs Central Electricity Supply Utility of Orissa (CESU) 4.93 Costs of 33 kv lines (Overhead) Costs of Underground Cable system Costs of 11 kv Overhead Lines Costs of LT Overhead Lines Costs of 33/11 kv Substation (Outdoor) Break-up Costs for 33/11 kv Substations Costs of Distribution Transformer Stations Cost of Metering Equipment and Meters Service Line Costs Punjab State Electricity Board (PSEB) Costs of 66 kv lines (Overhead) Cost of 11 kv Overhead Lines Cost of LT lines (Overhead) Costs of 66/11 kv Sub-Stations (Outdoor) Costs of Distribution Transformer Stations (Outdoor) Cost of Metering Equipment and Meters Service Line Costs BSES Rajadhani Power Limited (BRPL) Cost of 66 kv UG cable lines Cost of 33 kv UG cable line 95 iv

6 4.111 Cost of 11 kv lines (Overhead) Cost of 11 kv UG cable line Cost of LT Overhead Line Cost of LT UG Cable Line Cost of 66/11 kv and 33/11 kv Sub-Stations Costs of Distribution Transformer Stations Service Line Costs North Delhi Power Limited (NDPL) Cost of 66 kv UG Cable Line Cost of 33 kv UG Cable Line Cost of 11 kv Lines (Overhead) Cost of 11 kv UG Cable Line Cost of LT Overhead Line Cost of 66/11kV Substations Costs of Distribution Transformer Stations Costs of Metering sets and Meters Service Line Costs Chhattisgarh State Power Distribution Company Limited (CSPDCL) Costs of 33 kv Lines Costs of 11 kv Lines Costs of LT Lines Costs of 33/11 kv Sub-Stations Costs break-up of 33/11 kv Sub-Stations Costs of Distribution Transformer Stations Costs of Metering Equipment and Meters (A) Maharashtra State Electricity Distribution Company Limited Costs of 33 kv Lines Cost of 11 kv Lines Costs of LT Lines Cost of Laying 33 kv UG cable Lines Cost of Laying 11 kv UG cable Line Costs of 33/11 kv Sub-Stations Cost of Distribution Transformer Stations Costs of Metering Equipment and Meters 111 (B) Tata Power Company Limited Cost of 33/11 kv Sub-Station Cost of 33 kv under Ground Cable system Cost of 11 kv under Ground Cable system Cost of Distribution Transformer Stations Cost of Metering Equipment and Meters 112 v

7 (C) BEST Limited Cost of 33/11 kv Sub-Station Costs of 33 kv under Ground Cable system Costs of 11 kv under Ground Cable system Costs of Distribution Transformer Stations kv Line with different sizes of conductors, type of 116 supports and span lengths 5.2 Comparative costs of 33 kv over head line with different 117 conductor sizes, supports at different span lengths 5.1(a) Costs of 33kV under ground system kv Line with different sizes of conductors, type of supports 120 and span lengths 5.4 Comparative costs of 11 kv overhead line with different 122 conductor sizes, supports at different span lengths 5.4 Comparative costs of 11 kv overhead line with different 123 (Contd.) conductor sizes, supports at different span lengths 5.3 (a) Costs of 11 kv Underground System LT Line with different sizes of conductors, type of supports and 126 span lengths 5.6 Comparative costs of LT overhead line with different conductor 129 sizes, supports at different span lengths 5.6 Comparative costs of LT overhead line with different conductor 130 (contd.) sizes, supports at different span lengths 5.6 (a) Costs of LT Underground System /11kV and 33/11 kv Substations (Outdoor) Costs of 33/11 kv Substation (Outdoor) Costs of 33/11 kv Substation (Outdoor) 137 (contd.) /11 kv Substations (Indoor) Costs of 33/11 kv Substation (Indoor) Distribution Transformer Stations (Outdoor) Distribution Transformer stations (Outdoor) Conversion cost of HVDS Conversion costs of HVDS, replacing different capacities of 145 existing transformers 5.15 Cost of Metering Equipment and Meters Service Line costs Overhead costs adopted by various utilities Composite Price Index number Capital Costs / Km of 33 kv 171 Line with RCC / PSCC poles 6.2 Capital Costs of 33 kv line Estimated Benchmark Costs for vi

8 A N N E X U R E S Annexure Title Page 3.1 Details of State Electricity Boards and Utilities where the study is 9 conducted 3.2 Details of the Members of the Study team Standard Cost Estimate per km of 33 kv line with 100 Sq.mm 152 AAA Conductor Over 9.1 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 280 kgs at the rates ruling during Standard Cost Estimate per km of 11 kv line with 55 Sq.mm AAA 153 Conductor Over 8 Mts. PSCC Poles at 60 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during Standard Cost Estimate per km of LT 3- Ph 5 wire line 154 (Horizontal formation) 3x55 Sq.mm + 2 x34 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during Standard cost estimate for 100KVA distribution transformer 155 station at the rates ruling during (a) Detailed Estimate For Erection of 33/11 kv Sub-Station with 2 x MVA Power Transformers and NF = 4 Nos. 11 kv Feeders 5.5 (b) Typical layout of 33/11 kv substation with 2x5 MVA power 157 Transformers and with capacitor bank 5.6 (a) Standard cost estimate for domestic, non-domestic, single phase 158 service connection 5.6 (b) Standard cost estimate for three phase domestic, non-domestic 159 service connection 5.6 (c) Standard cost estimate for three phase industrial service upto HP 5.6 (d) Standard cost estimate for three phase industrial service above HP 5.6 (e) Standard cost estimate for street light service connection (f) Standard cost estimate for agricultural service connection (g) Standard arrangement for single phase service connection (h) Standard arrangement for three phase industrial service 165 connection with bare wires. 5.6 (i) Standard arrangement for three phase industrial service 166 connection with insulated wires. 5.6 (j) Standard arrangement for three phase agricultural service 167 connection 6.1 Composite Price Index numbers for different elements in 178 Distribution Business 6.2(a) Arriving at the caital cost ranges for the year vii

9 6.2(b) Arriving at the capital cost ranges for the year (c) Arriving at the capital cost ranges for the year (d) Arriving at the capital cost ranges for the year (e) Arriving at the capital cost ranges for the year (f) Year-wise Benchmark capital costs from to Model for arriving at Benchmark capital cost of different elements of distribution business correlating to Composite Price Index Numbers 202 viii

10 G L O S S A R Y APSPDCL : Southern Power Distribution Company of Andhra Pradesh Limited APCPDCL : Central Power Distribution Company of Andhra Pradesh Limited TNEB : Tamil Nadu Electricity Board MGVCL : Madhya Gujarat Vij Company Limited UGVCL : Uttar Gujarat Vij Company Limited MPMKVVCL : Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited MPPKVVCL : Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company Limited WBSEDCL : West Bengal State Electricity Distribution Company Limited CESU : Central Electricity Supply Utility of Orissa Limited SOUTHCO : Southern Electricity Supply Company of Orissa Limited PSEB : Punjab State Electricity Board NDPL : North Delhi Power Limited BRPL : BSES Rajadhani Power Limited UPCL : Uttarkhand Power Corporation Limited CAEDCL : Central Assam Electricity Distribution Company Limited UAEDCL : Upper Assam Electricity Distribution Company Limited CSPDCL : Chhattisgarh State Power Distribution Company Limited AAAC : All Aluminium Alloy Conductor ACSR : Aluminium Conductor Steel Reinforced PSCC : Pre stressed Cement Concrete RCC : Reinforced Cement Concrete HVDS : High Voltage Distribution System ix

11 1. Introduction 1.1 Background 1.1 The Tariff Policy issued by the Ministry of Power, Government of India on January 6, 2006, stipulates as follows: 5.0 General Approach to Tariff 5.3 Tariff Policy lays down following framework for performance based cost to service regulation in respect of aspects common to generation, transmission as well as distribution (a) Return on Investment while allowing the total capital cost of the project, the Appropriate commission would ensure that these are reasonable and to achieve this objective, requisite benchmarks on capital costs should be evolved by the Regulatory Commission. A Working Group of FOR Members was formed in June 2008, on MYT Framework for Distribution Business and Distribution Margin. The Working Group had decided that a study should be conducted to evolve benchmarks for capital costs in distribution business, since capital costs would be the basis of cost plus tariff and prudent check of the capital expenditure incurred by the distribution licensee is essential. Such a benchmarking exercise would facilitate the capital expenditure approach process being undertaken by the State Electricity Regulatory Commissions (SERCs) as well as to ensure that only reasonable capital costs are allowed to be considered for the purpose of approval of ARR and determination of tariff. It is in this background that the Forum of Regulators (FOR) intended to get a study conducted for Capital Cost Benchmarks for Distribution Business across different States in the country. The study was entrusted to Administrative Staff College of India (ASCI), Hyderabad. 1

12 2. Terms of Reference 2.1 Objective of the Study To develop benchmarks for capital costs of key elements of the distribution business, by analysing the data from various power utilities in all the five regions in the country with clear distinction between capital costs incurred in Rural Distribution Network. Urban Distribution Network Overhead system Underground system To develop the capital cost benchmarks, the following key components of the distribution provide guiding principles for approval of capital cost of distribution business. Distribution feeder lines 33 kv, 22 kv, 11 kv overhead and underground. Receiving sub-stations (Indoor and Outdoor type) with 3.15 MVA, 5 MVA, 16 MVA, 20 MVA etc power transformers including civil works, switchgear, lightening arrestors, capacitors banks etc. 66 kv is also considered under distribution in the case of Delhi where Distribution Utilities manage 66 kv. In the case of Punjab, the SEB is an integrated utility and does not have 33 kv voltage. Hence 66 kv is also considered as distribution voltage. There is no 33 kv network under distribution in Gujarat and the substations are 66/11 kv, which are under transmission utility s control. The DISCOMs have only 11 kv and LT network. 2

13 Distribution transformer stations (Indoor and Outdoor) including that of use of Amorphous core distribution transformers with 25 kva, 63 kva, 100 kva, 200/250 kva, 315 kva, 500 kva, 1000 kva, 2000 kva etc. Implication of BEE Energy Efficiency star rating should also be considered. Metering equipment including meters of all types CT, PT sets etc. LT network (overhead) including poles, conductor and other accessories such as insulators, clamps, connectors etc. LT network (underground) including cable, LT feeder pillars / mini pillars etc. Service lines. To identify cost escalation factors that would impact the capital cost of distribution system components. To develop a system for updating the benchmarks for capital cost on year to year basis with minimum requirement of additional data. To suggest norms for other cost overheads such as labour charges, transportation, supervision, contingencies etc., which are normally considered while determining capital cost. 2.2 Scope of Work The scope of work for the study includes Developing benchmarks and appropriate escalation indices for capital costs of key elements of distribution network based on the study and analysis of the following aspects: Creation of database of actual capital costs in distribution business by compiling data of different State Electricity Boards, Government owned Corporations / Companies, private sector licensees such that data is captured for at least ten different states in the country. The capital cost data has to be recent i.e. as incurred in the last two years. Analysis of the above data base for determination of benchmark capital cost for main items of capital expenditure in distribution business with clear distinction between capital costs incurred in - - Overhead systems - Underground systems - Rural distribution networks - Urban distribution networks 3

14 The cost of erection, testing, commissioning and other incidental expenses including site preparation, site supervision etc., shall be factored into the capital cost of key components of the distribution business. Study of typical gestation period for distribution system capital expenditure and share of interest during construction in completed capital cost in the distribution business. Suggest as to whether there is a need for state specific adjustments in the above determined benchmarks capital costs? Identification of the specific needs of capital expenditure that could require adjustments to meet specific requirements. Analysis of the increase in capital cost over the last five-years and correlation with the index in engineering goods and any other relevant index of industrial production. Design of a cost indexation formula that can be validated using data of previous years and incorporated in the model. Creation of a model for self-validation of the capital cost benchmarks, so that the benchmarks are automatically revised as data of new projects gets added to the database. 4

15 3. Approach and Methodology 3.1 This chapter details out the methodology that ASCI adapted to carryout the terms of reference of the assignment and the scope of work. 3.2 Identification of States / Utilities for the Study As per the scope of work the data for the study has to be captured for at least ten (10) states. The states and the utilities in each of the States have been identified in consultation with FOR Secretariat. The study covers two States in Southern Region, two in Western Region, three in Northern Region, two in Eastern Region and one in North Eastern Region. Wherever the State Electricity Boards have been restructured two of the restructured entities (Distribution Companies) have been identified. The data for the study is captured from two State Electricity Boards and fourteen Distribution Companies in eight States of which ten are State owned and four are private utilities. The details of State Electricity Boards and utilities where the study is conducted are given in Annexure Methodology The study required extensive data collection on various components of Distribution business as listed under terms of reference / scope of works which includes: Costs of various components in Distribution business. Evaluation of data. Benchmarking costs of various components of distribution system. Data on procurement costs etc., of various equipment / material to arrive at price escalation. Data on price indices. Design of cost indexation formula. Creation of a model for self validation of the cost benchmarks etc. 5

16 3.4 Collection of Data The first step in carrying out the study is data collection from the identified sixteen utilities. As mentioned earlier the study required collection of extensive data on various components etc., of Distribution Business from various State Electricity Boards and Utilities listed in Annexure-3.1 ASCI, the consultant have developed a number of formats for collection of data required to benchmark the capital costs of various components of Distribution Business and other requirements under the study and furnished to FOR Secretariat on 5 th February 2009 for due verification and to communicate to utilities to make the data available as required in the formats. The FOR Secretariat has communicated the formats to the Secretaries, State Electricity Regulatory Commissions and the Utilities to make the data available to ASCI for the study vide letter No.15/2(7)/2008- FOR/Study/CC dated 16 th February The data requirements as detailed in the formats include: Cost of procurement of various equipment / material over the last 5 years ( to ). Cost of 33/11 kv sub-stations (indoor and outdoor type) over the last two years with power transformers of different capacities as executed. Cost per km of 33 kv overhead line and underground cable as executed. Cost per km of 11 kv overhead line and underground cable as executed. Cost of erection of Distribution transformers with different capacities indoor and outdoor as executed. Cost per km of LT overhead lines and underground cable. It is considered that further data / information required could be collected during the visits of ASCI Consultants to various utilities. 3.5 Process Analysis The costs obtained for elements of Distribution Business are analysed and observed that the utilities prepared cost data for various works and updated it on yearly basis based on input costs or increase by certain percentage. The cost data prepared is used for preparation of estimates and award of contracts, particularly turnkey / partially turnkey contracts. 6

17 But the costs as executed are not available in complete shape in a number of utilities. In most of the cases, the completion costs are not finalised. Even in the case of works where accounts are finalised, the costs of some items are missing. In some cases, particularly in substation costs, released transformer from some other station is installed and the cost of released transformer is taken, this completion cost cannot be considered for benchmarking. In some cases a work order was issued for a scheme, which includes 33 / 11 kv substation, connected 33 kv line and 11 kv lines where the cost of substation has to be segregated. In some cases the cost of overheads is not added to completion cost. As such the so-called cost as executed obtained / collected could not be considered as costs as executed. The consultants have validated the data by adding the cost of missing items and updating the costs in some cases. This had to be done in quite a number of cases to have a fairly realistic cost and it took considerable time. ASCI consultants had to visit the utilities and sit with the concerned officers and obtain / collect data and even then complete data is not available. The consultants have visited the utilities twice. Apart from these visits, ASCI had closely followed up with the distribution companies and obtained the data. Though Chhattisgarh and Maharashtra are not included in the identified states, the Chhattisgarh State Electricity Regulatory Commission and Maharashtra Electricity Regulatory Commission have obtained and furnished some data from the distribution utilities in the respective State. This data is also considered in the study. 3.6 Study Team ASCI has organised a team of Senior Engineers who are conversant with Distribution Management to visit utilities in various States to discuss with the concerned engineers in the utilities and collect the data and analyse. The team visited the utilities in all the States listed for this study. The details of the members of the study team are given in Annexure-3.2 The core team in ASCI has analysed the data collected, validated / evaluated to arrive at benchmark costs and draft the report. 7

18 3.7 Final Report Based on the data obtained / collected from the utilities, a draft report is prepared and a presentation was made to the Forum Secretariat on 18 th September Certain suggestions were made during the presentation, which were incorporated and a draft final report was submitted on 19 th October A presentation was made on the draft final report to the Forum of Regulators at Lucknow on 1 st February The final report is finalised based on the comments and suggestions made during this meeting. The Report covers the study on Capital Cost Benchmarks for Distribution Business as detailed below: 1. Introduction 2. Terms of Reference 3. Approach and Methodology 4. Identification of Works, Data collection and Validation 5. Cost Analysis and Cost Benchmarks 6. Analysis of the Increase in Capital Costs and Correlation with the Relevant Index of Industrial Production 7. Summary, Conclusion and Recommendations 8

19 Annexure-3. 1 Details of State Electricity Boards and Utilities where the Study is conducted S.N Name of the State Electricity Board / Utilities Region 1. Central Power Distribution Company of Andhra Pradesh Limited Southern (APCPDCL), Hyderabad. 2. Southern Power Distribution Company of Andhra Pradesh Southern Limited (APSPDCL), Tirupati. 3. Tamil Nadu State Electricity Board (TNEB), Chennai. Southern 4. Madhya Gujarat Vij Company Limited, (MGVCL), Vadodara, Western Gujarat 5. Uttar Gujarat Vij Company Limited, (UGVCL), Mehsana, Gujarat Western 6. Madhya Pradesh Paschim Kshetra Vidyut Vitaran Company Western Limited, (MPPKVVCL), Indore, Madhya Pradesh. 7. Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company Western Limited, (MKVVCL), Bhopal, Madhya Pradesh. 8. West Bengal State Electricity Distribution Company Limited, Eastern (WBSEDCL), Kolkata. 9. Central Electricity Supply Utility, (CESU), Bhubaneswar, Orissa. Eastern 10. South Electricity Supply Company, (SOUTHCO), Behrampur, Eastern Orissa. 11. Punjab State Electricity Board (PSEB), Patiala. Northern 12. North Delhi Power Limited (NDPL), New Delhi. Northern 13. BSES Rajdhani Power Limited (BRPL), New Delhi. Northern 14. Uttarakhand State Electricity Distribution Company Ltd. Northern (USEDCL), Dehradun 15. Central Assam Electricity Distribution Company Limited, North (CAEDCL), Guwahati. Eastern 16. Upper Assam Electricity Distribution Company Limited, North (UAEDCL), Guwahati. Eastern 9

20 Annexure-3.2 Details of the members of the study team S.N Name of the Members Position 1. K Balarama Reddi Team Leader 2. Dr. Usha Ramachandra Team Member 3. T. Ramalinga Reddy Team Member 4. P Subbarami Reddy Team Member 5. J V S N Murthy Team Member 6. K. Bhaskara Reddy Team Member 7. Y Satyanarayana Team Member 8. M Sivarami Reddy Team Member 9. G Subba Raju Team Member 10. P. Raja Rajeswar Team Member The team members except Dr. Usha Ramachandra had worked earlier in Andhra Pradesh power sector in different capacities in Distribution Management. Dr Usha Ramachandra is Senior Faculty of ASCI. 10

21 4. Identification of Works, Data Collection and Validation 4.1 Identification of Works As per the terms of reference, the costs of certain elements in the Distribution Business have to be benchmarked. The elements for which cost benchmarks have to be developed in the Distribution Business are as under: (i) (ii) (iii) Distribution feeder lines: 33 kv, 22 kv and 11 kv Overhead and Underground. 66 kv-overhead and underground, where 66 kv system is managed by the distribution utilities. Receiving Stations (substations) 33 kv and 66 kv (Outdoor and Indoor) with transformer capacities of 1.6 MVA, 3.15 MVA, 5 MVA, 8 MVA, 10 MVA, 16 MVA, 20 MVA etc., including civil works, switch gear, lightening arrestors, capacitor banks etc. Distribution Transformer Substations (Indoor and Outdoor) With transformer capacities of 25 kva, 63 kva, 100 kva, 200 kva, 315 kva 500 kva 1000 kva, 1600 kva and 2000 kva etc. The transformers may include Amorphous core distribution transformers and BEE energy efficiency star rating transformers. (iv) Metering equipment, including meters of all types CT, PT sets etc. (v) LT Network (underground) including cable, LT feeder pillars / mini pillars etc. (vi) LT Network (overhead) including poles, conductor and other accessories, such as insulators, clamps, connectors etc. (vii) Service Lines. The capital cost to have clear distinction between Urban and Rural distribution network. 4.2 Data Collection Collection of data from all the sixteen utilities (Electricity Boards and Distribution Companies) is a major task in the study to Benchmark the costs of various elements in the Distribution Business listed in para 4.1 above. 11

22 4.2.1 Data Formats ASCI had developed formats for the collection of data required in line with the objectives of the study and scope of work. The formats have been designed to capture data for a five year period ( to ), wherever available the data is collected for also. The data to be collected includes: Procurement cost of all major equipment / materials required for distribution business. Cost of 66/11 kv or 33 / 11 kv substations (Receiving Stations) Specifying the number and capacity of power transformers and 11 kv outgoing feeders (outdoor and indoor type). Cost of 66 kv/33 kv line/km indicating size of conductors, type of supports used. Cost of 33 kv feeder with underground cable / km. Cost of 11 kv line / Km indicating the size of conductors and the supports used for the line. Cost of 11 kv feeder with underground (UG) cable / Km indicating the size of the cable used. Cost of installation of Distribution transformer stations with different capacities of distribution transformers including the cost of transformer structure, isolators, LAS, cabling etc. Cost of LT line / km indicating size of conductors and type of supports. Cost of LT UG cable feeder / km indicating the size of the cable used. Cost of metering equipment, meters etc. Cost of service line. As indicated in the scope of work, the capital cost data of the years and ( where available) is utilised to benchmark the capital costs. The costs for a five year period is utilised to arrive at the increase in capital cost to correlate with the index for engineering goods / industrial products. Formats have been communicated to all the utilities, respective State Electricity Regulatory Commissions and ASCI by the FOR Secretariat with a request to furnish the data as required in the formats. The response was not that encouraging, ASCI consultants have visited all the utilities once or twice to explain to the concerned the 12

23 purpose of the data etc., and sat with the concerned Engineers, assisted them in filling the formats and collected the data to the extent available and the utilities have furnished balance data subsequently. The data could be obtained to a large extent from the utilities by visits of ASCI consultants and close follow up as given below: (i) Southern Power Distribution Company of Andhra Pradesh Limited (APSPDCL) Tirupati. (ii) Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL), Hyderabad. (iii) Tamil Nadu Electricity Board (TNEB), Chennai. (iv) Madhya Gujarat Viz Company Limited (MGVCL), Vadodara. (v) Uttar Gujarat Viz Company Limited (UGVCL), Mehsana. (vi) Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company Limited (MPPKVVCL), Indore. (vii) Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company Limited (MPMKVVCL), Bhopal. (viii) West Bengal State Electricity Distribution Company Limited (WBSEDCL), Kolkata. (ix) Uttarkhand Power Company Limited (UPCL), Dehradun. (x) Central Assam Electricity Distribution Company Limited (CAEDCL), Guwahati. (xi) Upper Assam Electricity Distribution Company Limited (UAEDCL), Guwahati. (xii) Central Electricity Supply Utility of Orissa (CESU), Bhubanewsar. (xiii) Southern Electricity Supply Company of Orissa Limited (SOUTHCO), Behrampur. (xiv) Punjab State Electricity Board, Patiala. (xv) North Delhi Power Limited (NDPL), New Delhi. (xvi) Brihan Mumbai Subarban Electricity Supply Rajdhani Power Limited, New Delhi (xvii) *Chhattisgarh State Distribution Company Limited. (xviii) *Maharashtra utilities. *The data from the utilities are obtained and furnished by the respective Regulatory Commission. 13

24 4.2.2 The Data Collected from various utilities is briefly discussed below: Wherever consolidated data on the completion cost of a line or substation is not available, ASCI obtained the issue rate of each equipment / material during the year for a line / substation and worked out the cost of a line / km or substation etc. Wherever actual costs are not available for all items, the costs of missing items are added either from issue rates from stores or from cost estimates. In some cases, utilities have not taken into account the erection, establishment, transport, contingencies charges etc. In such cases these costs are added. The data obtained / collected is validated to arrive at completed cost. The data obtained / validated from each utility is discussed in this Chapter. 14

25 1. Southern Power Distribution Company of Andhra Pradesh Limited (APSPDCL) The utility prepares cost data / cost estimates for various works substations, distribution transformer stations, overhead lines etc., every year. The cost data is updated yearly based on the equipment / material costs procured duly adding the labour, transport and other establishment charges. The cost data is taken as a basis for preparation of estimates for various works for award of contracts. Works are normally executed within the estimated costs. The works funded by the external agencies like JBIC etc., are awarded for execution on turnkey basis. Wherever works are awarded on a turnkey basis for substations, HVDS etc., the bidders are given the estimate prepared based on the cost data and are required to quote as a percentage of the total estimated cost. The lowest quotations are usually at the estimated cost in about half of the cases and in others they are about 1 to 5 percent less or more. Generally the lowest quotations do not exceed the estimated costs. There is not much difference between the estimated costs, and the costs as executed, and the executed costs differ from work to work and place to place; based on the terrain etc. For the works funded by other agencies, such as, REC etc., the works are awarded on partial turnkey basis, wherein, major equipment, conductor, etc., are supplied by the utility and the contractor procures other materials according to specification and executes the works. The cost estimates, prepared by them on the latest cost data and works as executed on partial turnkey basis, are verified and found that the completion costs vary by about + 1 to 10% over the estimated costs. This is mainly due to variance in procurement costs of some equipment compared to estimate costs, and due to terrain and other local factors where the material utilised is either more or less than the estimated quantities. The costs as obtained / validated for each element of distribution business is discussed below: 15

26 (i) 33 kv, 11 kv and LT Lines: The utility manages only 33 kv, 11 kv and LT network. The construction of the lines is generally awarded as partial turnkey contracts with the utility supplying all major material such as conductor, poles etc. (a) 33 kv Lines: The utility has standardised the construction of 33 kv line with 100 mm 2 AAAC on 9.1 meter PSCC poles with 105 meter span in rural areas and 80 meter span in urban areas. The cost per km of line as obtained / validated are given in Table-4.1 below: Table-4.1 Costs of 33 kv lines (Rs. Lakh/km) Costs obtained / validated Sl. No. Item mm 2 AAAC with 105 meters span mm 2 AAAC with 80 meters span (b) 11 kv Lines: The utility adopted the following norms for construction of 11 kv lines: 11 kv line with (i) 55 mm 2 AAAC on 8.0 meter PSCC supports with 60 meter and 65 meter spans and (ii) with 34 mm 2 AAAC on 8.0 meter PSCC supports with 60 meter and 65 meter spans. The line with 65 meter span is most common. The costs as obtained/ validated are given in Table-4.2 below: Table-4.2 Costs of 11 kv Lines (Rs. Lakhs/ km) Sl. Data as obtained/ validated Item No mm 2 AAAC with 65 meter span mm 2 AAAC with 60 meter span mm 2 AAAC with 65 meter span mm 2 AAAC with 60 meter span kv line with 60 meter span is erected in urban areas and 65 meter span in rural areas. The conductor size is adopted based on load to be catered. 16

27 (c) LT System: The utility adopts the following norms for construction of LT lines. (i) LT 3 phase 5 wire line with 3x55mm 2 + 2x34 mm 2 AAAC on 8.0 meter, PSCC poles with 60 meter and 65 meter spans. (ii) LT 3 phase 5 wire line with 5x34 mm 2 AAAC on 8.0 meter, PSCC poles with 60 meter and 65 meter spans. (iii) 3 phase 4 wire line with 3x55 mm 2 AAAC + 1x34 mm 2 AAAC over 8.0 meter, PSCC poles with 60 meter and 65 meter spans (iv) 3 phase 4 wire line with 4x34 mm 2 AAAC over 8.0 meter, PSCC poles with 60 meter and 65 meter spans. (v) Single phase 3 wire line with 3x34 mm 2 AAAC over 8.0 meter, PSCC poles with 60 meter and 65 meter spans. (vi) Single phase 2 wire line with 2x34 mm 2 AAAC over 8.0 meter, PSCC poles with 60 meter and 65 meter spans. The usage of the above LT lines is as below: (i) (ii) 3 phase 5 wire with 55 mm 2 AAAC conductor 3 phase 5 wire with 34 mm 2 AAAC conductor Urban areas for 3 phase supply (4 wires) and for street light supply. Rural areas for 3 phase supply (4 wires) and for street light supply. (iii) 3 phase 4 wire with 3x55 mm mm 2 AAAC conductor For supply to Agricultural pump sets and other 3 phase loads. (iv) (v) 3 phase 4 wire with 4x34 mm 2 AAAC conductor LT single phase 3 wire line with 34mm 2 For agricultural pumpsets and other 3 phase loads. For single phase supply for residential and commercial loads with street light supply (vi) LT single phase 2 wire line with 34 mm 2 For single phase supply for residential / commercial loads. The costs of above LT lines as obtained are given in Table-4.3 below: 17

28 Sl. No. Table-4.3 Cost of LT Lines Details Costs as obtained / validated (Rs. lakhs) LT 3 phase 5 W line with 3x55 mm 2 + 2x34 mm 2 AAAC on 8 meter, PSCC poles with 65 meter span LT 3 phase 5 W line with 3x55 mm 2 + 2x34 mm 2 AAAC on 8 meter, PSCC poles with 60 meter span LT 3 phase 5 W line with 5x34 mm 2 AAAC on 8 meter, PSCC poles with 65 M, span LT 3 phase 5 W line with 5x34 mm 2 AAAC on 8 meter, PSCC poles with 60 M, span LT 3 phase 4 W line with 3x55 mm 2 + 1x34 mm 2 AAAC on 8 meter PSCC poles with 65 meter span LT 3 phase 4 W line with 3x55 mm 2 + 1x34 mm 2 AAAC on 8 meter, PSCC poles with 60 meter span LT 3 phase 4 W line with 4x34 mm 2 AAAC on 8 meter, PSCC poles with 65 meter span 8 LT 3 phase 4 W line with 4x34 mm 2 AAAC on 8 meter, PSCC poles with 60 meter span 9 LT Single phase 3 W line with 34 mm 2 AAAC on 8 meter, PSCC poles with 65 meter span 10 LT Single phase 2 W line with 34 mm 2 AAAC on 8 meter, PSCC poles with 60 meter span The benchmark costs for the overhead lines at various voltages are discussed in chapter-5 after examining the practices / norms adopted in other utilities. The utility has no underground (UG) cable system of any voltage in its area of operation. (ii) High Voltage Distribution System (HVDS) In APSPDCL, System Improvement Project (SIP) works for conversion of existing LT network into high voltage distribution system are taken up in large scale. This conversion of LT network is mostly done in rural areas, feeding agricultural loads. The costs for these projects, during and , which were awarded on turnkey basis, are given in Table-4.4 below: 18

29 Table-4.4 Conversion Costs of HVDS Sl.No. Details Cost per unit (Rs.) 1. Conversion of LT line into 11 kv (HVDS) line (per km) 29, Supply and erection of 16kVA copper wound distribution 70, transformer, with all the accessories (each) 3. Supply and erection of 25 kva copper wound distribution 88, transformers, with all the accessories (each) 4. Supply and erection of LT AB cable (3x16+25 mm 2 ) (Per 49, km.) 5. Replacing the existing 50/63/100 kva transformers and handing over to District Stores. 1, The cost of the removed 50/63/100 kva transformers are separately valued. The conversion costs of LT line to 11 kv and replacement of existing 100 kva, 63 kva and 50 kva transformers with 16 kva and 25 kva transformers within the feeding area of 100 kva transformers, 63 kva and 50 kva transformers are given in Table-4.5 below: The costs are net on giving credit to the existing 100 kva, 63 kva and 50 kva transformers. Table-4.5 Conversion Costs of HVDS, replacing different capacities of existing Transformers (Rs. in lakhs) Costs obtained/ Sl. validated Details No and Conversion cost of LT line to 11 kv and replacement of kva Transformer with required number of 25 kva transformers. 2 Conversion cost of LT line to 11 kv and replacement of kva Transformer with required number of 25 kva transformers. 3 Conversion cost of LT line to 11 kv and replacement of kva Transformer with required number of 25 kva transformers. 4 Conversion cost of LT line to 11 kv and replacement of kva Transformer with required number of 16 kva transformers. 5 Conversion cost of LT line to 11 kv and replacement of kva Transformer with required number of 16 kva transformers. 6 Conversion cost of LT line to 11 kv and replacement of 50 kva Transformer with required number of 16 kva transformers

30 (iii) 33/11 kv Receiving Stations (Substations) The utility has a large rural network supplying power to a large number of agricultural pump sets and rural households. A number of substations are being constructed in rural areas and few in urban areas. The utility has standardised the substation layouts with the following transformer capacities and 11 kv outgoing feeders. (i) 1x5 MVA 33/11 kv transformer with 3 numbers out going 11 kv feeders. (ii) 1x5 MVA 33/11 kv transformer with 2 numbers outgoing 11 kv feeders. (iii) 1x5 MVA 33/11 kv transformers with 4 numbers outgoing 11 kv feeders. The capacitor banks are not installed in all substations; they are being installed wherever required. The costs for substation furnished are without capacitor bank. The cost of substation with capacitor bank is also worked out. The 11 kv capacitor bank (2 MVAR) with breaker etc., is costing about Rs.8.77 lakhs/unit and this cost is added where substation cost is shown without capacitor bank. While benchmarking costs of the 33/11 kv substations with 1x5 MVA transformer with 3 numbers outgoing feeders, a capacitor bank is considered. This is discussed in Chapter-5. The utility does not provide 33 kv breaker (s) on the 33 kv side of the transformers either it is with 1x5 MVA transformer or 2x5 MVA transformers. The substations are erected with 9.1 meter PSCC poles and a small control room (12 ft. x18 ft.) is provided. Since the utility constructs a large number of 33/11 kv substations mostly in rural areas, the layouts are simple and all are outdoor substations. The same layout is adopted in urban and rural areas. The utility has not constructed any indoor substations. As mentioned earlier the substations are awarded mostly on turnkey basis and also on partial turnkey basis in some cases and the costs indicated are completed costs. Substation Costs (Outdoor) Only outdoor substations are constructed by the utility. The costs for 33/11 kv substations as obtained from the utility and validated with the break-up costs of (i) Land (ii) civil works (iii) equipment and material costs and 20

31 (iv) over heads are as under for 33/11 kv substations with 1x5 MVA transformer with 2,3 and 4 numbers of 11 kv feeders with and without capacitor bank are given in Table-4.6 below: Table-4.6 Costs at 33/11 kv substations (Outdoor) (Rs. In lakhs) Sl. Details Costs as obtained / validated No /11 kv substation with 1x5MVA transformers and 3 out going 11 kv feeders (a) Land - - (b) civil works (c) Equipment and material (d) Contingencies, labour and establishment charges Total including civil works (e) Capacitor Bank (2.0 MVAR) with associated accessories Total including capacitor bank /11 kv substation with 1x 5MVA transformers and 2 out going 11 kv feeders (a) Land - - (b) civil works (c) Electrical works material and equipment (d) Contingencies, labour and establishment charges etc. Total including civil works (e) 11 kv capacitor bank (2.0 MVAR) Total including capacitor bank (3) 33/11 kv substation with 1x 5 MVA transformers and 4 out going 11 kv feeders (a) Land - - (b) civil works (c) Electrical works equipment and material (d) Contingencies, labour and establishment charges Total cost including civil works (e) 11 kv capacitor bank (2.0 MVAR) Total including capacitor bank As mentioned earlier the utility has simplified the layouts with minimum land requirement etc. The land is obtained either free, donated by the consumers of the area, or paying nominal cost preferably for Government land. Staff quarters are not constructed at 33 kv substations. Control room is of 18 ft. x 12 ft. area. No compound wall is constructed and only fencing is provided. The substation occupies an area of about 2000 sq. meters or half an acre. 21

32 (iv) Distribution Transformer Stations The utility installs distribution transformers of capacities of 15 kva single phase and 25 kva, 63 kva and 100 kva three-phase. It does not install more than 100 kva capacities even in urban areas. The utility procures both CRGO core and amorphous core transformers. The transformer is installed mostly on a single pole structure with AB switch etc., the cost includes the structure, cabling etc. The cost of distribution transformer stations with different capacity transformers including structure etc., as obtained are given in Table-4.7 below: Table-4.7 Cost of Distribution Transformer Stations (Rs. In lakhs / each) Costs obtained / validated Sl.No. Details Single phase 15 kva of Amorphous core transformers 2 Single phase 15 kva oil immersed transformers 4 63 kva CSP transformer kva Amorphous core transformer kva CSP transformer kva Amorphous core transformer No 25 kva transformers are erected during the last 2 years. The utility is not procuring BEE energy efficiency star rating transformers. The Benchmark costs of the distribution transformer stations of various capacities along with costs obtained from other utilities are discussed in chapter-5. (v) Metering Equipment The costs of metering sets and meters as installed for different categories of consumers as obtained from APSPDCL are given below. The utility installs only static meters of different capacities for LT consumers and Trivector meters for HT consumers. The costs are given in Table-4.8 below: Table-4.8 Costs of Metering Sets and Meters (Rs. each) Sl. Details Costs as obtained/validated No kv CT set kv PT set kv CT/PT set Trivector meters LT 3phase meter LT Single phase meter

33 The cost of metering for 33 kv and 11 kv consumers is the cost of metering sets plus trivector meters. The benchmark costs would be discussed in Chapter-5 on comparing the costs in other utilities. (vi) Service Line Costs The service line costs are standardised for single-phase installations upto 250 watt load and for other services the costs are estimated. The estimated costs are generally worked out. The service line costs for industrial and commercial services and HT consumers are worked out in individual cases based on the actual input material costs. In addition, the utility collects development costs from consumers. The costs as obtained / validated are given in Table-4.9 below: Table-4.9 Service Line Costs (in Rupees) Sl.No. Details Cost data for Agricultural service erected on support. 2. Service connection of domestic and non-domestic (single phase) with electronic meter 3. Service connection of domestic and non-domestic (single phase) with high quality meter 4. Service connection of domestic non-domestic ( phase) static meter 5. Service connection of domestic non-domestic ( phase) with high quality meter 6. Service connection for industrial service (upto HP) with electronic meter 7. Service connection of industrial service (upto HP) with high quality meter 8. Service connection of 3 phase industrial service (above 15 HP) with CT meter 9. Street light service connection Erection of LT electronic trivector meters on LV side of DTR The benchmark costs are discussed in chapter-5 on comparing the costs in other utilities. 23

34 2. Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL) As discussed under APSPDCL (P) the distribution companies in Andhra Pradesh manage 33 kv, 11 kv and LT systems under distribution. The utility prepares cost data / cost estimates for various elements in distribution business 33/11 kv substations, distribution transformer stations, 33 kv, 11 kv and LT lines etc., and updates the data yearly based on input costs. This cost data is adopted for preparation of estimates for works and award of contracts either on turnkey basis or partial turnkey basis. It is found generally that the executed costs are well within the estimated costs as per cost data the variation is about + 5%. The costs of various elements in distribution business are discussed below: (i) 33 kv, 11 kv and LT lines (overhead) The construction of lines is generally awarded on partial turnkey basis with major material supplied by the utility and the erection by the contractor along with supply of minor materials. (a) 33 kv lines (overhead) The utility has standardised the construction of 33 kv line with 100 mm 2 AAAC conductor on 9.1 meter PSCC poles with 105, 80 and 65 meter spans in rural areas. In urban areas the lines with 65 meter span length over 9.1 meter PSCC poles is generally adopted. Standard cost data are also available with 50 meter and 60 meter spans over 12 meter RS Joists and 11 meter PSCC poles for adoption in the cities where the clearances with 9.1 meter poles may not be adequate. The cost per km of line as obtained / validated from the utility are given in Table-4.10 below: 24

35 Sl.No. Table-4.10 Costs of 33 kv lines (Overhead) (Rs. In lakhs/km) Costs obtained / validated Details kv line with 100 mm 2 AAAC over 9.1 meter PSCC poles with 105 meter span 2 33 kv line with 100 mm 2 AAAC over 9.1 meter PSCC poles with 80 meter span 3 33 kv line with 100 mm 2 AAAC over 9.1 meter PSCC poles with 65 meter span (b) 33 kv Underground System 33 kv underground cable system is executed in Hyderabad city, wherever the laying of overhead lines is not possible. The size of the cable standardised is 3x400 mm 2 XLPE cable. The cost of underground cable system as obtained from the utility are given in Table below: Table-4.11 Costs of 33 kv Underground Cable System (Rs. In lakhs/km) Sl.No. Details Costs obtained/validated i) 33 kv underground cable line with x400 mm 2 XLPE ii) Road Restoration charges Total The major items that influence the cost are the rate per km. of the cable, the type of soil etc. The road restoration charges which are substantial (about Rs. 10lakhs /KM). (c) 11 kv Overhead Lines The utility adopts the following norms for construction of 11 kv lines: 11 kv lines are constructed with 34 mm 2 and 55 mm 2 AAAC on 9.1 and 8.0 meter supports with 60 and 65 meter spans. The line with 65 meter span is most common. In city 11 kv lines over 11 meter spun poles / RS joists with 55 mm 2 AAAC having 50 meter span are also adopted. The costs of 11 kv overhead lines as obtained / validated are given in Table-4.12 below: 25

36 Table-4.12 Costs of 11 kv Overhead Lines (Rs. In lakhs/km) Sl. Details Costs obtained / validated No kv line with 55 mm 2 AAAC with 60 meter span over 8 meter PSCC poles kv line with 55 mm 2 AAAC with 60 meter span over 9.1 meter PSCC poles 3 11 kv line with 34 mm 2 AAAC with 60 meter span over 8 meter PSCC poles kv line with 34 mm 2 AAAC with 60 meter span over 9.1 meter PSCC poles 5 11 kv line with 55 mm 2 AAAC with 50 meter span over 11 meter RS Joists. In the case of item 5 the relatively high cost is due to 11 meter RSJs and reduced span length. (d) 11 kv Underground System The utility is providing underground cable system, wherever required in the cities. The costs of 11 kv underground system as obtained from the utility are given in Table-4.13 below: Table-4.13 Costs of 11 kv Underground Cable Feeders (Rs. In lakhs/km) Sl. Costs obtained / validated Details No i) Laying of 11 kv 3x 185 mm ii) Road cutting and Restoration charges Total i) Laying of 11 kv 3x 300 mm ii) Road Restoration charges Total x 185 mm 2 and 3 x 300 mm 2 XLPE cables are the two standard sizes used for the 11 kv underground cable system by the utility. (e) LT Overhead Lines The utility adopts the following norms for construction of LT lines. (i) LT 3 phase 5 wire line with 3x55 mm 2 + 2x34 mm 2 AAAC on 8.0 meter PSCC poles with 45 meter and 65 meter spans. (ii) LT 3 phase 5 wire line with 5x34 mm 2 AAAC on 8.0 meter PSCC poles with 65 meter span (iii) 3 phase 4 wire line with 3x55 mm 2 AAAC + 1x34 mm 2 AAAC over 8.0 meter PSCC poles with 65 meter span. 26

37 (iv) 3 phase 4 wire line with 4x34 mm 2 AAAC over 8.0 meter PSCC poles with 65 meter span. (v) Single phase 3 wire line with 3x34 mm 2 AAAC over 8.0 meter PSCC poles with 65 meter span. (vi) Single phase 2 wire line with 2x34 mm 2 AAAC over 8.0 meter PSCC poles with 60 meter and 65 meter span The usage of the above LT lines is as below: (i) 3 phase 5 wire with 55 mm 2 AAAC conductor Urban and rural areas for 3 phase supply (4 wires) and for street light supply (5 th wire). 45 meter span is adopted mainly in Hyderabad city and 65 meter span in other urban areas. (ii) 3 phase 5 wire with 34 mm 2 AAAC Rural areas for 3 phase supply (4 wires) and for street light supply (5 th wire). (iii) 3 phase 4 wire with 3x55 mm 2 + For supply to Agricultural pump sets and other 34mm 2 AAAC 3 phase loads. (iv) 3 phase 4 wire with 4x34 mm 2 For agricultural pumpsets and other 3 phase (v) AAAC LT single phase 3 wire line with 34mm 2 loads. For single phase supply for loads (2 wire) and street light (3 rd wire). Mostly used in urban and rural areas with single phase loads and street light connections. (vi) LT single phase 2 wire line with 34 mm 2 For single phase supply for residential / commercial loads. The costs of LT overhead lines as is being commonly constructed by the utility are given in Table-4.14 below: Table-4.14 Costs of LT Overhead Lines (Rs. In lakhs) Sl. No. Details Costs obtained / validated LT 3 phase 5 wire line with 3x55 mm 2 + 2x34mm 2 AAAC with 65 meter span over 8 meter PSCC poles. 2 LT 3 phase 5 wire line with 5x34mm 2 AAAC with 65 meter span over 8 meter PSCC poles. 3 LT 3 phase 4 wire line with 3x55 mm 2 + 1x34mm 2 AAAC with 65 meter span over 8 meter PSCC poles. 4 LT 3 phase 4 wire line with 4x34 mm 2 AAAC with meter span over 8 meter PSCC poles. 5 LT Single phase 3 wire line with 3x34 mm 2 AAAC with meter span over 8 meter PSCC poles. 6 LT 4 wire line with 3x16 mm 2 + 1x25mm 2 AB cable with 65 meter span over 8 meter PSCC poles The LT AB cable lines are erected, wherever short lengths of LT lines under small capacity (16/25 kva) distribution transformers are involved and also where HVDS is implemented. 27

38 (f) LT Underground System The utility is laying LT underground cable in the Hyderabad city wherever erection of overhead network is not feasible. The standard sizes of cables used by the utility are 3 ½ core 95, 70 and 25 mm 2 XLPE cables. The costs as obtained from the utility for underground cable system are given in Table-4.15 below. Table-4.15 Costs of Underground Cable System (Rs. In lakhs) Sl. Details Costs obtained/validated No ½ core 95 mm 2 XLPE LTUG cable This is done in a limited area in some housing colonies. No road restoration charges are involved in the above costs. (ii) 33 / 11 kv Substations (Receiving stations) The utility have standardised the transformer capacities and the number of 11 kv outgoing feeders etc., at the 33/11 kv substations. Since the utility is constructing a large number of substations, particularly, in rural areas the layout is simplified. The substation is erected in rural area with 1x5 MVA transformer initially and additional transformers added based on load development. The utility also is installing indoor substations in Hyderabad city where availability of land is scarce. The transformer capacity of the substations in Hyderabad city area are 2x5 MVA or 2x8 MVA. (a) Outdoor Substations The costs of 33/11 kv outdoor substations being constructed by the utility are given in Table-4.16 below: Table-4.16 Costs of 33/11 kv Substation (Outdoor) (Rs. In lakhs) Sl. Costs as obtained / validated No. Details /11 kv substations with 1x5MVA Transformers with 3 Nos. outgoing 11 kv feeder 2 33/11 kv substation with 1x5 MVA transformers and Nos. outgoing 11 kv feeders 3 33/11 kv substations with 1x5 MVA transformers with 4 Nos. 11 kv outgoing feeders. 4 33/11 kv substations with 2x5 MVA transformers with 5 Nos. 11 kv outgoing feeders. 5 33/11 kv substations with 2x8 MVA transformers with 6 Nos. 11 kv outgoing feeders

39 The costs with 5 MVA transformers are without 33 kv circuit breaker on 33 kv side of transformers and without capacitor bank. For the substation under item-4, a group control 33 kv CB is provided on HV side of power transformers. The power transformers are protected on the 11 kv side and also the 11 kv feeders with individual control breakers. Capacitor banks are provided wherever required. The substation cost including capacitor bank is considered for benchmark costs. The break-up costs for 33/11 kv substations as obtained from the utility and validated for (i) land (ii) civil works covering buildings etc., (iii) Equipment cost including structures, foundations, cabling etc., and (iv) contingencies, labour and establishment charges etc., are given in Table-4.17 below: Table-4.17 Break-up Costs for 33/11 kv Substations (Rs. In lakhs) Sl. Costs as obtained / validated Details No /11 kv substations with 1x5MVA Transformers with 3 Nos. outgoing 11 kv feeder i) Land ii) Civil works iii) Equipment etc iv) Contingencies, labour and establishment Total including civil works v) Capacitor Bank Total /11 kv substation with 1x5 MVA transformers and 2 Nos. outgoing 11 kv feeders i) Land ii) Civil works iii) Equipment etc iv) Contingencies, labour and establishment Total including civil works v) Capacitor Bank Total /11 kv substations with 1x5 MVA transformers with 4 Nos. 11 kv outgoing feeders. i) Land - - ii) Civil works iii) Equipment etc iv) Contingencies, labour and establishment Total including civil works v) Capacitor Bank Total /11 kv substations with 2x5 MVA transformers with 5 Nos. 11 kv outgoing feeders. i) Land ii) Civil works iii) Equipment etc iv) Contingencies, labour and establishment Total including civil works v) Capacitor Bank 7.44 Total Contd. 29

40 Sl. Costs as obtained / validated Details No /11 kv substations with 2x8 MVA transformers with 6 Nos. 11 kv outgoing feeders. i) Land - ii) Civil works iii) Equipment etc iv) Contingencies, labour and establishment v) Capacitor Bank 7.44 Total Note: The costs of land and civil works during are Rs lakhs against Rs lakhs during , due to considering land cost at Rs. 10 lakhs and additional cost for control room, compound wall etc. Earlier the utility used to get land free from government or consumers. While benchmarking the land costs are not being included (b) 33/11 kv Substation (Indoor) The indoor 33/11 kv substations are constructed in Hyderabad city because of space constraint. 33 kv and 11 kv switchgear and control panels are located indoor in the control room. The cost of control room in indoor substation is about 4 times the cost of control room in outdoor substation. The costs of indoor substations executed by the utility are as indicated in Table-4.18 below: Table-4.18 Cost of Substations (Indoor) (Rs. In lakhs) Sl. Details Costs obtained/validated No /11 kv indoor substation with 2x5MVA power Transformers with 5 Nos. outgoing 11 kv feeders 2 33/11 kv indoor substations with 2x8MVA power Transformers with 6 Nos. outgoing 11 kv feeders * The land cost of Rs. 20 lakhs is included in the costs. (iii) Distribution Transformer Stations (Outdoor) * - The utility installs distribution transformer stations with transformer capacities of 25 kva, 63 kva, 100 kva three phase and 15 kva single phase. The CSP distribution transformers with CRGO core are used by the utility. The costs of installation of distribution transformer stations including cost of structures, cabling, fuse control etc. as furnished by the utility are given in Table below: 30

41 Sl. No. Details Table-4.19 Cost of Distribution Transformers Stations (Rs. In lakhs) Costs obtained / validated Three Phase 11 kv/433 V Transformer stations 1 25 kva kva kva Single Phase 6.6 kv/250 V Transformer Stations 4 15 kva/16 kva (iv) Metering Equipment and Meters The costs of metering equipment and meters being installed by the utility are given in Table-4.20 below: Table-4.20 Costs of Metering Equipment and Meters (Rs. ) Sl. Costs obtained / validated Details No kv CTs for HT metering 20,029 20, kv CT/PT set for HT metering 31,886 26,100 3 HT trivector meter 4,907 6,671 4 LT 3 Phase meters 1,522 1,681 5 LT single phase meter The utility provides only static meters to all consumers. (v) Service Line Costs The service line costs for various classes of consumers as provided by the utility are given in Table4.21 below: Table-4.21 Service Line Costs (Rs.) Sl.No. Costs obtained / Details validated Single Phase service for domestic / non-domestic with electronic meter 2 Three phase service for domestic / non-domestic with electronic meter 3 Three phase agricultural service with meter Industrial service upto 20 HP Industrial service above 20 HP with LT Trivector meter 11,300 11,000 6 Street light service LT Trivector meter erected on LV side of DTR,. 10,900 11,000 The benchmark costs for all components of Distribution Business are discussed in Chapter-5. 31

42 3. Tamil Nadu Electricity Board (TNEB) The Tamil Nadu Electricity Board (TNEB) awards the works mostly on labour contract with all the material / equipment supplied by the Board. In some cases the contractor supplies minor materials and executes the work. The costs of various elements in distribution business as furnished by TNEB are discussed below: (i) 33/11 kv, 22 kv,11 kv and LT Lines TNEB is an integrated utility in-charge of generation as well as the transmission and distribution network in the State. The voltages of 33 kv, 22kV, 11 kv and LT come under distribution. 33 kv, 11 kv and LT underground cable system is implemented in Chennai city. (a) 33 kv Lines 33 kv Overhead Lines The cost of 33 kv overhead lines as obtained from TNEB are given in Table 4.22 below: Table-4.22 Costs of 33 kv lines (Rs. in lakhs/km) Sl. Details Costs as obtained / validated No kv line with 100 mm 2 (DOG) ACSR with meter span on 9.14 meter special RCC poles. (b) 33 kv Underground cable system The costs of 33 kv underground cable system, as obtained from TNEB is given below in Table Table-4.23 Cost of 33 kv Underground Cable System (Rs. in lakhs/km) Sl. Details Costs as obtained/validated No i) 33 kv X LPE underground cable 1x630 mm 2 ( circuits) per km. ii) Road restoration charges Total The cost of laying cables varies from route to route as road restoration charges differ vastly from place to place and the expenditure involved is substantial. Benchmarking is considered for the costs other than road restoration charges. 32

43 (c) 11 kv and 22 kv System 11 kv and 22 kv over headlines The costs for 11 kv and 22kV lines with different sizes of conductor, supports and spans as obtained from TNEB are given below in Table Table-4.24 Costs of 11 kv Lines (Rs. in lakhs/km) Sl. Costs as obtained / validated Details No kv line with 7/4.09 mm ACSR at 105 meter span on 9.14 meter RCC poles kv line with 7/3.35 mm ACSR at 85 meter span on 8 meter RCC poles kv lines with 7/3.35 mm ACSR at 67 meter span on 7.5 meter RCC poles 4 22 kv line with 7/2.59 mm ACSR at 60 meter span over 8 meter RCC poles 5 22 kv line with 7/3.35 mm ACSR at 75 meter span over 8 meter RCC poles TNEB has both 11 kv and 22 kv voltages. The 11 kv line with 85 meter span is constructed in rural areas and with 67 meter span is constructed in urban areas. Similarly the 22 kv lines. 22 kv voltage is limited to about 4 districts in the State. (d) 11 kv Underground cable system The costs of 11 kv UG cable system as obtained from TNEB is given below in Table- 4.25: Table-4.25 Costs of 11kV Underground Cable System (Rs. in lakhs/km) Sl. Costs as obtained / validated Details No i) Laying of 11 kv 3x300mm 2 X LPE underground cable ii) Road restoration charges Total i) Laying of 11 kv 3x120mm 2 X LPE underground cable ii) Road restoration charges Total

44 The road restoration charges may vary from place to place. The actual costs depend on the area of working and the extent of road cutting and the type of road, such as BT, GST or NH road. The costs include the costs of straight joints, terminations, trough and the cost of cable. L T System (e) LT overhead lines The costs of LT overhead lines as obtained from TNEB are given in Table4.26 below: Table-4.26 Costs of LT overhead Lines (Rs. in lakhs/km) Sl. Details Costs as obtained/validated No LT 3 phase 4 wire line with 3x7/ x7/2.59 mm ACSR with 60 meter span on 8 M, PSCC poles. 2 LT 3 phase 4 wire line with 4x7/2.59 mm ACSR with 75 meter span over 7.5 M, RCC poles. 3 LT single phase 3 wire line with 3x2.59 ACSR with 75 meter span over 7.5M, RCC poles. 4 LT single phase 2 wire line with 2x2.59 ACSR with 75 meter span over 7.5 M, RCC poles (f) LT Underground System The underground system in TNEB is mostly in Chennai, the costs as furnished by TNEB are given in Table-4.27 below: Table-4.27 Costs of LT Underground System (Rs. in lakhs/km) Sl. Details Costs as obtained / validated No i) Laying of LT, 4x120mm 2 X LPE underground cable ii) Road Restoration charges Total The costs include the costs of straight joints, terminations, trough, and the cost of cable. 34

45 (ii) 33/11 kv Substations (Receiving Stations) TNEB adopts power transformer capacities of 1x8 MVA or 2x8 MVA at its 33/11 kv substations and has both indoor and outdoor substations. The cost of substations with break-up of costs into (i) land (ii) civil works (iii) equipment and material costs and (iv) over heads etc., as obtained / validated, are given in Table 4.28 below: Table-4.28 Break-up costs of 33/11 kv substations costs with break-up details (Rs. in lakhs) Sl. Details Costs as obtained / validated No /11 kv A outdoor with 1x8MVA transformers and 3 out going feeders (a) land (b) Civil works (c) Equipment and material (d) Contingencies, labour and establishment charges Total including land and civil works (e) Capacitor Bank (2.4 MVAR) with associated accessories Total including capacitor bank /11 kv Indoor substation with 1x 8 MVA with 4 out going feeders (a) land 2.00 (b) Civil works (c) Electrical works material and equipment (d) Contingencies, labour and establishment charges etc. Total including land and civil works (e) 11 kv capacitor bank (2.4 MVAR) Total including capacitor bank (3) 33/11 kv outdoor SS with 2x8 MVA with 3 out going feeders (without quarters) (a) land 5.94 (b) Civil works (c) Electrical works equipment and material (d) Contingencies, labour and establishment charges Total cost including land and civil works (e) 11kV Capacitor bank (4.8 MVA) Total including capacitor bank (4) 33/11 kv indoor substation with 2x8 MVA Transformers and 6 out going feeders. (a) land (b) Civil works (c) Electrical works equipment and material (d) Contingencies, labour and establishment charges Total cost including land and civil works (e) 11 kv capacitor bank (4.8 MVAR) Total including capacitor bank The actual costs booked for items (2) and (3) are less as the released transformers from other stations are erected for these works and depreciated costs of removed transformers are taken into account. Hence the above costs shown in the table are 35

46 validated ones, with the cost of new transformers, which are to be considered for bench marking. The difference in the costs of different substations is only due to the cost of land, control room (control rooms in some places are constructed to accommodate different offices). The equipment cost and the contingency, establishment and general charges vary marginally. It is the practice in TNEB that in most of the estimates the depreciated costs of the released power transformers available is provided. The same cost is provided, while arriving at the cost as per actuals. For benchmarking purpose, the depreciated costs of equipment cannot be taken into account, only the cost of new equipment procured / to be procured during a particular year has to be taken into account. All these issues are taken into consideration, and the benchmark cost for 33/11 kv substations are discussed in Chapter-5 considering the substation costs only along with the data obtained form other States. (iii) Distribution Transformer Stations TNEB installs distribution transformer stations with transformer capacities of 63 kva, 100 kva, 200 kva, 250 kva and 500 kva of 11 kv/433 V and 22 kv/433 V. The costs of distribution transformer stations including cost of structure, cabling etc., as obtained from TNEB are given in Table-4.29 below: Table-4.29 Costs of Distribution Transformer Stations (Rs. in lakhs) Sl. Details Costs as obtained / validated No kv/433v Transformer stations 1 63 kva CSP Transformers kva CSP Transformers kva CSP Transformers kva CSP Transformers kv/433v Transformer stations 1 63 kva CSP Transformers kva CSP Transformers kva CSP Transformers kva CSP Transformers The actual costs, incurred by TNEB are much less than the above as the costs of released transformers from other stations are taken in actual execution costs. Hence for benchmarking purpose, the costs of new transformers ordered during the particular year are taken into consideration and validated accordingly. 36

47 TNEB is not ordering Amorphous core transformers and BEE Energy Efficiency star rating transformers. (iv) Metering Equipment The costs of metering equipment and meters being installed by TNEB as obtained from them are given in Table-4.30 below: Table-4.30 Costs of Metering Equipment and Meters (Rs. each) Sl. Details Costs as obtained No kv CT (outdoor) kv CT (outdoor) kv PT (outdoor) kv PT (outdoor) kv PT (Indoor) kv PT (Indoor) HT Trivector meter LT 3 Phase meter LT single phase meter TNEB is providing mostly static meters. For 33kV and 11kV metering, the cost of metering equipment and trivector meter is to be considered together. (v) Service Line Costs The service line costs for different categories of consumers based on supply voltage etc., as obtained from TNEB are given in Table-4.31 below: Table-4.31 Service Line Costs (Rs. each) Sl.No. Details Cost as per cost data Industrial connection upto 15 HP Industrial connection above 15 HP upto 50 HP Agricultural connection Single phase domestic and commercial connection Street light connection with single phase meter The service line charges are normally collected as a fixed amount. The benchmarks costs for various elements in distribution business detailed above are discussed in Chapter-5 on evaluation of costs from other utilities. 37

48 4. Uttar Gujarat Vij Company Limited (UGVCL) The distribution companies in Gujarat handle only 11 kv and LT network under distribution. There is also 22 kv network which is negligible. The EHV voltages adopted in Gujarat are 400 kv, 220 kv and 66 kv 66 kv and above are handled by Transmission Company. UGVCL draws power at 11 kv and 22 kv from 66/11 kv and 66/22 kv substations and manage only 11 kv, 22kV and LT network under distribution. The costs collected for various components of distribution business from UGVCL are discussed below: (i) 22 kv, 11 kv and LT network (a) 22 kv and 11 kv lines (Overhead) The cost of 22 kv and 11 kv lines (overhead) being constructed by UGVCL, obtained from the utility and validated are given in Table 4.32 below: Table-4.32 Costs of 22kV and 11 kv Lines (Rs. in lakhs/km) Sl. Details Costs obtained/validated No * 1 22 kv line with 55 mm 2 AAAC on 8 meter PSCC poles with 50 meters span. *2.234 * kv line with 34 mm 2 AAAC over 8 meter PSCC poles with 50 meters span. *1.824 * kv line with 55 mm 2 AAAC on 8 meter PSCC poles with 50 meters span kv line with 34 mm 2 AAAC on 8 meter PSCC poles with 50 meter span kv line with Dog ACSR conductor on RS Joist supports with 33 meter span *No new 22 kv line is constructed during and The values shown are as per cost data, which can be adopted for benchmark purpose. There is no 11 kv and 22 kv underground cable system in UGVCL. (b) LT lines (Overhead) The LT lines being constructed by the utility to service different classes of consumers and the costs as obtained from the utility and validated are given in Table 4.33 below: 38

49 Sl. No. Table-4.33 Costs of LT lines (Overhead) (Rs. in lakhs/km) Details Costs as obtained / validated LT 3 Phase 5 wire line with 3x55mm 2 + 2x34 mm 2 AAAC with 30 meter span over RS joists 2 LT 3 Phase 5 wire line with 3x55mm 2 + 2x34 mm 2 AAAC with 50 meter span on 8 meter PSCC poles. 3 3 Phase 5 wire line with 34 mm 2 AAAC with 30 meter span over 8 meter PSCC poles. 4 3 Phase 5 wire line with 34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles. 5 3 Phase 4 wire line with 3x55 mm 2 +1x34 mm 2 AAAC with 30 meter span over RS joists. 6 3 Phase 4 wire line with 3x55 mm 2 +1x34 mm 2 AAAC with 30 meter span over 8 meter PSCC poles 7 3 Phase 4 wire line with 3x55 mm 2 +1x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 8 3 Phase 4 wire line with 34 mm 2 AAAC with 30 meter span over 8 meter PSCC poles. 9 3 Phase 4 wire line with 34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles. 10 Single phase 3 wire line with 2x55mm 2 +1xc34 mm 2 AAAC with 30 meter span over 8 meter PSCC poles 11 Single phase 3 wire line with 2x55mm 2 +1xc34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 12 Single phase 2 wire line with 34 mm 2 AAAC with 50 meter span over 8 meter supports As explained under APSPDCL the LT lines with different conductor configuration (5 wire, 4 wire, 3 wire and 2 wire) are constructed for different purposes and also span lengths adopted are different in urban and rural areas. LT Underground Cable System There is no LT underground cable system in UGVCL. (ii) 33/11 KV Receiving Stations (substations) As mentioned earlier the utility does not have 33 KV system, the utility draws power at 11 kv from 66/11 kv substations of Transmission Company. (iii) Distribution Transformer Stations (Outdoor) The utility installs 25 kva, 63 kva, and 100 kva, 11 kv/433 V distribution transformer stations and also 22 kv/433 V transformer stations with of 63 kva & 100 kva capacity transformers. 39

50 The costs of distribution transformer stations as obtained / validated from the utility are given in the Table 4.34 below. The costs include the cost of structure, cabling, erection etc. Table 4.34 Costs of Distribution Transformer stations (Rs. Lakhs/each) S. No. Details Costs as obtained/validated KVA, 11 KV/433 V Transformer station KVA, 11 KV/433 V CSP Transformer Station KVA 11 KV/433 V CSP Transformer station KV/433 V, 63 KVA Transformer station KV/ 433 V, 100 KVA Transformer station The actual costs of the above items is less as the transformers procured during earlier years were used, when the costs were less. These costs are validated taking into account, the cost of transformers procured during the year, for benchmarking purposes. The utility is not procuring Amorphous core and BEE Energy efficient Star rated transformers. (iv) Metering Equipment and Meters The metering equipment includes 11 KV CT/PT set, trivector meters, LT-3 phase and single phase meters. The costs as obtained are given in Table 4.35 below: Table 4.35 Costs of Metering Equipment (Rs./each) S.No Details Cost of Metering Equipment KV CT/PT Set 33,000-2 Trivector meter phase meter Single phase meter For 11 kv metering the cost of metering equipment and trivector meter has to be considered together. 40

51 (v) Service Line Costs The service line costs being adopted by UGVCL are given below in Table 4.36 Table 4.36 Service Line costs S. Details Cost in Rs. No Single phase service (upto 6 kw) Single phase street light connection Three phase service connection upto 5 HP Three phase service connection 5 HP to 10 HP Three phase service connection 10 HP to 20 HP Three phase service connection 20 HP to 60 HP Three phase service connection 60 HP and above The utility normally adopts standard rates to different class of consumers of Residential, commercial, small industries etc. For other consumers the costs are worked out individually. The benchmark costs for various elements in distribution business detailed above are discussed in chapter-5 on evaluation of costs from other utilities. 41

52 5. Madhya Gujarat Vij Company Limited (MGVCL) As discussed under Uttar Gujarat Vij Company Limited (UGVCL), the distribution companies in Gujarat handle 11 kv and LT systems and they draw power at 11 kv from 66/11 kv substations of Transmission Company. The costs collected for various elements of distribution business are discussed below: (i) 11 kv and LT System a) 11 kv Lines (Overhead) The costs furnished by the utility for the 11 kv lines being constructed by them are obtained / validated as given in Table 4.37 below: Table-4.37 Costs of 11 kv Lines (Overhead) (Rs. in lakhs/km) Sl. Details Costs as obtained / validated No kv line with 55 mm 2 AAAC on 8 meter PSCC poles with 50 meters span kv line with 34 mm 2 AAAC on 8 meter PSCC poles with 50 meter span (b) 11 kv Underground Cable System The 11 kv underground cables are used in MGVCL extensively. The costs furnished by the utility for the 11 kv underground cables are given in Table-4.38 Table-4.38 Costs of 11 kv Underground System (Rs. in lakhs/km) Sl. Details Costs as obtained/validated No Laying of 11 kv X LPE aluminium 3 core 185 mm 2 including cost of cable and accessories per km The costs are less during , as the cost of cables procured is less during The above cost do not include road restoration charges. 42

53 (c) LT lines (Overhead) The costs of LT overhead lines obtained from the utility and validated are given in Table-4.39 below: Table-4.39 Costs of LT Overhead lines (Rs. in lakhs/km) Sl. Details Costs as obtained / validated No Phase 5 wire line with 3x55mm 2 + 2x34 mm 2 AAAC 50 meter span as 8 meter PSCC poles. 2 3 Phase 5 wire line with 5x34 mm 2 AAAC 50 meter span on 8 meter PSCC poles. 3 3 Phase 4 wire line with 3x55 mm 2 +1x34mm 2 AAAC 50 meter span on 8 meter PSCC poles. 4 3 Phase 4 wire line with 4x34 mm 2 AAAC with 50 meter span on 8 meter PSCC poles. 5 Single Phase 3 wire line with 3x34 mm 2 AAAC 50 meter span on 8 meter PSCC poles 6 Single Phase 2 wire line with 2x34 mm 2 AAAC with 50 meter span on 8 meter PSCC poles LT Underground Cable System The utility is not having LT underground cables system. (ii) 33/11 KV Substations (Receiving Stations) As mentioned earlier the utility manages only 11 kv and LT system and draws power at 11 kv from 66 / 11 kv substations of Gujarat Transmission Corporation. Hence, the utility does not have 33 kv system. (iii) Distribution Transformer Stations (Outdoor) The utility installs only 25 KVA, 63 KVA, and 100 AVA 11 KV/433 V distribution transformer stations. The cost of distribution transformer stations including the cost of installation, cabling AB switch etc., as obtained from the utility and validated are given in Table-4.40 below: 43

54 Table 4.40 Costs of Distribution Transformer Stations (Outdoor) (Rs. Lakhs) S. Details Costs as obtained/validated No Installation of 25 KVA, CSP Distribution Transformer station 2 Installation of 63 KVA CSP distribution transformers station 3 Installation of 100 KVA CSP Distribution Transformers station (iv) Metering Equipment and Meters The cost of metering equipment and meters as furnished by the utility are given in Table-4.41 below: Table 4.41 Costs of Metering Equipment and Meters (Rs. each) S.No Details Cost of Metering Equipment and meters as obtained KV CT/PT Set 34,300-2 HT Trivector meter LT 3 phase meters LT single phase meter For 11 kv metering the cost of metering equipment and trivector meters is to be considered together. (v) Service Line Costs The service line charges are generally standardised based on the class of consumer and the costs being adopted by the utility are given in Table-4.42 below: Table 4.42 Service Line Costs S. Details Cost in Rs. No Single phase service (upto 6 kw) Single phase street light connection Three phase service connection upto 5 HP * 4 Three phase service connection 5 HP to 10 HP * 5 Three phase service connection 10 HP to 20 HP * 6 Three phase service connection 20 HP to 60 HP Three phase service connection 60 HP and above *The reduction in the cost in is due to reduction in the cost of 3 phase static meters. The benchmark costs for various elements in distribution business, detailed above are discussed in Chapter-5 on evaluation of the costs from other utilities. 44

55 6. Madhya Pradesh Paschima Kshetra Vidyuth Vitaran Company Limited (MPPKVVCL), Indore The Distribution companies in Madhya Pradesh operate distribution voltages of 33 kv, 11 kv and LT. The costs collected from MPPKVVCL for various components of distribution business is discussed below: i) 33 kv, 11 kv and LT Network (a) 33 kv lines (overhead) The costs of 33 kv lines (overhead) being constructed by MPPKVVCL are obtained and validated and the costs are given in Table-4.43 below: Table-4.43 Costs of 33 kv lines (Overhead) (Rs.lakhs/km.) Costs as obtained/ Sl. Details validated No kv line with 80 mm 2 (Raccoon ) ACSR over meter PSCC poles with 100 meter span kv line with 100 mm 2 (Dog) ACSR over 9.1 meter PSCC poles with 100 meter span The utility has no 33 kv underground system. (b) 11 kv lines (overhead) The costs of 11 kv lines (overhead) obtained from the utility and validated are given in Table-4.44 below: Table-4.44 Cost of 11 kv lines (overhead) (Rs. in lakhs/km) Sl. Costs as obtained/validated Details No kv line with 50 mm 2 (Rabbit ) ACSR over meter PSCC poles with 100 meter span. The utility has no 11 kv underground system. 45

56 (c) LT Lines (Overhead) The costs obtained from the utility and validated for LT overhead lines are given in Table-4.45 below: Table-4.45 Costs of LT Lines (overhead) (Rs. in lakhs/km) Sl. No. Details Costs as obtained/ validated phase 5 wire line with 4x 50 mm 2 and 1x30 mm 2 ACSR over 8 meter PSCC poles with 67 meter span 2 3 phase 5 wire line with 3x 50 mm 2 and 2x30 mm 2 ACSR over 8 meter PSCC poles with 67 meter span 3 3 phase 5 wire line with 5x 30 mm 2 (Weasel) over 8 meter PSCC poles with 67 meter span 4 3 phase 4 wire line with 3x50mm 2 + 1x30mm 2 ACSR over 8 meter PSCC poles with 67 meter span 5 Single phase 3 wire line with 3x30mm 2 ACSR over 8 meter PSCC poles with 67 meter span d) HVDS Scheme HVDS scheme is conversion of existing LT system to 11 kv system and installation of 10, 16 and 25 kva three phase transformers replacing the existing 63 kva, 100 kva and 200 kva three phase transformers. The costs of conversion of existing LT lines to 11 kv and 6.6 kv and installation of 10 to 25 kva transformers are as given in Table-4.46 below: Table-4.46 Conversion Costs HVDS Scheme (Rs. in lakh) Sl. Details Costs as obtained / validated No Transformers 1 25 kva 11 kv/433 V distribution transformer installed on single pole structure 2 16 kva 11 kv/433 V distribution transformer installed on single pole structure 3 10 kva 11 kv/433 V distribution transformer installed on single pole structure Conversion Cost of LT line to 11 kv (Cost / Km.) 4 Conversion of existing LT line to 11 kv on existing poles and conductor per km. 5 Conversion of existing LT line to 11 kv with introduction of additional poles and replacement of conductor (weasel) per km. 6 Conversion of existing LT line to 6.6 kv single phase two wire line on existing poles and replacement of conductor per km

57 The net conversion costs of LT line to 11 kv and replacement of existing 100 kva and 200 kva transformers with 16 kva and 25 kva transformers within the feeding area of 100 kva transformer and 200 kva transformer are as given in Table-4.47 below: The costs are net on giving credit to the existing 100 kva and 200 kva transformers. Table-4.47 Costs of HVDS (Conversion of LT to 11 kv line etc.) (Rs. in lakhs) Net cost obtained / Sl. Details validated No Conversion costs LT to HT 1 Conversion cost of LT line to 11 kv and replacement of 100 kva transformer with required number of 25 kva transformers. 2 Conversion cost of LT line to 11 kv and replacement of 200 kva transformer with required number of 25 kva transformers The costs are net after giving credit to the released 100 kva and 200 kva transformers. (ii) 33/11 kv Substations (Receiving Stations) The utility installs 33/11 kv substations with transformer capacities of 1.6 MVA, 3.15 MVA and 5 MVA. The substations are constructed with 1x1.6 or 1x3.5 MVA or 1x5 MVA transformer initially and additional transformer added based on load development. The provision is made in the substation layout for the second transformer, switchgear etc. The costs of 33/11 kv substations as obtained from the utility and validated with break-up costs of (i) land (ii) civil works (iii) equipment and material costs and (iv) labour, establishment etc., are given in Table-4.48 below: 47

58 Sl. No. Table-4.48 Break-up Costs of 33/11 kv substations Details (Rs. in lakh/each) Cost as obtained/ validated x1.6 MVA transformer substation i) Land - - ii) Civil works control room, compound wall, bore well etc. iii) Cost of equipment foundation, cabling, single phasing AB switch etc iv Labour, establishment, contingencies etc Total cost x3.15 MVA transformer substation i) Land - - ii) Civil works including control room, compound wall etc iii) Equipment structures etc., including cabling iv) Labour, establishment, transport and other contingencies etc Total Cost v) Capacitor bank Substation with capacitor bank x5 MVA transformer substation i) Land - - ii) Civil works including control room, compound wall etc iii) Equipment, substation structures, cabling etc * iv) Labour, establishment, transport etc Total v) Capacitor bank etc Total cost * The equipment cost in item 3 (iii) for is less due to the reduced cost of power transformer. (iii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with 16 kva, 25 kva, 63 kva, 100 kva and 200 kva distribution transformers. The costs of distribution transformer stations installed with different capacities of transformers as obtained from the utility are given in Table-4.49 below. The costs include structure, cabling etc. 48

59 Sl. No. Table-4.49 Costs of 11 kv/0.4 kv DTR stations (Rs. in lakh/each) Cost as obtained / validated Details kva, 11 kv/433 V distribution transformer on 8 meter PCC poles 2 25 kva 11/433 V distribution transformer on 8 meter PCC poles 3 63 kva 11 kv/433 V transformer on 8 meter PCC poles kva 11 kv/433 V transformer on 8 meter PCC poles (iv) Metering Equipment and Meters The costs of metering equipment and meters as obtained from the utility are given in table 4.50 below: Table-4.50 Metering Equipment and Meters (Rs. each) Sl. Costs of procurement Details No kv metering equipment and metering kv metering set Trivector meters LT 3 Phase meters LT Single phase meters In the case of 33 kv and 11 kv the cost of Trivector meter to be added to the cost of metering equipment. 49

60 7. Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited (MPMKVVCL), Bhopal As mentioned earlier under MPPMKVVCL the distribution companies in Madhya Pradesh operate 33 kv, 11 kv and LT systems under distribution. The costs of various elements of Distribution business are discussed below: (i) 33 kv, 11kV and LT Lines (a) 33 kv Lines (Overhead) The costs of 33 kv lines (overhead) as being constructed by the utility as obtained from the utility and validated are given in Table-4.51 below: Sl. No. Details Table-4.51 Costs of 33 kv Lines (Overhead) (Rs. in lakhs/km) Costs as obtained / validated kv line with 80 mm 2 ACSR over 9.1 meter PCC Poles with 100 meter span kv line with 100 mm 2 ACSR over 9.1 meter PCC poles with 100 meter span (b) 11 kv Lines (overhead) The costs of 11 kv lines (overhead) as being constructed by the utility as obtained from the utility and validated are given in Table-4.52 below: Sl. No. Details Table-4.52 Cost of 11 kv Lines (overhead) (Rs. in lakhs/km) Costs as obtained / validated kv line with 50 mm 2 ACSR over 8 meter PCC Poles with 100 meter span

61 (c) LT Lines (Overhead) The utility constructs three phase LT 5 wire and 4 wire lines with different sizes of conductors and supports. The costs obtained / validated from the utility for the LT overhead lines are given in Table-4.53 below: Table-4.53 Costs of LT Lines (overhead) (Rs. in lakhs/km) Sl. No. Details Costs as obtained / validated phase 5 wire line with 4x 50 mm 2 + 1x30 mm ACSR over 8 meter PCC poles with 67 meter span 2 3 phase 5 wire line with 5x 30 mm 2 ASCR over meter PCC poles with 67 meter span 3 3 phase 4 wire line with 3x mm 2 + 1x30 mm 2 ACSR over 8 meter PCC poles with 67 meter span (d) HVDS Scheme: HVDS scheme is conversion of existing LT lines to 11 kv line on the existing supports with same conductor or replacement of conductor in some cases and replacing the existing 100 kva or 200 kva transformers with required number of 25 kva transformers. This is being implemented in the case of LT lines feeding agricultural pump sets. The HVDS costs are provided in the cost data for but no works are taken up sofar. As per the cost data provided, the existing LT lines are converted to 11 kv with replacement of conductor and introducing additional supports in some cases. The existing 100 kva and 200 kva transformers replaced with required number of 25 kva transformers. The released transformers are returned to the stores giving credit. As per the cost data, the net costs on the conversion of LT lines being fed by 100 kva or 200 kva transformers are given in Table-4.54 below: 51

62 Table-4.54 Cost of HVDS (Conversion of LT to 11 kv line etc.) (Rs. in lakhs) Sl. No. Details Net costs as per cost data The net cost of conversion of LT line to 11 kv and 9.82 replacement of 100 kva transformer with required No. of 25kVA transformers 2 The net cost of conversion of LT line to 11 kv and replacement of 200 kva transformer with required No. of 25kVA transformers (ii) 33/11 kv Substations (Receiving Stations) (Outdoor) The utility installs 33/11 kv substations with 1x1.6 MVA, 1x3.15 MVA and 1x5 MVA power transformer initially with provision to install additional transformers based on the load growth. The costs for 33/11 kv substations as obtained from the utility and validated with break-up costs of (i) land (ii) civil works (iii) equipment and material costs and (iv) labour, establishment etc. are given in Table-4.55 below: Table-4.55 Break-up Costs of 33/11 kv substations (Outdoor) Sl. No. Details (Rs. in lakhs/each) Costs as obtained/ validated /11 kv Substation with 1x1.6 MVA transformer a) Land - - b) Civil works control room, compound wall etc c) Equipment including, structure foundation costs, cabling etc. single phasing AB switch etc. d) Labour, establishment, transport etc Total including civil works e) Capacitor bank - - Total /11 kv 1x3.15 MVA Transformer a) Land - - b) Civil works including control room, compound wall etc c) Equipment, structures etc., including cabling d) Labour, establishment, transport etc Total Cost including civil works e) Capacitor bank Total /11 kv SS with 1x5 MVA power transformer a) Land - - b) Control room, compound wall and other civil works c) Equipment including structures, foundations and cabling * etc. d) Erection, Establishment, transport etc Total e) Capacitor bank etc Total cost * The equipment cost in item 3 (iii) for is less due to the reduced cost of power transformer as per turn key contract. 52

63 For purpose of benchmark costs, the installation of substation with single transformer will be considered as the utility constructs the substations mostly with single transformer and later provides additional transformer. The additional cost is benchmarked separately. (iii) Distribution Transformer Stations (Outdoor) The utility installs transformer stations with transformer capacities of 16 kva, 25 kva, 63 kva and 100 kva. The costs of distribution transformer stations (outdoor) as obtained from the utility and validated are given in Table-4.56 below: Table-4.56 Costs of Distribution transformer Stations (outdoor) (Rs. in lakhs/each) Sl. Costs as obtained/ Validated Details No kv/433 V outdoor transformer stations with 8 meter PCC poles double pole structure. (i) 16 kva station (ii) 25 kva station (iii) 63 kva station (iv) 100 kva station

64 8. Uttarkhand Power Company Limited (UPCL) The Uttarkhand Power Company Ltd, a distribution company in Uttarkhand operates 33 kv, 11kv, &LT voltages under distribution. The terrain in the state being hilly the construction standards and the costs of lines and substations are comparatively high. The costs of various elements of distribution business as obtained / validated are discussed below. (i) 33kv, 11kv & LT lines (Overhead) (a) 33kv lines (Overhead) The 33kv lines are constructed with steel tubular poles as against PSCC poles in most of the other states. The steel tubular poles are much costlier than PSCC poles. The costs of 33kv lines as obtained from the utility are given in Table-4.57 below: Table-4.57 Costs of 33kv lines (over head) (Rs lack/km) Costs as obtained / S. Details validated No kv line with 100mm 2 ACSR over 9 meter steel tubular (ST) poles 50 meter span with 7/16 SWG steel ground wire 2. 33kv line with 100 mm 2 ACSR over 11 meter ST poles with 58 meter span with 7/16 SWG steel/ground wire (b) 11kv lines (Overhead) The costs of 11 kv lines as obtained from the utility and validated are given in the Table-4.58 below: Table-4.58 Costs of 11 kv Lines (Rs lakh/km) Costs as obtained / S. Details validated No kv line with 50mm 2 ACSR and 7/16 SWG steel ground wire over ST poles with 50 meter span 2. 11kv line with 50mm 2 ACSR and 7/16 SWG ground wire over ST poles with 60 meter span

65 (c) 11kv UG Cable The costs of 11 kv UG cable system as obtained from the utility and validated are given in Table4.59 below: Table-4.59 Cost of 11 kv UG Cable System (Rs lakh/km) Costs as obtained / S. Details validated No kV UG cable line with 3x120mm 2 X LPE cable kv UG cable line with 3x185 mm 2 X LPE cable No road cutting charges are involved in the above costs. (d) LT lines The costs of LT lines as obtained from the utility and validated are given in Table4.60 below: Table-4.60 Costs of LT Lines (Rs lakh/km) Costs as obtained / S. Details validated No LT 2 wire line with 2x30mm 2 ACSR and 7/16 SWG ground wire over ST poles with 40 meter span. 2. LT 3 wire line with 3x30 mm 2 ACSR and 7/16 SWG earth wire over ST poles with 40 meter span i) Hilly area ii) plain area LT 3 Phase 5 wire line with 4x80mm2 ACSR and 7/16 SWG steel wire over ST poles with 40 meter span (e) LT AB Cable Lines The costs of LT AB cable lines as obtained from the utility and validated are given in Table-4.61 below: Table-4.61 Costs of LT AB Cable Lines (Rs. lakhs/km) S. Costs as obtained / validated Details No LT AB cable 3x16 mm 2 + 1x25 mm 2 over ST poles with 50 meter span i) Hilly area ii) Plain area S Phase 2 wire A.B cable 1x16 +1x25 mm 2 over 8 meter ST pole with 50 meter span i) Hilly area ii) Plain area

66 As mentioned above the lines in the utility area are being constructed over steel tubular poles, with shorter spans (50 meters) and an earth wire (steel wire) in addition to ACSR power conductors. The cost / km is much higher than the cost of similar voltage lines constructed by other utilities with AAAC / ACSR over PSCC / RCC poles with longer spans (60 to 100 meters) and without continuous steel earth wire. Hence the costs in Uttarkhand cannot be compared with the costs in other utilities to benchmark the costs. (ii) 33/11 KV Substations (Receiving Stations) The utility constructs 33/11 kv substations with a single transformer of 3 MVA, 5 MVA and 8 MVA capacity initially and additional transformer is added or the transformer capacity enhanced from 3 MVA to 5 MVA and 5 MVA to 8 MVA based on the load development. The costs obtained from the utility and validated with break-up costs for (i) land (ii) civil works (iii) equipment and (iv) erection, establishment and other expenses are given in the Table 4.62 below: Table 4.62 Break-up costs of 33/11 KV Substations (Rs. In lakhs) S.No Details Costs as obtained / validated /11 KV substation with 1x3.15 MVA Transformer i) Land - - ii) Control room, compound wall and other Civil works iii) Equipment structures, cabling, etc iv) Erection, establishment and other costs Total /11 KV substation with 1x5 MVA transformer i) Land - - ii) Control room, Compound wall etc iii) Equipment, structures, cabling etc * iv) Erection, Estt. and other costs Total /11 KV Substation with 1x8 MVA Transformer (indoor) i) Land - - ii) Control room, Compound wall and other civil works iii) Equipment, Structures, cabling etc iv) Erection, establishment and other charges Total * The equipment cost in item 2 (iii) is less due to the reduced cost of power transformer. The utility is not erecting any capacitor bank in the substations. 56

67 (iii) Distribution Transformer Stations The utility installs Distribution Transformer stations with single phase 16 KVA and three phase transformers of 25 KVA, 63 KVA, 100 KVA, 250 KVA and 400 KVA. The costs of installation of distribution transformer stations as obtained from the utility and validated are given in Table 4.63 below. Table Costs of Distribution Transformer Stations (Outdoor) (Rs. in lakhs) Costs as obtained/ S.No Details validated KV / 433 V, 400 KVA DTR station on steel supports KV / 433 V, 250 KVA DTR station on steel supports KV / 433 V, 100 KVA DTR station on steel supports KV / 433 V, 63 KVA DTR station on steel supports KV / 433 V, 25 KVA transformer station on PSCC poles (iv) Metering Equipment and Meters The costs of metering equipment and meters as furnished by the utility are given in Table 4.64 below: Table-4.64 Costs of Metering equipment and Meters S.No Details Cost (Rs.) KV metering PT 9150 (during ) 2 33kV CT (during ) 3 HT Trivector meters LT 3 phase meters LT 1 phase meters 960 The metering costs to 33 kv and 11 kv consumers are the cost of metering equipment plus trivector meter cost. 57

68 9. West Bengal State Electricity Distribution Company Limited (WBSEDCL) WBSEDCL prepared cost data / cost estimates for 33kV system during and updated the same during Similarly cost data / cost estimates were prepared for 11kV and LT system during and updated during The cost data provides for 30% extra in hilly area for additional labour charges etc. Cost escalation at 10% per year is considered during estimation for any work of subsequent year on the available cost data of earlier year, if cost data is not revised in that year. The cost data is taken as basis for preparation of estimates for various works and for awarding works on contract. Works are normally executed within the estimated costs. The works are generally executed on labour contract i.e. the utility supplying all major materials or partially turnkey contracts. The cost estimates prepared by the utility based on the cost data and works as executed have been verified and found that the completion costs are generally within the cost estimates. For developing infrastructure in rural areas under Rajiv Gandhi Grameen Vidyutikaran Yojana (RGGVY) works were awarded under turnkey contracts to reputed contractors during after inviting open tenders for erection of 33/11kV substations, 33kV lines, 11kV lines, LT lines and erection of distribution transformer stations of various capacities. Tenders were called item wise separately for supply of materials and erection charges. The costs at which the works were awarded are either less or above estimated costs as the rates quoted are based on the terrain, distance and area where the works are to be executed. The same procedure is being continued during also. As these are the actual executed costs, these costs can be compared with cost data estimates and can be considered for bench marking. This is discussed in detail in Chapter-5. The cost estimates, estimates prepared by them based on latest cost data and works as executed have been verified and found that the completion costs vary about ± 0 to 15% on the cost estimate. The costs as obtained and validated for each element of distribution business are discussed below: 58

69 (i) 33kV, 11kV and LT lines The utility manages only 33kV, 11kV and LT overhead network. Underground cable lines are provided at railway crossings only. The construction of the lines is generally awarded as partial turnkey contracts with the utility supplying all major materials such as conductor, poles, insulators etc. (a) 33kV lines The utility has standardized the construction of 33kV overhead lines on 9 meter PCC/ 12.8 Meter Rail Poles with 100 mm 2 ACSR / AAAC (maximum span = 100 meter). The utility prepared cost data updated upto and the utility is erecting 33kV lines mainly with 100 mm 2 ACSR on 9 meter PCC poles. The costs per Km of line as obtained from the utility are given in Table 4.65 below: Table 4.65 Costs of 33kV lines ( Rs. Lakh/ Km) S.N Item Cost obtained / validated Erection of 33kV line with 100 mm 2 ACSR over 9 meter PCC poles (Max span 100 meter) It is observed that generally the accounts for completed works do not cover all items of work and do not fully reflect the cost in number of cases. In such cases the cost of such materials as per cost data or as per procurement cost is taken for validation. Rail poles are used mainly in urban areas where both 33kV & 11kV and some times LT lines also are to be strung on the same supports. 100 mm 2 AAAC is also used as it is comparatively cheaper than 100 mm 2 ACSR. The cost of 33kV line using rail poles and 100 mm 2 AAAC are as furnished below: (Rs. lakhs/km.) 1. Erection of 33kV line with 100 mm 2 ACSR on meter Rail poles with maximum span of 100 meter (as per cost data of ) 2. Erection of 33kV line with 100 mm 2 AAAC on 9 meter PCC pole with maximum span of 100 meter (as per cost data of )

70 During , erection of 33kV lines with 100 mm 2 ACSR on 9 meter PCC poles are awarded on turnkey contracts. The cost per Km of line awarded under some packages in some districts are as given in Table-4.66 below: Table-4.66 Costs as per Turn Key Contracts (Rs. lakhs/km) S.N District Cost Material Labour Total 1 Birbhum Purbamidnapur Hoogly Malda Raghunathganj-II Block Coochbehar Average cost = 4.16 The comparative costs as per cost data and as per turnkey contract are given below: (Rs.lakh/km) Cost with Cost as per turnkey contract As per cost S. 10% Item data during N escalation Minimum Maximum kV line with 100 mm 2 ACSR on 9M PCC poles (Max span 100 M) for The variation in cost is due to transport of materials and erection of lines in difficult terrain. As the cost as per turnkey contract is the actual executed cost during these costs can be considered for bench marking the cost of 33kV lines in WBSEDCL. (b) 11kV lines The utility has standardized the construction of 11kV overhead lines as furnished below: (i) 11kV line with 50 mm 2 ACSR on 8 meter PCC poles with 75 meter span in plain area. (ii) 11kV line with 50 mm 2 AAAC on 8 meter PCC poles with 75 meter span in plain area. (iii) 11kV line with 30 mm 2 ACSR on 8 meter PCC poles with 100 meter span in plain area. (iv) 11kV line with 30 mm 2 AAAC on 8 meter PCC poles with 100 meter span in plain area. (v) 11kV line with 50 mm 2 ACSR on steel tubular poles with 75 meter span in hilly area. (vi) 11kV line with 30 mm 2 ACSR on steel tubular poles with 75 meter span in hilly area. 60

71 The utility is erecting the 11kV lines mainly with 50 and 30 mm 2 ACSR on 8 meter poles with a maximum span of 75 meter and 95 meter respectively. The costs of 1 Km of 11kV line as obtained from the utility are given in Table 4.67 below: Table-4.67 Costs of 11kV Lines (Rs. lakh/km) S.N Item Cost obtained / validated kV line with 50 mm 2 ACSR on 8 meter PCC poles (Max span 75 meter) 2. 11kV line with 30 mm 2 ACSR on 8 meter PCC poles (Max span 100 meter) The cost of other types of 11kV overhead lines as per cost data of are also furnished below: (Rs. lakh/km) 1. 11kV line with 50 mm 2 AAAC on 8 meter PCC poles in plain 1.98 area (Max span 75 meter) 2. 11kV line with 30 mm 2 AAAC on 8 meter PCC poles in plain 1.43 area (Max span 100 meter) 3. 11kV line with 50 mm 2 ACSR on steel tubular poles in hilly 2.90 area (Max span 75 meter) 4. 11kV line with 30 mm 2 ACSR on steel tubular poles in hilly area (Max span 75 meter) 2.47 During , erection of 11kV lines mainly with 50 mm 2 and 30 mm 2 ACSR on 8 meter PCC poles and at some places in Howrah dt, erection of 11kV line with 3X95 + 1X180 mm 2 AB cable are awarded as turnkey contracts. The costs per Km. lines awarded under some packages in some districts are as given in Table 4.68 below: Table kV line with 50 mm 2 ACSR (Rs. lakh/km) Cost S.N District Material Labour Total 1 Purbamidnapur Hoogly Birbhum Malda Raghunathganj-II Block

72 11kV line with 30 mm 2 ACSR (Rs. lakh/km) S.N District Cost Material Labour Total 1 Jalpaiguri Paraganas (South) Bardhman Hoogly Birbhum Coochbehar Birbhum Howrah The comparative costs as per cost data and as per turnkey contract are given below: (Rs. lakh/km) S.N Item cost with Cost as per turnkey As per cost 10% contract data during escalation for Minimum Maximum kV line with 50 mm ACSR (Max span 75 meter) 2 11kV line with 30 mm ACSR on 8M poles (Max span 95 meter) 3 11kV line with AB cable (Max span 55 meter) The variation may be due to transportation and erection in difficult terrains and sensitive areas. These are completion costs during and so these costs can be considered for bench marking of erection of 11kV lines in WBSEDCL. (c) LT Lines The utility has standardized the following norms for construction of low & medium voltage (LT & MV) overhead lines. (i) 3Ph 4wire line with 50 mm 2 AAAC on 8 meter PCC poles in plain area with 65 meter span. (ii) 3Ph 4wire line with 25 mm 2 AAAC on 8 meter PCC poles in plain area with 60 meter span. (iii) 3Ph 4wire line with 20 mm 2 ACSR on 8 meter PCC poles in plain area with 95 meter span (For STW). (iv) 1Ph 2 wire line with 25 mm 2 AAAC on 8 meter pole PCC poles in plain area with 45 meter span plain area. (v) 3Ph 4wire line with 25 mm 2 AAAC on 9 meter steel tubular poles in hilly area with 45 meter span. (vi) 1Ph 2 wire line with 25 mm 2 AAAC on steel tubular poles in hilly area with 45 meter span. 62

73 The utility is erecting LT lines mainly with 25 mm 2 AAAC and 20 mm 2 ACSR over 8 meter PCC poles. The costs per KM of LT lines as obtained from the utility are given in Table 4.69 below: Table 4.69 Costs of LT lines (Rs. lakh/km) S.N Item Cost obtained / validated Ph 4wire line with 25 mm 2 AAAC on meter PCC poles (Max span 45 meter) 2 3Ph 4wire line with 20 mm 2 ACSR on 8 meter PCC poles (Max span 85 meter) The costs of construction of other types of LT lines are also given below: (Rs. lakh/km) 1 3Ph 4wire line with 50 mm 2 AAAC on 8 meter PCC poles 2.73 in plain area (Max span 45 meter) 2 1Ph 2wire line with 25 mm 2 AAAC on 8 meter poles on 1.65 PCC in plain area (Max span 45 meter). 3 3Ph 4wire line with 25 mm 2 AAAC on steel tubular poles 2.96 in hilly area (Max span 45 meter). 4 1Ph 3 wire line with 25 mm 2 AAAC on steel tubular poles on hilly area (Max span 45 meter) During erection of LT lines is standardized with 25 mm 2 AAAC and works were awarded on turnkey contract for erection of LT 3 Ph 4wire and LT 1Phase 2 wire lines on 8 meter poles with 45 meters span. The costs per km of line awarded under some packages in some districts are given in Table 4.70 below: Table 4.70 LT 3Ph 4wire line with 25 mm 2 AAAC (Rs. lakh/km) S.N District Cost Material Labour Total 1 Bardhman Birbhum Hoogly Coochbehar Paraganas (South) Birbhum Howrah

74 LT 1Ph 2 wire line with 25 mm 2 AAAC (Rs. lakh/km) S.N District Cost Material Labour Total 1 Bardhman Birbhum Hoogly Coochbehar Paraganas (South) Birbhum Howrah The costs as per turnkey contract are the completion costs during and so these costs can be considered for benchmarking of erection of LT lines. (ii) 33/11kV Substations The WBSEDCL has standardized the substations with the following transformer capacities and 11kV outgoing feeders. (i) with 2Nos. 3.15MVA power transformers and 4 Nos. 11kV feeders. (ii) with 2Nos. 6.3 MVA power transformers and 6 Nos. 11kV feeders. Substations are out door spread out type. Power transformers are provided with one 33kV group control vacuum circuit breaker. Substation layout is also standardized. The 33kV system is erected outdoor and the 11kV system inside the control room. 11kV switchgear-vcb, 7 or 9 panel (2 incoming, 1 bus coupler, 4 or 6 outgoing feeders) with CTs, PT, relays and metering are provided. Capacitor banks are not provided at 33/11kV substations. Spacious control room with separate rooms for battery charger, stores, staff room, rest room etc., are provided. Substation costs as obtained from the utility are given in Table 4.71 below: Table /11kV substation costs (Rs. in lakhs) S.N Item Cost obtained /11kV substation with 2X3.15 MVA transformers and with 4 Nos. 11kV outgoing feeders 2 33/11kV substation with 2X6.3 MVA transformers and with 6 Nos. 11kV outgoing feeders

75 The break-up of above costs of 33/11kV substation i.e (i) land (ii) civil works (iii) equipment and materials and (iv) overheads are given in Table 4.72 below: Table 4.72 Costs break-up of 33/11kV Substation (Rs. in lakhs) S.N Item X6.3MVA 2X3.15MVA 1 Land Civil works including control room Equipment and materials Labour charges for erection and commissioning 5 Over heads such as contingencies, establishment, supervision charges etc Total During , under RGGVY scheme, erection of 33/11kV substations is awarded under turnkey contract. Most of the substations are with 2X3.15 MVA transformers. The costs of works awarded under some packages in some districts are as given in Table 4.73 below Table /11kV substation costs with 2X3.15 MVA transformers on turnkey contracts (Rs. in lakhs) S.N District Cost Material Labour Civil works Total 1 Purbamidnapur Birbhum Coochbehar Hoogly Malda Raghunathganj-II Block Design and erection of substation is good but costs are high. Control room appears to be much more than the requirement. Control room is provided with four rooms, one each for stores, staff, toilets and staircase. As more number of 33/11kV substations are going to be constructed under RGGVY scheme mostly in rural areas, it may be economical to simplify the design of substation so that less land i.e about ½ acre instead of 1.5 acre, (land is said to be costly at about 20 to 30 lakhs per acre) and also simplify the control room to be a smaller one. As the above costs as per turnkey contract are the actual completion costs during and still being executed during also, these costs can be considered 65

76 for benchmarking. But some of the civil works such as land development; approach roads etc may not be necessary at all the substations. (iii) Distribution Transformer stations The utility installs three phase distribution transformers of capacities 10KVA, 25 KVA, 63KVA, 100 KVA and 315 KVA. The transformers are erected on double pole structures. Some times 100 KVA or 315 MVA transformers are erected on four pole structures. The cost of distribution transformer stations with different capacity transformers including structure, etc., as obtained from the utility are given in Table-4.74 below: Table-4.74 Costs of distribution transformer stations (Rs. in lakh/each) S.N Item Cost as obtained /0.4kV 10 KVA distribution transformer stations 2 11/0.4kV 25 KVA distribution transformer stations 3 11/0.4kV 63 KVA distribution transformer stations 4 11/0.4kV 100 KVA distribution transformer stations During , the utility awarded, erection of 11/0.4kV, 10 KVA and 25 KVA distribution transformer stations on 8 meter PSC pole DPs on turnkey contracts. The costs awarded under some packages in some districts as obtained are as given below in Table Table Costs of distribution transformer stations (Rs. in lakh/each) S.N District Cost 10 KVA Transformer 25 KVA Transformer 1 Coochbehar Howrah Birbhum Birbhum Bardman Paraganas (South) Hoogly Jalpaiguri The above are the completion costs during and be continuing during also. 66

77 (iv) Metering Equipment The costs of metering sets and meters as installed for different categories of consumers as obtained from the utility are given in Table 4.76 below. The utility installs only static meters of different capacities. Table 4.76 Costs of Meter equipment and meters (Rs. each) S.N Item Cost Indoor type metering switchgear with VCB and 3-5,47,000 phase PT and single phase CTs. 2 AC 3Ph, static trivector meter Ph 4 wire LT static whole current meter A (TOD meter) 4 3Ph 4 wire LT static whole current meter 5-30A Ph 2 wire LT static whole current meter 5-30A (v) Service Line Costs The service line costs are standardized for agricultural pumpsets. The metering equipment will be borne by the DISCOM and the cost of balance materials required for the service connection has to be borne by the consumer. The standard estimate costs of pump connection are given in Table-4.77 below: Table-4.77 Service Line Costs (In Rs.) S.N Type of pump connection Estimate cost Consumer side DISCOM side Total 1 DTW pump connection RLI pump connection STW connection The service line costs for other service connections are worked out in individual cases based on the costs. Cost of Line up-to the Terminal Pole (service pole), if required as per survey, has to be borne by the consumer as per cost data of relevant year of WBSEDCL. From terminal pole, cost of service connection up-to meter is borne by WBSEDCL and cost of service connection beyond meters is collected from the consumer. The costs of service connection for 1phase and 3phase, domestic, non domestic and industrial service connections are as given below: 67

78 Sl.No. Item Cost in Rs. (i) Service Connection Cost of LT domestic service: a) Single Phase Rs Rs 1249 /- (cost of 1ph meter cost with PP box) b) Three Phase Rs Rs 9170 /- (cost of 3ph meter) (ii) Service Connection Cost of LT Industrial and Commercial service: a) With 3 phase whole current meter Rs /- + Rs 9418 /- (cost of 3ph meter) b) With CTs meter Service connection not given with CT meter (iii) Service connection Cost of 11 KV HT Industrial and Commercial service connection : a) With series Trip meter (for consumers having contract demand up-to 120 KVA) Rs 86,620 /- + Rs 16,784 /- (cost of LT CT meter including cost of CT) b) With series Trip metering Switch gear (for consumers having contract demand beyond 120 KVA) Rs 5,47,000 /- + Rs 9170 /- (cost of CT Operated 11 KV HT TVM with TOD, Accuracy Class 0.5) c) With series Trip Ring Main Switch-gear (for consumers having contract demand beyond 120 KVA) Rs 12,72,000 /- + Rs 9170 /- (cost of CT Operated 11 KV HT TVM with TOD, Accuracy Class 0.5) 68

79 10. Central Assam Electricity Distribution Company Limited (CAEDCL) 11. Upper Assam Electricity Distribution Company Limited (UAEDCL) Though erstwhile Assam State Electricity Board (ASEB) was unbundled and three DISCOMs namely Central Assam Electricity Distribution Company Limited, Upper Assam Electricity Distribution Company Limited and Lower Assam Electricity Distribution Company Limited were established, all the three DISCOMs are functioning from the same premises in Guwahati. Inviting tenders for procurement of major materials, preparation of cost data for various elements of rural electrification works and inviting tenders for RGGVY works etc., are being done centrally by ASEB which continues to be a holding company and all the DISCOMs are adopting the same data for preparation of cost estimates or for awarding works. The State Government is planning to merge all the three DISCOMs into one viz., Assam State Electricity Distribution Company Limited (ASEDCL). The Rural Electrification wing of ASEB prepares cost data / cost estimates for various works such as construction of 33kV, 11kV & LT lines, 33/11kV substations, distribution transformer stations, etc., every year. The cost data is updated yearly based on the escalation in cost of equipment / material, labour charges, transport and other establishment charges. An addition of 15% on the total cost is provided for Karbi Anglong and North Coacher districts of Assam state because of communication and transportation bottlenecks in these two districts with hilly terrain, difficult working area, etc for RGGVY works. The cost data is taken as basis for preparation of estimates for various works and for award of contracts. From , under Rajiv Gandhi Grameen Vidyutikaran Yojana (RGGVY) for developing infrastructure in rural areas, works were awarded under turnkey contracts to reputed contractors after inviting tenders for construction of 33/11kV substations, 33kV, 11kV and LT lines, distribution transformer stations of various capacities. Tenders are invited item wise separately for supply of material and erection charges. The costs at which the works were awarded are either less or more than estimated costs as the rates quoted were based on the terrain, distance involved and other local factors where the works are to be executed. 69

80 As these are the actual executed costs, these costs can be considered for bench marking. This is discussed in detail in Chapter 5. The cost estimates prepared by the utility based on latest cost data and the completion costs of works as executed have been verified and found that the completion costs vary about ± 0 to 20% on the cost estimates. The costs as obtained / validated where required for each element of distribution business are discussed below: (i) 33 kv, 11 kv and LT Lines The utility manages only 33kV, 11kV and LT overhead network. (a) 33 kv Lines The utility has standardized the construction of 33kV lines with AAA Raccoon conductor with average span of 100 meters on 9.75 meter PSC poles (single pole type) and on 10 meter steel tubular poles (double pole suspension type). The utility is erecting 33kV lines mainly on 9.75 meter PSC poles with AAA Raccoon conductor. The costs per Km of line as obtained from the utility are given in Table 4.78 below: Table 4.78 Costs of 33kV Line (in Rs. lakh/ Km) S.N Item Cost obtained/validated kV line with AAA Raccoon conductor on 9.75 meter PSC poles (single pole type) with average span of 100 meters The cost per KM of 33kV line with AAA Raccoon conductor with a span of 100meters on 10 meters steel tubular poles (double pole suspension type) as per the cost data for is Rs lakhs and for is Rs lakhs. During , erection of 33kV line with AAA Wolf conductor on 9.75 meter PSC poles (double pole suspension type) with an average span of 50 meters are also awarded on turnkey contract. The cost per km this line, awarded under some packages in some districts are as given below: 70

81 (In Rs.lakh/Km) S.N District Cost Material Labour Total 1 Tinsukia Dibrugarh (b) 11kV lines The utility has standardized the construction of 11kV lines as furnished below: (i) (ii) (iii) 11kV line with AAA Weasel conductor on 8.5 meter PSC poles with an average span of 100 meters. 11kV line with AAA Weasel conductor on 8.5 meter RS Joist poles with an average span of 100 meters. 11kV line with AAA Weasel conductor on 8.5 meter steel tubular poles with an average span of 100 meters. The utility is erecting the 11kV lines mainly with AAA Weasel conductor on 8.5 meter PSC poles with an average span of 100 meters. The cost per Km of 11kV line as obtained from the utility is given in Table 4.79 below: Table 4.79 Costs of 11kV lines (in Rs. lakhs/km) S.N Item Cost obtained / validated kV line with AAA Weasel conductor on 8.5 meter PSC pole (Average span 100 meter) The cost of other types of 11kV lines as per cost data of and are also furnished below: (in Rs. lakhs/km) kV line with AAA Weasel conductor on 8.5 meter RS Joist pole (Average span 100 meter) 2. 11kV line with AAA Weasel conductor on 8.5 meter steel tubular pole (Average span 100 meter) During , erection of 11kV lines with AAA Raccoon conductor on 9.75 meter PSC poles with average span of 50 meters are awarded on turnkey contracts. The costs per KM of line awarded under some packages in some districts are as given below: (in Rs. lakhs/km) S.N District Cost Material Labour Total 1 Tinsukia Dibrugarh

82 (c) LT lines The utility has standardized construction of 3phase 4 wire and 1phase 2 wire LT lines with AAA squirrel conductor at an average span of 50 meters on 7.5 meter PSC poles, RS Joists and steel tubular poles. The costs per Km of LT line as obtained from the utility are given in Table 4.80 below: Table 4.80 Costs of LT Lines (In Rs. Lakhs/Km) S.N Item Costs obtained Phase 4 wire LT line with AAA squirrel conductor on 7.5 meter PSC poles (Average span of 50 meters) 2 3Phase 4 wire LT line with AAA squirrel conductor on 7.5 meter RS Joists (Average span of 50 meters) 3 3Phase 4 wire LT line with AAA squirrel conductor on 7.5 meter steel tubular poles (Average span of 50 meters) 4 1Phase 2 wire LT line with AAA squirrel conductor on 7.5 meter PSC poles (Average span of 50 meters) 5 1Phase 2 wire LT line with AAA squirrel conductor on 7.5 meter RS Joists (Average span of 50 meters) 6 1Phase 2 wire LT line with AAA squirrel conductor on 7.5 meter steel tubular poles (Average span of 50 meters) (ii) 33/11kV Substations The utility has standardized the 33/11kV substations with the following transformer capacities (a) 1 No. 2.5 MVA power transformer (b) 1 No MVA power transformer (c) 2 Nos. 2.5 MVA power transformers The 33/11kV substations are outdoor type only. Power transformer(s) provided with 1 No. 33kV circuit breaker for HV side protection. 11kV indoor type switchgear with 9 unit VCB panel (2 incoming, 1 bus coupler, 6 outgoing) is provided for transformer LV and feeders protection at all substations. 9.75M PSC poles are used as structures. Capacitor banks are not provided. Control room of 120 Sq Meter is constructed. Staff quarters, stores, security office are constructed where necessary and where space is available. 72

83 The costs of the 33/11kV substations as obtained from the utility are given in Table below: Table / 11kV substation costs ( Rs. in lakhs) S.N Item Cost obtained / validated /11kV SS with 1X2.5 MVA power transformer /11kV SS with 2X2.5 MVA power transformer /11kV SS with 1X3.15 MVA power transformer The break-up of above costs of 33/11kv substation i.e (i) land (ii) civil works (iii) equipment and materials and (iv) overheads are as given below. Cost break-up of 33/11kV Substations (Rs. in lakhs) S.N Item Costs during X2.5 MVA 2X2.5 MVA 1X3.15 MVA 1 Land Civil works including control room Equipment and materials Labour charges Overheads such as contingencies on materials etc Total During erection of 33/11kV substations with 2X5.0 MVA power transformers are also awarded under RGGVY scheme on turnkey contract. The costs awarded under some packages in some of the districts are given below: 33/11kV substation costs with 2X5.0 MVA transformers on turnkey contract (Rs. in lakhs) S.N District Material Cost Labour Civil works Total 1 Tinsukia Diburgarh Bamunimaidan (iii) Distribution transformer stations The utility installs distribution transformer stations with transformer capacities of 25 KVA, 63 KVA and 100 KVA three phase and 16 KVA single-phase. The transformers are erected on double pole structures with 8.5 meter PSC poles or RS Joists. 73

84 The cost of distribution transformer stations with different capacity transformers including structure etc as obtained from the utility are given in Table 4.82 below: Table 4.82 Costs of Distribution Transformer Stations (Rs. in lakhs each) S.N Item Costs obtained / validated /0.433kV 25 KVA distribution transformer station on 8.5 meter PSC poles double pole structure 2. 11/0.433kV 63 KVA distribution transformer station on 8.5 meter PSC poles double pole structure 3. 11/0.433kV 100 KVA distribution transformer station on 8.5 meter PSC poles double pole structure /0.220kV single phase 16 KVA distribution transformer station on 8.5 meter PSC poles double pole structure During , the utility has also awarded erection of distribution transformer stations with capacities 25 KVA, 63 KVA and 100 KVA three phase transformers on turnkey contract. The costs per each transformer station under some packages in some of the districts are given below: Distribution transformer station costs on turnkey contract (in Rs. Lakhs/each) S.N District 25 KVA 63 KVA 100 KVA 250 KVA 1 Tinsukia Diburgarh (iv) Metering Equipment The costs of metering sets and meters as installed for different categories of consumers as obtained from the utility are given below. The utility installs only static meters of different capacities for LT consumers and trivector meters for HT consumers. The costs are given in Table 4.83 below: Table 4.83 Costs of metering sets and meters (In Rs.) S.N Details Costs as obtained kV CT/PT set Static trivector meter LT 3phase meter (CT type) LT 3phase meter (Electronic) LT single phase meter (Electronic)

85 (v) Service Lines The service line costs are standardized for single-phase installations upto 60W load to Below Poverty Line (BPL) rural household at Rs per each connection. The service line costs for other domestic, industrial and commercial services and HT consumers are worked out in individual cases based on the load length of line etc. The costs as obtained / validated are given in Table 4.84 below: Table-4.84 Service Lines Costs (Rs. each) S.N Details Service connections of domestic and non domestic (single phase) with electronic meters 2 Service connections of domestic and non domestic (three phase) with electronic meters 3 Service connections for industrial service (above 25 kva,ht)

86 12. Southern Electricity Supply Company of Orissa Ltd. (SOUTHCO) The distribution companies in Orissa manage 33 kv, 11 kv and LT network under distribution. The utility prepares cost data / cost estimates for various elements in distribution business 33/11 kv substations, distribution transformer stations, 33 kv, 11 kv and LT lines etc., and updates the data yearly based on input costs. The Orissa Electricity Regulatory Commission (OERC) has approved the cost data for different works of the distribution system in Subsequently every year the cost of various materials used for the cost data are approved by the Commission for adoption in the cost analysis. This cost data / cost analysis is adopted for preparation of estimates for works and award of contracts either on turnkey basis or on partial turnkey basis. The costs of various elements in distribution business are discussed below: (i) 33 kv, 11 kv and LT lines (overhead) The construction of lines is generally awarded on partial turnkey basis with major material supplied by the utility and the erection by the contractor along with supply of minor materials. The major works at present are carried out by M/s NTPC, NHPC and PGVCL under RGGVY programme. The distribution company is executing some works under system improvement and other schemes. (a) 33 kv lines (overhead) The utility has standardised the construction of 33 kv line with 100 mm 2 AAAC conductor on 9.1 meters PSCC poles with 100 and 70 meter spans in rural areas. In urban areas lines with 70 meter span length over 9.1 meter PSCC poles is generally adopted. 33 kv UG cable works are not carried out by the utility in the recent years. The cost per km of line as obtained from the utility and validated are given in Table below: 76

87 Sl.No. Table-4.85 Costs of 33 kv Lines (Overhead) (Rs. In lakhs/km) Costs obtained / validated Details kv line with 100 mm 2 AAAC over 9.1 meter PSCC poles with 100 meter span 2 33 kv line with 100 mm 2 AAAC over 9.1 meter PSCC poles with 70 meter span (b) 11 kv Overhead Lines The utility adopts the following norms for construction of 11 kv lines: 11 kv line with 34 mm 2 and 55 mm 2 AAAC on 9.0 and 8.0 meter supports with 100 and 70 meter spans. Lines with 80 mm 2 AAAC are also constructed for some 11 kv overloaded lines. Cost data is also available with 9 meter long 100X 116 mm RS joists. The line with 70 meters span is most common. No underground cable works for 11 kv lines are carried in the utility except for the railway crossings. The costs of 11 kv overhead lines as obtained / validated are given in Table-4.86 below: Table-4.86 Costs of 11 kv Overhead Lines (Rs. In lakh/km) Sl. Costs obtained / validated Details No kv line with 55 mm 2 AAAC with 100 meter span over 8 meter PSCC poles 2 11 kv line with 55 mm 2 AAAC with 70 meter span over 9.0 meter PSCC poles 3 11 kv line with 34 mm 2 AAAC with 100 meter span over 8 meter PSCC poles 4 11 kv line with 34 mm 2 AAAC with 70 meter span over 9.0 meter PSCC poles (c) LT Overhead Lines The utility adopts the following norms for construction of LT lines (i) 3 phase 5 wire line with 3x55 mm 2 + 2x34 mm 2 AAAC on 8.0 meter PSCC poles with 50 meter span. (ii) 3 phase 5 wire line with 5x34 mm 2 AAAC on 8.0 meter PSCC poles with 50 meter span. 77

88 (iii) 3 phase 4 wire line with 4X55 mm 2 AAAC over 8.0 meter PSCC poles with 50 meter span (iv) 3 phase 4 wire line with 4x34 mm 2 AAAC over 8.0 meter PSCC poles with 50 meter span. (v) Single phase 3 wire line with 3x34 mm 2 AAAC over 8.0 meter PSCC poles with 50 meter span. (vi) Single phase 2 wire line with 2x34 mm 2 AAAC over 8.0 meter PSCC poles with 60 meter and 65 meter span The usage of the above LT lines is as below: (i) 3 phase 5 wire with 55 mm 2 AAAC (ii) 3 phase 5 wire with 34 mm 2 AAAC (iii) 3 phase 4 wire with 3x55 mm mm 2 AAAC (iv) 3 phase 4 wire with 4x34 mm 2 AAAC (v) Single phase 3 wire line with 34mm 2 Urban areas for 3 phase supply (4 wires) and for street light supply (5 th wire). Rural areas for 3 phase supply (4 wires) and for street light supply (5 th wire). For supply to Agricultural pump sets and other loads 3 phase loads. For agricultural pumpsets and other 3 phase loads. For single phase supply loads (2 wire) and street light (3 rd wire). Used in urban and rural areas with single phase loads and street light connections. (vi) Single phase 2 wire line with 34 mm 2 For single phase supply for residential / commercial loads. The costs of LT overhead lines being commonly constructed by the utility are given in Table-4.87 below: Table-4.87 Costs of LT Overhead Lines (Rs. In lakh/km) Sl. Details Costs obtained / validated No LT 3 phase 5 wire line with 5x34mm 2 AAAC with 50 meter span over 8 meter PSCC poles. 2 LT 3 phase 4 wire line with 4x55 mm 2 AAAC with 50 meter span over 8 meter PSCC poles. 3 LT 4 wire line with 3x35 mm 2 + 1x25mm 2 AB cable with 35 meter span over 8 meter PSCC poles. 4 LT Single phase 3 wire line with 3x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles

89 (ii) 33 / 11 kv Substations (Receiving stations) The utility has standardised the transformer capacities and the number of 11 kv outgoing feeders etc., at the 33/11 kv substations. The number of substations installed in the past few years is limited. The substations are erected in rural area with 1x3.15 MVA transformer initially and additional transformers added based on load development. The transformer capacity of the substations in Urban area are 1x5 MVA or 2x3.15 MVA. Outdoor Substations The costs of 33/11 kv outdoor substations being installed by the utility are given in Table-4.88 below: Table-4.88 Costs of 33/11 kv Substation (Outdoor) (Rs. In lakhs) Costs as obtained / Sl. Details validated No /11 kv substations with 1x3.15MVA Transformers with 3 Nos. outgoing 11 kv feeders 2 33/11 kv substation with 1x5 MVA transformer and 3 Nos. outgoing 11 kv feeders 3 33/11 kv substations with 2x3.15 MVA transformers with 3 Nos. 11 kv outgoing feeders The costs with one 3.15 /5.0 MVA transformer are without 33 kv circuit breaker on 33 kv side of transformer. For the substation under item-3, a group control 33 kv CB is provided on HV side of power transformers. The power transformers are protected on the 11 kv side and the 11 kv feeders with individual control breakers. The substations in the rural areas are provided with small control rooms. In urban areas, with more than one power transformer and 33 kv breaker control is provided and large size control room is built. The break-up costs for 33/11 kv substations for (i) Land (ii) Civil works and building etc., (iii) Equipment cost including structures, foundation, cabling and (iv) contingencies, labour and establishment charges etc., are as given in Table-4.89 below: 79

90 Table-4.89 Break-up Costs for 33/11 kv Substations (Rs. In lakhs) Break-up Costs Sl. No. Details 1 33/11 kv substations with 1x3.15MVA transformer with 3 Nos. outgoing 11 kv feeder i) Land ii) Civil works iii) Equipment costs etc. including capacitor bank iv) Contingencies, labour and establishment Total /11 kv substation with 1x5 MVA transformer and 3 Nos. outgoing 11 kv feeders i) Land ii) Civil works iii) Equipment costs etc. including capacitor bank iv) Contingencies, labour and establishment Total /11 kv substations with 2x3.15 MVA transformers with 3 Nos. 11 kv outdoing feeders. i) Land ii) Civil works iii) Equipment costs etc. including capacitor bank iv) Contingencies, labour and establishment Total Note: (i) (ii) (iii) The utility made a provision Rs.2.5 lakhs in the cost analysis towards cost of land which is usually one acre. This generally varies depending upon the market value of the land in the location concerned. The equipment costs under (3) are high as the provision is for 2x3.15 MVA transformers instead of 1x3.15 MVA with HV control breaker etc. No indoor 33/11kv S.S are being constructed by the utility. (iii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25 kva, 63 kva, 100 kva three phase and 16 kva single phase. The CSP distribution transformers with CRGO core are used by the utility. Transformers with amorphous core are proposed to be utilised by the company in future. The costs of installation of distribution transformer stations including cost of structure, cabling, fuse control etc. as furnished by the utility are given in Table-4.90 below: 80

91 Sl. No. Table-4.90 Costs of Distribution Transformer Stations (Rs. In lakhs/each) Costs obtained / validated Details Three Phase 11 kv/433 V Transformer stations 1 25 kva kva kva Single Phase 6.6 kv/230 V Transformer stations 4 15 kva/16 kva The costs of 63 kva and 16 kva transformer stations in are less than due to lower cost of the transformers procured. (iv) Metering Equipment and Meters The costs of metering equipment and meters being installed by the utility are given in Table-4.91 below: Table-4.91 Costs of Meter Equipment and Meters (Rs. ) Sl. Costs obtained / validated Details No kv CT PT HT metering kv CT/PT set for HT metering HT trivector meter LT 3 Phase meter LT single phase meter The utility provides only static meters to all consumers. (v) Service Line Costs The service line costs for various class of consumers as provided by the utility are given in Table4.92 below: Table-4.92 Service Line Costs (Rs.) Sl.No. Details Costs Single Phase service for domestic / non-domestic with electronic meter 2 Three phase service for domestic / non-domestic with 13,040 13,120 electronic meter 3 Three phase agricultural service with meter Industrial service above 20 HP with LT Trivector meter Street light service LT Trivector meter erected on LV side of DTR, The benchmark costs for all components of Distribution Business are discussed in Chapter-5 81

92 13. Central Electricity Supply Utility of Orissa (CESU) The distribution companies in Orissa manage 33 kv, 11 kv and LT systems under distribution. The utility prepares cost data / cost estimates for various elements in distribution business 33/11 kv substations, distribution transformer stations, 33 kv, 11 kv and LT lines etc., and updates the data yearly based on input costs. The Orissa Electricity Regulatory Commission (OERC) has approved the cost data for different works of the distribution system in Subsequently every year the cost of various materials used for the cost data are approved by the Commission for adoption in the cost analysis. This cost data / cost analysis is adopted for preparation of estimates for works and award of contracts either on turnkey basis or on partial turnkey basis. The costs of various elements in distribution business are discussed below: (i) 33 kv, 11 kv and LT Lines (overhead) The construction of lines is generally awarded on partial turnkey basis with major materials supplied by the utility and the erection by the contractor along with supply of minor materials. The major works including erection of 33 kv substations are presently carried out by M/s NTPC, NHPC and PGVCL under RGGVY programme. The distribution company is executing some works under system improvement and other schemes. (a) 33 kv lines (overhead) The utility has standardised the construction of 33 kv line with 100 mm 2 AAAC on 9.1 meter PSCC poles with 100 and 70 meter spans. In both rural and urban areas lines with 70 meter span length over 9.1 meter PSCC poles is generally adopted. The cost per km of line as obtained from the utility / validated are as below: The costs of 33 kv lines as being constructed by the utility are given in Table below: 82

93 Table Costs of 33 kv lines (Overhead) (Rs. In lakhs/km) Sl.No. Details Costs obtained / validated kv line with 100 mm 2 AAAC over 9.0 meter PSCC poles with 100 meter span 2 33 kv line with 100 mm 2 AAA conductors over 9.0 meter PSCC poles with 70 meter span (b) 33 kv Underground System: 33 kv underground cable system is executed in the cities wherever the laying of overhead lines is not possible. The size of the cable standardised is single core 300 mm 2 XLPE cable. The costs of underground cable system as obtained from the utility are given in Table below. Table Costs of Underground Cable system (Rs.in lakhs/km. S.No Details Costs as Obtained / Validated i) 33 kv underground cable line with single core mm 2 XLPE (3 circuits) ii) Road restoration charges Total The above work is carried out on Turnkey contract basis. The major items that influence the cost are the rate per km. of the cable, the type of soil and the road restoration etc. (c)11 kv Overhead Lines The utility adopts the following norms for construction of 11 kv line: 11 kv lines are constructed with 34 mm 2 and 55 mm 2 AAAC on 8.0 meter supports with 100 and 70 meter spans. Lines with 80 mm 2 AAAC are also constructed wherever required. Cost analysis is also available for lines with 9 meter long 100X 116 mm RS joists. The line with 70 meter span is most common. U.G cable works for 11 kv lines are carried in the utility in the areas where laying of overhead lines is not possible. The costs of 11 kv overhead lines as obtained / validated are given in Table-4.95 below: 83

94 Sl. No. Table-4.95 Costs of 11 kv Overhead Lines (Rs. In lakhs/km) Costs obtained / validated Details kv line with 55 mm 2 AAA Conductor with 100 meter span over 8 meter PSCC poles 2 11 kv line with 55 mm 2 AAAC with 70 meter span over 8.0 meter PSCC poles 3 11 kv line with 34 mm 2 AAAC with 100 meter span over 8 meter PSCC poles 4 11 kv line with 34 mm 2 AAAC with 70 meter span over 8.0 meter PSCC poles 5 11 kv line with 80 mm 2 AAAC with 70 meter span over 8 meter PSCC poles (c) LT Overhead Lines The utility adopts the following norms for construction of LT lines (i) LT 3 phase 5 wire line with 3x55 mm 2 + 2x34 mm 2 AAAC on 8.0 meter PSCC poles / 7.5 meter RS Joists with 50 meter span. (ii) LT 3 phase 5 wire line with 5x34 mm 2 AAAC on 8.0 meter PSCC poles/7.5 meter RS Joists with 50 meter span. (iii) 3 phase 4 wire line with 4X55 mm 2 AAAC over 8.0 meter PSCC poles /7.5 meter RS Joists with 50 meter span. (iv) 3 phase 4 wire line with 4x34 mm 2 AAAC over 8.0 meter PSCC poles/7.5 meter RS Joists with 50 meter span. (v) Single phase 3 wire line with 3x34 mm 2 AAAC over 8.0 meter PSCC poles/7.5 meter RS Joists with 50 meter span. (vi) Single phase 2 wire line with 2x34 mm 2 AAAC over 8.0 meter PSCC poles/7.5 meter RS Joists with 60 meter and 65 meter spans. The usage of the above LT lines is as below: (i) 3 phase 5 wire with 55 mm 2 AAAC conductor Urban areas for 3 phase supply (4 wires) and for street light supply (5 th wire). (ii) 3 phase 5 wire with 34 mm 2 AAAC Rural areas for 3 phase supply (4 wires) and for street light supply (5 th wire). (iii) 3 phase 4 wire with 3x55 mm 2 + For supply to Agricultural pump sets and other 34mm 2 AAAC 3 phase loads. (iv) 3 phase 4 wire with 4x34 mm 2 AAAC For agricultural pumpsets and other 3 phase loads. (v) LT single phase 3 wire line with 34mm 2 For single phase supply loads (2 wire) and street light (3 rd wire). Used in urban and rural areas with single phase loads and street light connections. (vi) LT single phase 2 wire line with 34 For single phase supply for residential / mm 2 commercial loads. 84

95 The costs of LT overhead lines being commonly constructed by the utility are given in Table-4.96 below: Table-4.96 Costs of LT Overhead Lines (Rs. In lakhs/km) Sl. Details Costs obtained / validated No LT 3 phase 4 wire line with 3x55 mm 2 + 1x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 2 LT 3 phase 4 wire line with 4x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 3 LT Single phase 3 wire line with 3x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 4 LT Single phase 2 wire line with 2x34 mm 2 AAAC with 50 meter span over 8 meter PSCC poles 5 LT 4 wire line with 3x35 mm 2 + 1x25 mm 2 AB cable with 50 meter span over 8 meter PSCC poles 6 LT 4 wire line with 3x35 mm 2 + 1x25 mm 2 AB cable with 50 meter span over 125x75 mm RS Joist (ii) 33 / 11 kv Substations (Receiving stations) The utility has standardised the transformer capacities and the number of 11 kv outgoing feeders etc., at the 33/11 kv substations. The number of substations constructed in the past few years is limited. The substation is constructed in rural area with 1x3.15 MVA or 1x5 MVA transformer initially and additional transformers added based on load development. The transformer capacity of the substations in urban area are 2x5 MVA or 2x8 MVA. Outdoor Substations The costs of 33/11 kv outdoor substations being installed by the utility are given in Table-4.97 below: Table-4.97 Costs of 33/11 kv Substation (Outdoor) (Rs. In lakhs) Costs as obtained / Sl. Details validated No /11 kv substations with 1x3.15 MVA Transformer with 3 Nos. outgoing 11 kv feeders 2 33/11 kv substation with 1x5 MVA transformer and Nos. outgoing 11 kv feeders 3 33/11 kv substations with 2x8 MVA transformers with 5 Nos. 11 KV outgoing feeders with indoor 11 kv control panel board No land costs included in the data of

96 The costs with 3.15 or 5 MVA transformers are without 33 kv circuit breaker on 33 kv side of transformers and without capacitor bank. For the substation under item-3, individual 33 kv CBs are provided on HV side of power transformers. The power transformers are protected on the 11 kv side and the 11 kv feeders through the indoor 11 kv switchgear control board. Capacitor banks are not provided in the new substations. The substations in the rural areas are provided with small control rooms. In urban areas, with more than one power transformer and 33 kv breaker control fairly large control room is built. The break-up costs for 33/11 kv substation for (i) Land (ii) civil works and building etc., (iii) Equipment cost including structures, foundations, cabling and (iv) contingencies, labour and establishment charges etc., are given in Table-4.98 below: Table-4.98 Break-up Costs for 33/11 kv Substations (Rs. In lakhs) Sl. Break-up Costs Details No /11 kv substations with 1x3.15MVA transformer with 3 Nos. outgoing 11 kv feeder i) Land 2.00 ii) Building and other civil works iii) Equipment costs etc iv) Contingencies, labour and establishment Total /11 kv substation with 1x5 MVA transformer and 3 Nos. outgoing 11 kv feeders i) Land 2.00 ii) Building and other civil works iii) Equipment costs etc iv) Contingencies, labour and establishment Total /11 kv substations with 2x8 MVA transformers with 5 Nos. 11 kv outgoing feeders and indoor 11 kv panel board i) Land ii) Building and other civil works iii) Equipment costs etc iv) Contingencies, labour and establishment Total Note: i The land for the Substation is usually one acre and the cost generally varies depending on the market value of the land in the location concerned. ii The equipment costs under (3) are high as the provision is made for 2x8 MVA power transformers with individual HV control breakers and 11 kv indoor switchgear panel for transformer LV and feeder control. 86

97 (ii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25 kva, 63 kva, 100 kva three phase and 16 kva single phase. The CSP distribution transformers with CRGO core are used by the utility. Transformers with amorphous core are proposed to be utilised by the utility in future. The costs of installation of distribution transformer stations including cost of structure, cabling, fuse control etc. as furnished by the utility / validated are given in Table-4.99 below: Sl. No. Details Table-4.99 Costs of Distribution Transformer Stations (Rs. In lakhs/each) Costs obtained / validated Three Phase 11 kv/433 V Transformer Stations 1 25 kva kva kva Single Phase 6.6 kv/433 V Transformer Station 4 15 kva/16 kva (iv) Metering Equipment and Meters The costs of metering equipment and meters being installed by the utility are given in Table below: Table Cost of Meter Equipment and Meters (Rs. ) Sl. Details Costs obtained / validated No kv CT PT HT metering kv CT/PT set for HT metering HT trivector meter LT 3 Phase meter LT single phase meter 402/ /826 The utility provides only static meters to all consumers. 87

98 (v) Service Line Costs The service line costs for various class of consumers as provided by the utility are given in Table below: Table Service Line Costs (Rs.) Sl.No. Details Costs Single Phase service for domestic / non-domestic with electronic meter 2 Three phase service for domestic / non-domestic with electronic meter 3 Three phase agricultural service with meter Industrial service upto 20 HP Industrial service above 20 HP with LT Trivector meter Street light service LT Trivector meter erected on LV side of DTR, The benchmark costs for all components of Distribution Business are discussed in Chapter-5. 88

99 14. Punjab State Electricity Board (PSEB) The Punjab State Electricity Board is an integrated utility managing Generation, Transmission and Distribution of electricity in the State. The transmission and distribution voltages are 400 kv, 220 kv, 132 kv, 66 kv, 11 kv and LT (400 V). When the State Electricity Board is unbundled on functional basis the 11 kv and LT voltages are likely to come under distribution management as in the case of Kanataka and Gujarat. In Delhi, however, the 66 kv voltage is under distribution companies. In PSEB, 66 kv is also considered under distribution and 66 kv, 11 kv and LT are considered as distribution voltages to benchmark costs. The 33/11 kv lines and substations are executed upto only. Now the PSEB is upgrading the 33 kv system to 66 kv system. There are no indoor stations in PSEB. Most of the works are being executed departmentally. The costs obtained from PSEB for various elements of distribution business are discussed below: (i) 66 kv, 11 kv and LT Lines (Overhead) (a) 66 kv Lines (Overhead) The utility constructs 66 kv single circuit and double circuit lines on towers with Panther (200 mm 2 ) ACSR and Wolf (150 mm 2 ) ACSR with spans varying from 250 Mts to 300 Mts. The costs of 66 kv single circuit (SC) and double circuit (DC) lines on single and double circuit towers as obtained from PSEB / validated are given in Table below: Table Costs of 66 kv lines (Overhead) (Rs. in lakhs/km) Sl. No. Details 1 66 kv SC line on single circuit towers with 200 mm 2 ACSR ( panther ) with 300 meters span 2 66 kv SC line on double circuit towers with 200 mm 2 ACSR ( panther ) with 250 meters span 3 66 kv DC line on DC towers with 200 mm 2 ACSR ( panther ) with 250 meters span kv SC line on single circuit towers with 150 mm 2 ACSR ( Wolf ) with 300 meters span kv SC line on DC towers with 150 mm 2 ACSR ( Wolf ) with 250 meters span kv DC line on DC towers with 150 mm 2 ACSR ( Wolf ) with 250 meters span. Costs as obtained / validated

100 (b) 11 kv lines (overhead) The 11 kv lines are being constructed by PSEB with different sizes of conductor i.e. 80 mm 2, 50 mm 2, and 30 mm 2 ACSR on 8 meter and 9 meter PCC supports with spans varying from 50 meter to 70 meter. The costs of 11 kv overhead lines as obtained from the utility / validated are given in Table below: Table Costs of 11 kv Overhead Lines (Rs. in lakhs/km) Costs as obtained / Sl. Details validated No kv line with 80mm 2 ( Raccoon ) ACSR over meter PCC poles with 50 meter span kv lines with 50 mm 2 ( Rabbit ) ACSR over 9 meter PCC Poles with 60 meter span kv line with 30 mm 2 ( Weasel ) ACSR over 9 meter PCC poles with 70 meter span (c) LT lines (Overhead) The utility constructs LT lines 3 phase 5 wire, 3 Phase, 4 wire, and single phase 3 wire and single phase 2 wire lines with 50 mm 2, 30 mm 2 and 20 mm 2 ACSR on 8 meter supports with spans varying from 50 meter to 70 meter. The costs of LT lines (Overhead) as obtained / validated are given in Table below: Table Costs of LT lines (overhead) (Rs. in lakhs/km) Costs as obtained / Sl. Details validated No phase 5 wire line with 30 mm 2 ACSR (weasel) over meter PCC poles with 67 meter span 2 LT 3 phase 4 wire line with 30 mm 2 ACSR (weasel) over 8 meter PCC poles with 55 meter span phase 4 wire line with 3x50 mm 2 + 1x20 mm 2 ACSR over 8 meter PCC poles with 55 meter span 4 3 phase 4 wire line with 3x 30 mm 2 + 1x20 mm ACSR over 8 meter PCC poles with 67 meter span 90

101 (ii) 66/11 kv Substations (Receiving Stations) As discussed above the 66 kv voltage system is also considered under distribution. The utility generally constructs the substations with 1x8 MVA and 1x12.5 MVA power transformers initially. Substations with 1x20 MVA transformers are also in operation. The costs with break-up as below are obtained from PSEB / validated, (i) Civil works (ii) Equipment costs including structure etc., and (iii) labour, transport, establishment etc. The costs as obtained from the utility / validated are given in Table below: Table Costs of 66/11 kv Substations (Outdoor) (Rs. In lakhs) Costs as obtained / Sl. Details validated No /11 kv substation with 1x20MVA Transformer with 8 Nos. 11 kv outgoing feeders i) Control room, compound wall and other civil works including bore well etc. ii) Equipment costs including structures, foundations, cabling etc. iii) Labour, establishment, transport and other charges Total iv) 66 kv line bay Total cost /11 kv substation with 1x12.5 MVA Transformer and 6 Nos. outgoing feeders i) Civil works including control room, compound wall, bore well etc ii) Equipment costs including structures, foundations, cabling etc. iii) Labour, Transport & other charges Total kv line bay Total cost /11 kv substation with 1X 8 MVA power transformer with 5 Nos. 11 kv outgoing feeders. i) Civil works including control room, compound wall, bore well etc ii) Equipment costs including structures, foundations, cabling etc. iii) Labour, establishment, transport etc Total kv line bay Total cost The costs of 66/11 kv substations do not include the cost of land, capacitor bank, residential quarters etc. 91

102 (iii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25 kva, 63 kva and 100 kva. DTR stations with transformer capacity of 200 kva and 250 kva are also existing. The distribution transformers of 6.3 kva, 10 kva and 25 kva are proposed under OYT scheme for giving connections to agricultural pump sets from The costs of distribution transformer stations including of cost of structure etc., are given in Table below as obtained from the utility / validated. Sl. No. Table Costs of Distribution Transformer Stations (Outdoor) (Rs. in lakhs/each) Costs as obtained / Details validated Distribution Transformer stations (3 Phase) with, kva kva kva kva kva kva (iv) Metering Equipment, Meters etc. The utility is extending H.T supply at 11 kv upto 2500 kva demand and at 66 kv above 2500 kva demand. The costs of metering equipment, meters etc., as being used by the utility are given in table below. The cost includes installation costs. Table Costs of Metering Equipment and Meters (in Rs) Sl. Costs as obtained Details No kv CTs & PTs kv CT PT sets Trivector meter LT 3 Phase meter LT Single phase meter For 66 kv and 11 kv the cost of CTs, PTs and trivector meter has to be taken together to arrive at total cost of metering. 92

103 (v) Service Lines The costs of service connection estimates obtained from the utility for different classes of consumers are given in Table below: Table Service Line Costs Costs of Service (Rs.) S.No Details Single phase domestic & non domestic Three phase domestic & non domestic Three phase industrial Agricultural (un metered)

104 15. BSES Rajadhani Power Limited (BRPL), New Delhi BSES Rajadhani Power Limited distributes power in 19 districts across South and West area of Delhi. The distribution voltages are 66kV, 33kV, 11kV and LT (400V). Most of system is with underground cables. The utility prepares cost estimates for various works such as substations, distribution transformer stations, underground cable feeders, replacement of aged equipment, augmentation works, etc based on input costs arrived at twice a year in the months of January and June based on moving average prices calculated. The construction works are generally awarded on partial turnkey basis i.e. the utility purchasing and supplying all major materials and erection by the contractor along with supply of minor materials. The cost estimates prepared by the utility and costs as executed have been verified and found that the completion costs are generally within the cost estimates. The costs as obtained from the utility for each of the elements of distribution business are discussed below: (i) 66kV, 33kV, 11kV and LT lines: The utility manages 66kV, 33kV, 11kV and LT network. Most of the network is underground cable system. There are also some 11kV and LT overhead lines. (a) 66kV line (Underground cable) The utility generally uses single core 630 mm 2, XLPE 66kV cable for 66kV system. The cost per Km of underground cable system as obtained from the utility is given in Table below: Table Cost of 66kV UG Cable Lines (Rs. in lakhs / Km) Sl.No. Item Costs obtained i) 66kV UG cable line with XLPE power cable, CX630 mm 2 ii) Road cutting and restoration charges Total Data for the year is not available. 94

105 (b) 33kV Line (Underground) The utility generally uses three core 400 mm 2 XLPE, 33kV cable for 33kV system. The cost per Km of underground cable system as obtained from the utility is given in Table below: Table Cost of 33kV Underground Cable Line (Rs. in lakhs / Km) S.N Item Costs obtained i) 33kV UG cable line with XLPE power cable, CX400 mm 2 ii) Road restoration charges Total (b) 11kV line (Overhead) The utility generally erects 11kV overhead line with DOG (100 mm 2 ) ACSR on 11 meter PCC supports. The cost per Km of line as obtained from the utility is given in Table below: Table Cost of 11kV Lines (Overhead) (Rs. in lakhs / Km) S.N Item Costs obtained kV overhead line with DOG (100 mm 2 ACSR on PCC, 11 meter supports (c) 11kV UG cable The utility generally uses three core 300mm 2 system. XLPE, 11kV cable for 11kV UG cable The cost per Km of 11kV underground cable line as obtained from the utility is given in Table below: Table Cost of 11kV UG Cable Line (Rs. in lakhs / Km) S.N Item Costs obtained i) 11kV UG cable line with 3C X 300 mm 2 XLPE cable ii) Road restoration charges Total

106 (d) LT Lines (Overhead) The utility generally erects LT overhead line with DOG (100 mm 2 ) ACSR on 9 meter PCC supports. The cost per Km of line as obtained from the utility is given in Table below: Table Cost of LT Overhead Line (Rs. in lakhs / Km) S.N Item Costs obtained phase 4 wire LT overhead line with DOG ACSR on 9 meter supports (e) LT Underground Cable The utility generally uses 3½ core 300 mm 2 XLPE cable for LT system. The costs as furnished by the utility are given in Table below: Table Cost of LT UG Cable Line (Rs. in lakhs / Km) S.N Item Costs obtained i) 3phase LT UG cable line with 3½C X 300 mm 2 XLPE NA cable. ii) Road Restoration charges 3.47 Total (ii) 66/11kV Substations The utility generally constructs 66/11kV substations with 20/25 MVA power transformers. As and when the substations with 1X20 MVA transformer are fully loaded additional 20 MVA is being installed. 33/11 kv substations with 1x16 MVA, 2x16 MVA and 2x20 MVA are also in service. Delhi Vidyut Board has transferred land on lease to respective distribution licencees at the time of restructuring at the rate of Rs.1/sq. meter. Construction of substations is being taken up in the land so transferred. In certain cases, the distribution licencee procures land on lease basis on zonal variant rate for taking up any new substation. 33/11 kv outdoor substations are not being executed by the utility over the last 5 years. 96

107 Cost of the 66/11kV and 33/11kV substations as obtained from the utility / validated are given in Table below: Table Costs of 66/11kV and 33/11kV Substations (Rs. in lakhs) Costs obtained / S.N Item validated Erection of 66/11kV substation outdoor type with X25 MVA 66/11kV transformers and 25 Nos. 11kV feeders with capacitor bank and control room 2 Erection of 33/11kV substation indoor type with 2Nos. 20 MVA 33/11kV transformers and 11kV switchgear panels with 5.4 MVAR 11kV capacitor bank including control room Break-up of costs for land and civil works, equipment and overheads etc., are not available to analyse the costs. (iii) Distribution transformer stations At present, the utility generally installs distribution transformer stations with transformer capacities of 400 KVA, 660KVA and 990 KVA. DTR stations with 100, 500, 630 and 750 KVA capacity are also in operation. The costs of distribution transformer stations including cost of structures etc as obtained from the utility are given in Table below: Table Costs of Distribution Transformer Stations (Rs. in lakhs / Km) S.N Item Costs obtained KVA distribution transformer station Augmentation of Transformers 630 to 990 KVA The utility is generally augmenting the distribution transformer capacity with higher rating transformers and utilizing the released transformers for augmentation at other locations or for erection at new transformer stations and hence the costs do not reflect the real costs of a new station. 97

108 (iv) Service Lines The service line cum development charges being adopted by BRPL from 2007 are given in Table below: Table Service Line Costs S.N Sanctioned load (kw) Amount (Rs.) 1 Upto More than 5 upto More than 10 upto More than 20 upto More than 50 upto More than 100kW (at 11kV) 50% of the cost of HT cables line / OH line and switchgear The HT supply is extended to consumers for a load of 45kw and more. The service line and development charges are collected at fixed rates upto 100kW. For 100kW and more, the charges are shared by the utility and the consumer. 98

109 16. North Delhi Power Limited (NDPL), New Delhi NDPL distributes electricity in North & North west parts of Delhi. The distribution voltages are 66kV, 33kV, 11kV and LT (400V). Majority of the lines are underground. The utility prepares cost estimates for various works such as substations, distribution transformer stations, underground cable lines, replacement of aged equipment, augmentation works, etc based on input costs arrived at twice a year in April and October based on moving average cost and % inflation rate. The construction works are generally awarded on partial turnkey basis i.e. the utility purchasing and supplying all major materials and erection by the contractor along with supply of minor materials. The costs as obtained from the utility for each element of distribution business are discussed below: (i) 66kV, 33kV, 11kV and LT lines The utility manages 66kV, 33kV, 11kV and LT network. All the substations are outdoor type with voltage ratings of 66/11kV & 33/11kV and no indoor substations are existing. With most of the network is underground cable system, some 11kV and LT overhead lines are also existing. (a) 66kV line (Underground) The utility generally uses 66 kv single core 1000 mm 2, XLPE cable for 66 kv system. The utility has not taken up any 66kV line since However the cost per Km of under ground cable system as obtained from the utility is given in Table below: Table Cost of 66kV UG cable line 1 S.N Item (Rs. in lakhs / Km) Costs obtained i) 66kV UG cable line with XLPE power cable, 1CX1000 mm 2 ii) Road Restoration charges Total Data for the year is not available. (b) 33kV Line (underground) The utility generally uses 33 kv three core 400 mm 2, XLPE, cable for 33kV system. The cost per Km of laying 33 kv UG cable line as obtained from the utility is given in Table below: 99

110 1 S.N Table Cost of 33kV UG Cable Line Item (Rs. in lakhs / Km) Costs obtained i) 33kV UG cable line with XLPE power cable, 3CX400 mm ii) Road Restoration charges Total (c) 11kV line (Overhead) The utility generally erects 11kV overhead line with DOG ACSR on 11 meter, PCC supports. The cost per Km of line as obtained from the utility is given in Table below: Table Cost of 11kV Lines (Overhead) (Rs. in lakhs / Km) S.N Item Costs obtained Erection of 11kV overhead line with DOG ACSR on PCC, 11 meter supports (d) 11kV UG cable The utility uses 11 kv three core 300 mm 2 XLPE cable for 11kV UG cable line. The cost per Km of laying 11 kv UG cable as obtained from the utility is given in Table below: Table Cost of 11kV UG Cable Line (Rs. in lakhs / Km) S.N Item Costs obtained i) 11 kv UG cable line with 3C X 300 mm 2, XLPE cable ii) Road Restoration charges Total (e) LT lines (overhead) The utility generally erects LT overhead line with DOG (100 mm 2 ) ACSR on 9 meter PCC supports. The cost per Km of line as obtained from the utility is given in Table below: 100

111 Table Cost of LT Overhead Line (Rs. in lakhs / Km) S.N Item Costs obtained phase 4wire LT overhead line with DOG (100 mm 2 ) ACSR on 9 meter supports (f) LT UG Cable The utility generally uses 3½ core 300 mm 2, XLPE cable for LT system. The costs could not be obtained from the utility for LT UG cable system. (ii) 66/11kV substations The utility generally constructs 66/11kV substations with 20/25 MVA transformers. Cost of 66/11kV substation as obtained from the utility is given below in Table Table Cost of 66/11kV Substations (Rs. in lakhs / each) S.N Item Costs obtained Erection of 66/11kV substation with 2 Nos. 20/25 MVA 66/11kV transformers and 11kV switchgear panels for 10 Nos. 11kV feeders and 12kV 7.2MVAR capacitor bank NA Delhi Vidyut Board has transferred land on lease to respective distribution licencees at the time of restructuring at the rate of Rs.1/sq.m.Construction of substations is being taken up in the land so transferred. In certain cases, the distribution licencee procures the land on lease basis on zonal variant rate for taking up any new substation. The break-up of costs (i) land and civil works (ii) equipment and material and (iii) transport, erection, overheads etc., are not available to analyse the costs. (iii) Distribution transformer stations The utility generally installs distribution transformer stations with transformer capacities of 63 kva, 160 kva, 315 kva, 400 KVA, 630 KVA and 990 kva. The costs of distribution transformer stations including cost of structures etc as obtained from the utility are given in Table below. Most of the DTRs are pole mounted. 101

112 Table Costs of distribution transformer stations (Rs. in lakhs / each) S.N Item Costs obtained KVA distribution transformer station KVA distribution transformer station (iv) Metering Equipment and Meters Metering equipment includes 11 kv CT, PT set, trivector meters, LT three phase and single phase meters. The costs are given in Table below. Table Costs of metering sets and meters (in Rs) S.N Item Costs obtained kV CT PT set (60/5) LT 3 phase meter LT single phase meter (v) Service Lines The service line cum development charges being adopted by NDPL from 2007 are given in Table below: Table Service line costs S.N Sanctioned load (kw) Amount (Rs.) 1 Upto More than 5 upto More than 10 upto More than 20 upto More than 50 upto More than 100kW (at 11kV) 50% of the cost of HT cable line / OH line and switchgear 102

113 17. Chhattisgarh State Power Distribution Company Limited Chhattisgarh is not one of the States identified for the study. Chhattisgarh State Electricity Regulatory Commission has obtained the data from CSPDCL and furnished. The data / information obtained is considered for the study. Chhattisgarh State Electricity Board which was an integrated utility managing generation, transmission and distribution of electricity in the State has been restructured on functional basis w.e.f. 31/12/2008 and the distribution business in the state is being managed by the Chhattisgarh state power distribution company limited. The utility manages 33kV, 11kV and LT network. The utility prepares cost data / cost estimates every year based on the procurement cost of materials for various works such as 33/11kV substations, distribution transformer stations, overhead lines etc. The utility procures all the materials and gets the works executed through labour contracts. The costs are obtained from the utility for each element of distribution business from to The costs furnished are discussed below: (i) 33kV, 11kV and LT lines (a) 33kV Lines The utility has standardized the construction of 33kV overhead lines with Raccoon (80mm²) ACSR / AAAC on 9.1 meter PCC poles / 9.0 meter Rail poles with 100 and 125 meter spans and also constructs few lines with Dog (100mm 2 ) ACSR. The costs per Km of line obtained are given in Table below: 103

114 Table Costs of 33kV Lines (Rs. in lakhs / Km) S.N Item Costs obtained With 80mm² ACSR on 9.1 meter PCC poles (span 125 meter) With 80mm² ACSR on 9 meter Rail poles (span 125 meter) With 80mm² ACSR on 9 meter H beams (152X152mm) (span 125 meter) 4 With 100mm² ACSR on 9.1 meter PCC poles (span meter) 5 With 100mm² ACSR on 9 meter Rail poles (span 100 meter) (b) 11kV Lines The utility has standardized the construction of 11kV overhead lines with Rabbit (50/55mm²) ACSR / AAC and Weasel (30/34mm²) ACSR/AAC on 8.0 meter PCC poles with 100/125 meter spans. Few lines are constructed over Rail poles, H beams & R S joists. The costs per Km of line obtained are given in Table below: Table Costs of 11kV Lines (Rs. in lakhs / Km) S.N Item Costs obtained With 50mm² ACSR on 8.0 meter PCC poles (span 100 meter) With 30mm² ACSR on 8.0 meter PCC poles (span 125 meter) With 50mm² ACSR on 9.0 meter Rail poles (span 100 meter) With 50mm² ACSR on 9.0 meter H Beams (152X152mm) (span 100 meter) 5 With 50mm² ACSR on 9.0 meter R S Joists (135X85mm) (span 100 meter) 5 With 30mm² ACSR on 9.0 meter R S Joists (135X85mm) (span 100 meter) (c) LT Lines The utility has standardized the construction of LT lines - 3 phase 5 wire, 3 phase 4 wire and 1 phase 3 wire with 30mm² or 50mm² ACSR for phases and 20mm² ACSR for neutral on 8.0 meter PCC poles with 60 meter span. In urban areas 9.3 meter RS Joists are also used as supports. The costs per KM of line as obtained are given in Table below: 104

115 S.N Table Costs of LT Lines Item (Rs. in lakhs / Km) Costs obtained Phase 5 wire line on 8.0 meter PCC poles (span 60 meter) with ACSR of following sizes (a) 4X50mm² + 1X20mm² (b) 3X50mm² + 2X20mm² (c) 4X30mm² + 1X20mm² (d) 3X30mm² + 2X20mm² (e) 5X20mm² Phase 4 wire line on 8.0 meter PCC poles (span 60 meter) with ACSR of following sizes (a) 3X50mm² + 1X20mm² (b) 3X30mm² + 1X20mm² (c) 4X20mm² Phase 3 wire line on 8.0 meter PCC poles (span 60 meter) with ACSR of following sizes (a) 1X50mm² + 1X30mm² + 1X20mm² (b) 2X30mm² + 1X20mm² (c) 3X20mm² (a) 3 Phase 5 wire line on 9.3 meter RS Joists (125X70mm) (span 45 meter) in urban areas with 3X50mm² + 2X30mm² ACSR (b) 3 Phase 5 wire line on 9.3 meter RS Joists (175X85mm) (span 65 meter) in urban areas with 3X80mm² + 2X30mm² Phase 3 wire line on 9.3 meter RS Joists (125X70mm) (span 45 meter) in urban areas with ACSR of following sizes (a) 1X50mm² + 1X30mm² + 1X20mm² (b) 2X30mm² + 1X20mm² (c) 3X20mm² (ii) 33/11kV substations The utility has standardized the construction of 33/11kV substations with single transformer with provision to install 2 nd power transformer with the following transformer capacities and 11kV outgoing feeders. (a) with 1X1.6 MVA power transformer and 2 Nos. 11kV outgoing feeders and 600 KVAR capacitor bank. (b) with 1X3.15 MVA power transformer and 2 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank. (c) with 1X5.0 MVA power transformer and 3 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank. The substation casts obtained from the utility are given in Table below: 105

116 S.N Table Costs of 33/11kV Substations Item 1 33/11kV SS with 1X1.6 MVA power transformer and 2 Nos. 11kV outgoing feeders and 600 KVAR capacitor bank. 2 33/11kV SS with 1X3.15 MVA power transformer and 2 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank. 3 33/11kV SS with 1X5.0 MVA power transformer and 3 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank (Rs. in lakhs) Costs obtained The break-up of above costs of 33/11kv SS i.e land and civil works, equipment and materials, labour charges and overheads are given in Table below: Table Costs break-up of 33/11kV Substations (Rs. in lakhs) S.N Item Cost during X1.6 MVA 1X3.15 MVA 1X5.0 MVA 1 Civil works including control room 2 Equipment and materials Labour charges for erection and commissioning, contingencies, establishment charges, etc. Total The above costs do not include the cost of land (iii) Distribution transformer stations The utility installs three phase distribution transformers of capacities 25 kva, 63 kva, 100 kva, 200 kva, 315kVA and 500 kva. The utility procures mainly conventional type transformers. During , the utility purchased amorphous core transformers of capacities 100 kva and 200 kva also. The utility has standardized cost estimates for erection of 25 KVA, 63 KVA, 100 KVA and 200 KVA distribution transformers. The cost of distribution transformer stations with different capacity transformers including structure etc are given in Table below. Table Costs of Distribution Transformer Stations (Rs. in lakhs) S.N Item Costs obtained KVA distribution transformer stations KVA distribution transformer stations KVA distribution transformer stations KVA distribution transformer stations

117 (iv) Metering equipment The costs of metering sets and meters as installed for different categories of consumers as obtained from the utility are given in Table below: Table Costs of Meters and Metering Equipment (in Rs) S.N Item Costs obtained (a) Single phase energy meters, high precision, 5 to Amps (b) Single phase static meters 5-30Amps Poly phase static energy meters (a) Amps (b) Amps with data storage (c) CT operated, 100/5 Amps with data storage (d) High precision meter, 10-40Amps HT static trivector meter Box for HT meter

118 18. Maharashtra State Though Maharashtra is not one of the identified States for the study, the Maharashtra Electricity Regulatory Commission collected some information regarding costs of substations, lines and distribution transformer stations from Maharashtra State Electricity Distribution Company Limited, Tata Power Company Ltd and BEST ltd. and forwarded to the consultant. The data / information furnished is not complete and it is based on cost estimates for However the data furnished is discussed below: A. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD The utility furnished item wise cost data / cost estimate for for the following works. (i) 33kV, 11kV and LT overhead lines (a) 33kV lines The utility generally uses 100mm² ACSR on 9.0M PSC poles for construction of 33kv lines. The estimated cost per Km of line furnished by the utility separately for rural, urban and hilly areas are given in Table below. Table Costs of 33kV Lines (Rs. in lakhs / Km) S.N Item Cost during Rural Urban Hilly 1 33kV line with 100mm 2 ACSR on 9.0 meter PSC poles (b) 11kV lines The utility generally uses 55mm 2 AAAC on 9.0 meter PSC poles and 100mm 2 ACSR on 11.0 meter RS Joists for construction of 11kV lines. The estimated costs per Km of line furnished by the utility are given in Table below. Table Costs of 11kV Lines (Rs. in lakhs / Km) S.N Item Cost during Rural Urban Hilly 1 11kV line (pin type) with 55mm 2 AAAC on 9.0 meter PSC poles 2 11kV lines (suspension type) with 100mm 2 ACSR on 11.0 meter RS Joists of size 100X116mm

119 (c) LT lines The utility generally erects LT lines 3phase 4 wire on 8.0 meter PSC poles and 3phase 5 wire 9.0 meter R S Joists using 50mm 2 AAAC for phases and 25mm 2 AAAC for neutral with 50 meter span. The estimated costs per Km of line furnished by the utility are given in Table below: Table Costs of LT Lines (Rs. in lakhs / Km) S.N Item Cost during Rural Urban Hilly 1 3 Phase 4 wire line with 50mm 2 AAAC for phases and 25mm 2 AAAC for neutral on 8 meter PSC poles (span 50 meter) 2 3 Phase 5wire line with 50mm 2 AAAC for phases and 25mm 2 AAAC for neutral on 9 meter R S Joists (span 50 meter) (ii) 33 and 11kV underground cable systems (a) 33kV UG cable lines The utility generally uses 33kV, 3C/300mm 2 XLPE cable for 33kV underground system. The estimated cost per Km of laying 33kV UG cable furnished by the utility is given in Table below. Table Cost of laying 33kV UG cable lines (Rs. in lakh / Km) S.N Item Cost during Rural Urban Hilly 1 33kV, 3 core, 300mm 2 XLPE underground cable system (b) 11kV UG cable The utility generally uses 11kV. 3 core /300mm 2 XLPE cable for 11kV underground system. The estimated cost per Km of laying 11kV UG cable furnished by the utility is given in Table below: 109

120 Table Cost of laying 11kV UG cable line (Rs. in lakh / Km) S.N Item Cost during Rural Urban Hilly 1 11kV, 3 core, 300mm 2 XLPE underground cable system (iii) 33/11kV substations The utility generally erects 33/11kV substations with the following power transformer capacities and 11kV outgoing feeders. (a) 33/11kV substation with 1X5.0 MVA transformer and 3Nos. 11kV outgoing feeders (outdoor type). (b) 33/11kV substation with 1X10.0 MVA transformer and 4Nos. 11kV outgoing feeders (33kV side is outdoor and 11kV side is indoor type). The estimated costs for construction of 33/11kV substations furnished by the utility are given in Table below: Table Costs of 33/11kV Substations (Rs. in lakhs / each SS) S.N Item Cost during Rural Urban Hilly 1 33/11kV substation with 1X5.0 MVA transformer and with 11kV switchgear (outdoor type) comprising 1 incoming and 3 outgoing 2 33/11kV substation with 1X10.0 MVA transformer and with 11kV switchgear (indoor type) comprising 1 incoming, 1 bus coupler and 4 outgoing (iv) Distribution transformer stations The utility installs of 3Phase distribution transformers of capacities 63KVA, 100 KVA, 200 KVA, 315 KVA and 630 KVA of both 22kV / 0.4kV and 11kV / 0.4kV voltages and 1phase 11kV / 0.25kV distribution transformers of capacities 15 KVA and 25 KVA at distribution transformer stations. The utility has furnished the cost of erection of distribution transformer stations with 200 KVA, 11kV / 0.4kV transformer which is given below in Table

121 Table Cost of distribution transformer stations (Rs. in lakhs / each) S.N Item Cost during Rural Urban Hilly 1 Erection of 11kV / 0.4kV, 200KVA distribution transformer centre on 9 meter RS Joists of size 100X116mm with MCCB distribution box (v) Metering equipment The costs of meters as installed for different categories of consumers as obtained from the utility are given in Table below: Table Costs of Meters and Metering Equipment S.N Item Costs obtained LT single phase meters 5-30 AMPS HT three phase meters HT trivector meter 4002 (in Rs) B. TATA POWER COMPANY LIMITED The utility has furnished the costs of the following works as executed for one year i.e (i) 33/11kV Substation S.N Item Table Cost of 33/11kV Substation 1 33/11kV substation with 2 Nos. 20 MVA power transformers and 17 Nos. 11kV feeders (Outdoor type) (Rs. in lakhs) Costs obtained Cost of many items such as 11kV PTs, 33kv and 11kV lightning arrestors, 33kV and 11kV isolating switches are not included. Further the cost of 20 MVA power transformers is taken as Rs. 20 lakhs which is the procurement cost during hence, the cost cannot be considered as executed cost of 33/11kV substation with 2 Nos. 20 MVA transformers. 111

122 (ii) 33kV Underground Cable System Table Cost of 33kV UG cable System S.N Name of work 1 Laying of 33kV, 3core, 400mm 2 UG cable, testing and commissioning including road restoration charges payable to the Authorities (Rs. in lakhs / Km) Cost obtained (iii) 11kV underground cable system Table Cost of 11kV UG Cable System S.N Name of work 1 Laying of 11kV, 3core, 300mm 2 UG cable, testing and commissioning including road restoration charges payable to the Authorities (iv) Distribution transformer stations Table Cost of Distribution Transformer Station S.N Name of work 1 11/0.4 kv 1250 KVA distribution transformer on double pole structure (Rs. in lakhs / Km) Cost obtained (Rs. in lakhs) Cost obtained (v) Meters and metering equipment Table Costs of Metering Equipment and Meters (Rs. in lakhs) S.N Item Costs obtained 1 22kV CT, PT unit kV CT, PT unit HT trivector meter LT trivector meter LT three phase meter LT single phase meter - C. BEST Limited The utility erects indoor type 33/11kV substations, 33kV & 11kV lines with underground cables and erects both indoor and outdoor type distribution transformer stations. The costs as executed are furnished for the year for the following works: 112

123 (i) 33/11kV Substations Table Cost of 33/11kV Substation (Rs. in lakhs) S.N Item Cost obtained 1 33/11kV substation (indoor type) with 2 Nos. 16 MVA power transformers and 12 Nos. 11kV feeders including 2X5 MVAR capacitor bank (ii) 33kV Underground Cable System Table Costs of 33kV UG cable system (Rs. in lakhs / Km) S.N Name of work Cost obtained 1 Laying of 33kV, 3core, 185mm 2 XLPE copper cable, including road restoration charges payable to the Authorities (iii) 11kV Underground Cable System Table Costs of 11kV UG cable system (Rs. in lakhs / Km) S.N Name of work Cost obtained 1 Laying of 11kV, 240mm 2 XLPE cable, including road cutting and restoration charges payable to the Authorities (iv) Distribution Transformer Stations Table Costs of Distribution Transformer Stations (Rs. in lakhs) S.N Name of work Costs obtained 1 11/0.4kV, 2 Nos. 630 KVA distribution transformers station (outdoor type) 2 11/0.4kV, 2 Nos. 630 KVA distribution transformers station (indoor type)

124 5. Cost Analysis and Cost Benchmarks 5.1 The data collected from various utilities for benchmarking costs of various elements in the Distribution Business is discussed in Chapter-4. The costs collected are analysed and Benchmark costs arrived at in this chapter. 5.2 Cost Analysis As discussed in Chapter-4, different utilities have adopted different practices in the construction of 33 kv, 11 kv and LT overhead lines, 33/11 kv substations and distribution transformer stations. The costs differ based on the practices followed. For instance, 33 kv, 11 kv and LT lines are constructed with different sizes of conductors, types of supports, span lengths etc., which have impact on costs. Similarly the case with 33 kv/11 kv substations (layouts of substation, transformer capacities) and distribution transformer stations. As explained in Chapter-4, the costs obtained from different utilities (validated where required) are compared and a range of cost benchmarks arrived at. These benchmark costs for elements in Distribution Business are discussed below: The costs include cost of material, transport, erection, supervision and other charges. Since these are all small gestation projects, being completed within 12 to 18 months, the interest during construction is not added to the project cost. The interest during construction is taken overall on all works by the utility. Taxes, duties etc., are included in the cost of equipment and material and hence they are not considered separately. 5.3 Benchmarking Costs kV, 11kV and LT Lines As discussed in chapter-4 the costs for the year and are considered for benchmarking costs of various elements in distribution business. As mentioned above different utilities adopt different norms in construction of 33 kv,11 kv and LT lines. Some utilities use All Aluminium Alloy Conductor (AAAC), of 114

125 different sizes; some use Aluminium Conductor Steel Reinforced (ACSR). The lines are erected over different types of supports - PSCC, RCC, RS Joists, rail poles, steel tubular poles etc., and adopt different spans in urban and rural areas. There are no separate design / norms for urban and rural areas. Normally longer span is adopted in rural area and shorter span for urban area with same supports and conductor. As such no separate costs could be benchmarked for urban and rural areas and most of the States do not have separate cost data for urban and rural areas. Some utilities use RS Joists and rail poles in urban areas for 33 kv and 11 kv lines. The costs of lines 33 kv, 11 kv and LT differ from utility to utility with the size of conductors, type of supports used and spans adopted. The lines being constructed are categorised into a number of groups based on conductor size, type of supports and range of spans and a range of costs arrived at for benchmarking. The costs for for some utilities in the states like West Bengal and Assam are based on the turnkey contracts executed / under execution and they are state specific. The 33 kv, 11 kv and LT lines as being constructed by various utilities discussed in Chapter-4 are summarised in Tables-5.1, 5.3 and 5.5 and comparative costs of various utilities are given in Tables 5.2, 5.4 and 5.6. The benchmark costs are arrived at for each voltage line. (a) 33 kv Overhead Lines The distribution utilities in Gujarat UGVCL and MGVCL and Punjab State Electricity Board do not have 33 kv system. The utilities draw power at 11 kv from 66/11 kv substations. The utilities construct the lines either with 100 mm 2 / 80 mm 2 All Aluminium Alloy Conductor (AAAC) or Aluminium Conductor with Steel Reinforced (ACSR), mostly over PSCC and RCC supports and in few cases over RS Joists and rail poles mostly in urban areas with a normal span of 80 to 100 meters. The Uttarkhand Power Corporation constructs the lines with the steel tubular poles with shorter span of 50 meters being hilly area. They also run continuous 7/16 SWG steel wire as ground wire on the line. The costs differ from utility to utility based on the conductor size, supports used, span lengths adopted and construction costs. The costs of lines are categorised based on conductor size and type of supports used with a range of spans to arrive at a range of costs and benchmark costs across the utilities. The cost of line in UPCL is substantially high due to use of steel tubular poles with shorter 115

126 spans and also running continuous steel wire (ground wire) on the lines and transport and construction practices. Hence the costs of the lines in UPCL are not taken to benchmark the cost and this is given separately as state specific cost. The types of 33 kv lines constructed by the utilities and the comparative costs are given in Tables 5.1 and 5.2 below. The benchmark costs are arrived at from the comparative costs in Table 5.2. Table kv Line with Different sizes of Conductors, Type of Supports and Span lengths Sl. No. Utility Conductor Supports Span lengths (Meters) 1 APSPDCL, Andhra Pradesh 1 100mm² AAAC 9.1 meter PSCC 105 Ground wire 2 100mm² AAAC 9.1 meter PSCC 80 2 APCPDCL, 1 100mm² AAAC 9.1 meter PSCC 105 Andhra Pradesh 2 100mm² AAAC 9.1 meter PSCC mm² AAAC 9.1 meter PSCC 65 3 TNEB, Tamil Nadu 1 100mm² ACSR 9.1 meter RCC 90 4 UGVCL, Gujarat 1 33kV lines not constructed 5 MGVCL, Gujarat 1 33kV lines not constructed 6 MPPKVVCL, Madhya Pradesh mm² ACSR 100 mm 2 ACSR 9.1 meter PSCC 9.1 meter PSCC MPMKVVCL, 1 80mm² ACSR 9.1 meter PSCC 100 Madhya Pradesh 2 100mm² ACSR 9.1 meter PSCC UPCL, Uttarkhand 1 100mm² ACSR 9 meter ST poles 50 7/16 SWG Steel wire 2 100mm² ACSR 11 meter S.T Poles 58 7/16 SWG Steel wire 9 WBSEDCL, West Bengal 1 100mm² ACSR 9 meter PCC mm² ACSR 12.8 Rail mm² AAAC 9 meter PCC CAEDCL, Assam 1 80mm² AAAC 9.75 meter PSC mm² AAAC 80 mm 2 AAAC 9.75 meter PSC (Double pole) 10 meter ST poles UAEDCL, Assam 1 80mm² AAAC 9.75 meter PSC mm² AAAC mm 2 AAAC 9.75 meter PSC (Double pole) 10 meter ST poles 12 CESU Orissa 1 100mm² AAAC 9 meter PSC mm² AAAC 9 meter PSC SOUTHCO, Orissa 1 100mm² AAAC 9 meter PSC mm² AAAC 9 meter PSC PSEB, Punjab 1 33 kv lines not constructed 15 NDPL, Delhi 1 33 kv OH lines not constructed 16 BRPL, Delhi 1 33 kv OH lines not constructed 17. CSPDCL, Chhattisgarh 1 100mm² AAAC 9.1 meter PCC mm² ACSR 9 meter Rail poles mm² ACSR 9.1 meter PCC mm² ACSR 9.1 meter Rail poles mm² ACSR 9 meter H Beams 125 A standard cost estimate for 1KM of 33kV line with 100SQ MM AAA conductor over 9.1 meters PSCC poles at 65 meters span, 75 kg. per square meter wind pressure is given in Annexure

127 Sl.No. Table-5.2 Comparative costs of 33 kv over head line with different conductor sizes, supports and span lengths (Cost Rs. in lakhs / km) Cost of 33 kv lines Utility 80/100 mm 2 AAAC on PSCC poles 65 to 105 meter span 80/100mm 2 ACSR RCC/ PSCC poles 90 to 100 meter span 80 mm 2 ACSR on Rails meter span 100 mm 2 ACSR on ST poles 60 meter span with Ground wire 80 mm 2 AAAC on PSCC poles 100 meter span 150 mm 2 AAAC on PSCC poles DPs 50 meter span 80 mm 2 AAAC on ST pole DPs 100 meter span (1) (2) (3) (4) (5) (6) (7) (8) (9) APSPDCL, Andhra Pradesh 3.49 to to APCPDCL, Andhra Pradesh 2.99 to to TNEB, Tamil Nadu UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL, Madhya Pradesh 2.79 to to MPMKVVCL, Madhya Pradesh 3.05 to to UPCL, Uttarkhand 7.69 to to WBSEDCL, to West Bengal 4.38 * 10 CAEDCL, Assam to * 11 UAEDCL, Assam to * 12 CESU, Orissa 3.20 to to SOUTHCO, Orissa 2.70 to to PSEB, Punjab NDPL, Delhi BRPL, Delhi CSPDCL, Chhattisgarh to Cost Range 2.70 to to to to to Benchmark costs for 33 kv line with 80/100 mm 2 AAAC / ACSR over PSCC/RCC supports ( ) Rs to 3.60 lakhs/km. Benchmark costs for 33 kv line with 80/100 mm 2 AAAC / ACSR over Rail poles ( ) Rs.5.20 to 5.75 lakhs / km. The 33 kv lines in Assam and UPCL are on the higher side in view of use of higher size conductor, steel tubular poles, short spans adopted, difficult terrain etc. The costs are as under. Separate Benchmarking is recommended for them. Assam: 1. 80mm 2 AAAC on PSCC poles with 100M span & 80mm 2 AAAC on steel tubular DPs, 100meter span = Rs.9.00 to Rs lakh 2. 80mm 2 AAAC on PSCC poles with 100M span =. Rs.5.50 to Rs.6.40 lakh UPCL: 100mm 2 ACSR on steel tubular poles 60Meters span with ground wire = Rs.9.00 to Rs lakh. 117

128 It is seen from Table-5.2 the benchmark cost for 33 kv line with AAAC and ACSR over PSCC or RCC poles would be Rs.3.00to Rs.3.60 lakh / km and those constructed over RS Joists and rail poles would be Rs.5.20 to Rs.5.75 lakh except in the case of Uttarkhand Power Corporation and the utilities in Assam where the costs would be Rs.7.00 to lakhs / km. (b) 33 kv Underground System Five utilities (i) Central Power Distribution Company of Andhra Pradesh Limited (ii) Tamil Nadu Electricity Board (iii) Central Electricity Company of Orissa Limited and two Utilities in Delhi are using underground cable system. The cost of 33 kv underground system includes the cost of cable, road cutting, laying of cable and road restoration charges. The road restoration charges are substantial and the charges have to be paid as levied by the respective Municipal Corporations and the distribution licensee has no control. The cost of cable and the road restoration charges are given in Table 5.1(a) below: The costs include cost of all accessories, laying etc. Table-5.1 (a) Costs of 33 kv Underground System Sl. No. Name of the Utility 1 APCPECL (i) Cost of cable, UG cable with 1x300 UG cable with 3x400 UG cable with 1x630 mm 2 XLPE mm 2 mm 2 XLPE (3 XLPE circuits) accessories laying, etc. (ii) Road restoration charges T TNEB (i) Cost of cable, accessories laying etc. (ii) Road restoration charges Total CESU, Orissa (i) Cost of cable, accessories laying etc. (ii) Road restoration charges Total NDPL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges etc. Total BRPL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges Total

129 Since there is substantial difference in road restoration charges being levied by the Municipal Corporation from city to city on which utility has no control, it is considered appropriate to benchmark the cost of cable, cable laying including all accessories excluding road restoration charges. The benchmark costs for underground cable for for 3x400 mm 2 XLPE underground cable with all accessories and laying would be Rs.25 to 30 lakhs per Km. in Andhra Pradesh (Hyderabad city) and Rs.35 to 42 lakhs in Delhi. The benchmark costs for 1x630 mm 2 (3 circuits) x LPE under ground cable with all accessories and laying could be Rs.25 to 30 lakh per Km. in Tamil Nadu. The benchmark costs for 1x 300 mm 2 UG cable (3 circuits) with all accessories and laying could be Rs. 40 to 43 lakhs per Km. in CESCO, Orissa under the turn key contract. (c) 11 kv Overhead Lines: As in the case of 33 kv lines the utilities construct 11 kv lines with 50/55 mm 2 and 30/34 mm 2 AAAC and ACSR mostly over PSCC and RCC supports with a span of 50 to 70 meters and in some cases with 80 to 100 meter spans. UPCL however, uses steel tubular poles with 80 meter span and also run a continuous steel wire on the lines as ground wire. The costs differ utility to utility based on the size of the conductor and type of supports used and also the construction practices followed. As in the case of 33 kv lines, the 11 kv lines are categorised (grouped) based on the size of conductor and supports with a range of spans to arrive at a range of costs and benchmark costs across the utilities except UPCL. The costs of lines in UPCL are high in view of use of the steel tubular poles, running of continuous ground wire and the high transport and construction costs due to hilly terrain, hence the costs of UPCL are to be treated separately as state specific. The types of 11 kv lines constructed by the utilities and comparative costs are given in Tables 5.3 and 5.4 below. The benchmark costs are arrived at from the range of comparative costs in Table

130 Sl. No. Table kv Line with Different sizes of Conductors, Type of Supports and Span lengths Utility Conductor Supports Span lengths (M) 1 APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 1 55mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 9.1 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 9.1 meter PSCC mm² AAAC 11M RS Joists 50 3 TNEB, Tamil Nadu 1 7/4.09mm² ACSR 9.14 meter RCC /3.35mm 8 meter RCC /3.35mm ACSR 7.5 meter RCC /2.59 ACSR 8 meter RCC ACSR 8 meter RCC 75 4 UGVCL, Gujarat 1 55mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC mm² ACSR RSJS 33 5 MGVCL, Gujarat 1 55mm² AAAC 8 meter PSCC mm² AAAC 8 meter PSCC 50 Others 6 MPPKVVCL, 1 50mm² ACSR 8 meter PCC 100 Madhya Pradesh 7 MPMKVVCL, Madhya 1 50mm² ACSR 8 meter PCC 100 Pradesh 8 UPCL, Uttarkhand 1 50mm² ACSR ST Poles 50 7/16 SWG Steel wire 2 50mm² ACSR ST Poles 80 7/16 SWG Steel wire 9 WBSEDCL, West Bengal 1 50mm² / ACSR/AAAC 8 meter PCC mm² / ACSR/AAAC 8 meter PCC mm² ACSR ST Pole mm² ACSR ST Pole CAEDCL, Assam 1 Weasel (34mm²) 8.5 meter PSC 100 AAAC 2 Weasel (34mm²) 8.5 meter RSJS 100 AAAC 3 Weasel (34mm²) 8.5 meter ST Pole 100 AAAC 4 Raccoon (80mm² 9.75 meter PSC 50 AAAC) pole 11 UAEDCL, Assam 1 Weasel (34mm²) 8.5 meter PSC 100 AAAC 2 Weasel (34mm²) 8.5 meter RSJS 100 AAAC 3 Weasel (34mm²) 8.5 meter ST Pole 100 AAAC 4 Raccoon (80mm² ) 9.75 meter PSC 50 AAAC pole 12 CESU, Orissa 1 80mm² AAAC 8 meter PSC mm² AAAC 8 meter PSC 70 to mm² AAAC 8 meter PSC 70 to

131 13 SOUTHCO, Orissa 1 55mm² AAAC 9/8 meter PSC 70 to mm² AAAC 9/8 meter PSC 70 to PSEB, Punjab 1 80mm² ACSR 8/9 meter PCC mm² ACSR 8/9 meter PCC mm² ACSR 8/9 meter PCC NDPL, Delhi 1 DOG (100mm 2 ) 11 meter PCC ACSR 16 BRPL, Delhi 1 DOG (100mm 2 ) 11 meter PCC 17. CSPDCL, Chhattisgarh ACSR 1 50mm² ACSR 8 meter PCC mm² ACSR 9 meter Rail poles mm² ACSR 9 meter RS Joists mm² ACSR 9 meter H Beams mm² ACSR 8 meter PCC poles mm² ACSR 9 meter RS Joists 100 A standard cost estimate for 1 km of 11 kv line with 55 sq. mm. AAA conductor over 8 meters PSCC poles at 60 meters span, 75 kg/sq.mt. wind pressure is given in Annexure

132 Table-5.4 Comparative costs of 11 kv overhead line with different conductor sizes, supports at different span lengths (Cost Rs. in lakhs / km) Sl. No. Utility 50/55 mm 2 AAAC on PSCC poles 50 to 75 meter span 34 mm 2 AAAC on PSCC poles 50 to 65 meter span 80 mm 2 ACSR on RCC/ PSCC poles 105 meter span Cost of 11 kv lines 50 mm 2 ACSR on RCC/PSCC poles 50 to 80 meter span 50 mm 2 ACSR on PSCC poles 100 meter span 50 mm 2 ACSR on ST poles 50 to 80 meter span 55mm 2 AAAC on 11 meter RSJ poles 50 meter span 50mm 2 ACSR on 9 meter rail poles/rs Joists 100 meter span (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) APSPDCL, Andhra Pradesh 1.67 to to to to APCPDCL, Andhra Pradesh 2.16 to to to to TNEB, Tamil Nadu to 2.15 to UGVCL, Gujarat MGVCL, Gujarat MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 3.04 to 3.88 to WBSEDCL, to West Bengal CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi 16 BRPL, Delhi CSPDCL, Chhattisgarh to 3.69 Cost Range 1.67 to 1.98 to 1.49 to 1.56 to to 2.00 to 1.81 to 1.78 to 2.90 to 3.19 to to

133 Sl. No. Table-5.4 (Contd.) Comparative costs of 11 kv overhead line with different conductor sizes, supports at different span lengths (Rs. lakhs/km.) Cost of 11 kv lines Utility 34 mm 2 AAAC on PSC pole 100 meter span 34 mm 2 AAAC on RS Joist pole 100 meter span 34 mm 2 AAAC on ST pole 100 meter span 80 mm 2 AAAC on PSC pole 50 to 70 meter span 30 mm 2 ACSR on PSC/RCC pole 6o to 100 meter span 30 mm 2 ACSR on ST pole 75 meter span 100 mm 2 AAAC on RS Joist 33 meter span 100mm 2 ACSR on PSCC poles 50 meter span (11) (12) (13) (14) (15) (16) (17) (18) APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu UGVCL, Gujarat MGVCL, Gujarat 6 MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, to West Bengal CAEDCL, Assam * to 5.15 * 11 UAEDCL, Assam * to 5.15 * 12 CESU, Orissa SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi BRPL, Delhi CSPDCL, Chhattisgarh Cost Range 1.43 to to to to to to to 6.60 Benchmark Costs for 11 kv line with 50/55 mm 2 AAAC / ACSR over PSCC/RCC supports Rs to 2.50 lakhs/km. Benchmark Costs for 11 kv line with 30/34 mm 2 AAAC/ACSR over PSCC/RCC supports Rs.1.50 to 2.20 lakhs/km. The lines constructed over Rail poles, ST poles and with higher size conductor and short spans in Assam and UPCL and other utilities are not brought under Benchmark costs. The costs would be Rs.2.50 to Rs.4.10 lakh/km. The costs for the utilities in Delhi with 100 mm 2 ACSR over 9 meter PCC poles range from Rs.5.4 to 6.6 lakhs/km. Such lines and other specific lines with higher size conductor over special support etc. to be mentioned specifically by the utilities for approval of SERC/appropriate authority. For hilly areas separate benchmark costs are considered as follows: UPCL & ASSCM: Rs to 5.00 lakhs 123

134 It is seen from Table-5.4 the benchmark costs for 11 kv line with 55/34 mm 2 AAAC and ACSR over PSCC and RCC supports would be Rs.1.50 lakh to Rs lakh per km. In the case of UPCL and Assam where the cost would be Rs.2.80 lakh to Rs.4.10 lakh per km. In the case of NDPL and BRPL, Delhi, the 11 kv OH line with 100mm 2 ACSR over PSCC supports ranges from Rs.5.50 to 6.60 lakhs per km. (d) 11 kv Underground System Five utilities (i) Central Power Distribution Company of Andhra Pradesh Limited (ii) Tamil Nadu Electricity Board (iii) Madhya Gujarat Vij Company Limited and two Utilities in Delhi are using underground cable system. The cost of 11 kv underground system includes the cost of cable, road cutting, laying of cable and road restoration charges. The road restoration charges are substantial and the charges have to be paid as levied by the respective Municipal Corporations and the distribution licensee has no control. The cost of cable and the road restoration charges are given in Table 5.3 (a) below: The costs include cost of all accessories, laying etc. Table-5.3 (a) Costs of 11 kv Underground System Sl. No. Name of the Utility 1 APCPECL (i) Cost of cable, accessories laying, etc. UG cable with 1x300 UG cable with 3x120 UG cable with 3x185 mm 2 XLPE mm 2 mm 2 XLPE (3 XLPE circuits) (ii) Road restoration charges Total TNEB (i) Cost of cable, accessories laying etc. (ii) Road restoration charges Total MGVCL, Gujarat (i) Cost of cable, accessories laying etc. (ii) Road restoration charges - - Total NPDL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges etc. Total BRPL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges Total

135 Since there is substantial difference in road restoration charges being levied by the Municipal Corporation from city to city on which utility has no control, it is considered appropriate to benchmark the cost of cable, cable laying including all accessories excluding road restoration charges. The benchmark costs for underground cable for for 3x300 mm 2 XLPE underground cable with all accessories and laying would be Rs.14 to 16 lakhs per Km. in Andhra Pradesh (Hyderabad city) Rs.12 to 15 lakhs in Tamil Nadu and Rs.12 to 20 lakhs in Delhi. The benchmark costs for 3x185 mm 2 XLPE under ground cable with all accessories and laying could be Rs.10 to 14 lakh per Km. in Andhra Pradesh and MGVCL in Gujarat. The benchmark costs for 3x120 mm 2 UG cable with all accessories and laying could be Rs. 7 to 8 lakhs per Km. in Tamil nadu. (e) LT overhead System As explained in Chapter-4 the utilities construct different types of LT lines to serve different categories of consumers. LT 5 wire line is to service three phase consumers and street lights, 4 wire line to service three phase loads mostly 3 phase residential, commercial, industrial and agriculture loads, 3 wire line is to service single phase consumers along with street lights and 2 wire line to feed exclusively, single phase consumers. The utilities use 55 mm 2 and 34 mm 2 AAAC and ACSR, normally higher size conductor for three phases and lower size for neutral and street lights or for all phases and neutral based on load. As in the case of 33 kv and 11 kv lines the utilities use mostly PSCC and RCC supports but of 8M with spans ranging 50 to 70 meters except UPCL which uses steel tubular poles with 40 meter span. As in the case of 33 kv and 11 kv lines, the costs differ from utility to utility based on the conductor size, number of wires, type of supports used, span lengths and construction practices adopted. The cost of LT lines are broadly categorised as 5 wire, 4 wire and 3 wire based on conductor size and type of supports used with a range of span lengths to arrive at range of costs and benchmark costs. The cost of LT lines in UPCL is high due to use of steel tubular poles with shorter spans. 125

136 The costs in UPCL are treated separately as they do not fit into benchmark costs comparable across all the utilities. The types of LT lines constructed by each utility and the costs are given in Tables-5.5 and 5.6 respectively below. The benchmark costs are arrived at based on the range of costs across the utilities. Table-5.5 LT Line with Different sizes of Conductors, Type of Supports and Span lengths Sl. No. 1 APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPKVVCL, Madhya Pradesh Utility Conductor Supports Span lengths (Meters) 1 3X55mm² + 2X34mm² 8 meter PSCC poles 65 AAAC 2 3X55mm² + 2X34mm² 8 meter PSCC poles 60 AAAC 3 5X34mm² AAAC 8 meter PSCC poles X34mm² AAAC 8 meter PSCC poles X55mm² + 1X34mm² 8 meter PSCC poles 65 AAAC 6 3X55mm² + 1X34mm² 8 meter PSCC poles 60 AAAC 7 4X34mm² AAAC 8 meter PSCC poles X34mm² AAAC 8 meter PSCC poles X34mm² AAAC 8 meter PSCC poles X34mm² AAAC 8 meter PSCC poles x55 mm²+2x34 mm² 8 meter PSCC poles 65 AAAC 2 5x34 mm² AAAC 8 meter PSCC poles X55mm² + 1X34mm² 8 meter PSCC poles 65 AAAC 4 4X34mm² AAAC 8 meter PSCC poles X34mm² AAAC 8 meter PSCC poles X16mm² + 1X25mm² AB cable 8 meter PSCC poles X7/ X7/2.59 mm RCC poles 60 ACSR 2 4X7/2.59mm ACSR RCC poles X7/2.59mm ACSR RCC poles X7/2.59mm ACSR RCC poles X55mm² + 2x34 mm² RSJS 30 AAAC 2 3X55mm² + 2x34 mm² 8 meter PSCC poles 50 AAAC 3 5X34 mm² AAAC 8 meter PSCC poles 30/50 4 3X55mm² + 1x34 mm² RSJS poles 30 AAAC 5 3X55mm² + 1x34 mm² 8 meter PSCC poles 30 AAAC 6 3X55mm² + 1x34 mm² 8 meter PSCC poles 50 AAAC 7 4X34 mm² AAAC 8 meter PSCC poles 30/50 8 3X34 mm² AAAC 8 meter PSCC poles 30/50 9 2X34 mm² AAAC 8 meter PSCC poles X55mm² + 2x34 mm² AAAC RSJS x34 mm² AAAC 8 meter PSCC poles x55mm 2 +1x34mm 2 8 meter PSCC poles X34 mm² AAAC 8 meter PSCC poles x34 mm² AAAC 8 meter RSJS X34mm² AAAC 8 meter PSCC poles X55mm² + 1x30 mm² 8 meter PSCC poles 67 ACSR 2 3X55mm² + 2x30 mm² 8 meter PSCC poles 67 ACSR 3 5X30mm² ACSR 8 meter PSCC poles X50mm² + 1x30 mm² 8 meter PSCC poles 67 ACSR 5 3X30mm² ACSR 8 meter PSCC poles 67 Others 126

137 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, West Bengal 1 4X50mm² + 1x30 mm² 8 meter PCC poles 67 ACSR 2 5X30mm² ACSR 8 meter PCC poles X50mm² + 1x30 mm² ACSR 8 meter PCC poles X80mm² + 1x7/16 SWG S T Poles 40 steel wire 2 2X30mm² ACSR + 1x7/16 S T Poles 40 SWG Steel wire 3 3X30mm² ACSR+ S T Poles 40 1x7/16 SWG Steel wire 4 3X16mm² + 1x25 mm² AB S T Poles 50 cable 5 1X16mm² + 1x25 mm² AB S T Poles 50 cable (a) 3Ph 4wire line 1 50 mm² AAAC 8 meter PCC poles mm² AAAC 8 meter PCC poles mm² ACSR 8 meter PCC poles 95 (STW) 4 25 mm² AAAC ST Pole 45 (In hilly area) (b) 1Ph 2wire line 1 25 mm² AAAC 8 meter PCC poles mm² AAAC ST pole 45 (in hilly area) 10 CAEDCL, Assam (a) 3Ph 4wire line 1 Squirrel 7.5 meter PCC poles 50 (20 mm²) AAAC 2 Squirrel 7.5 meter RSJS 50 (20 mm²) AAAC 3 Squirrel 7.5 meter ST Poles 50 (20 mm²) AAAC (b) 1Ph 2/3 wire line 1 Squirrel 7.5 meter PCC poles 50 (20 mm²) AAAC 2 Squirrel 7.5 meter RSJs 50 (20 mm²) AAAC 3 Squirrel (20 mm²) AAAC 7.5 meter ST poles UAEDCL, Assam (a) 3Ph 4wire line 1 Squirrel 7.5 meter PCC poles 50 (20 mm²) AAAC 2 Squirrel 7.5 meter RSJs 50 (20 mm²) AAAC 3 Squirrel 7.5 meter ST Poles 50 (20 mm²) AAAC (b) 1Ph 2/3 wire line 1 Squirrel 7.5 meter PCC poles 50 (20 mm²) AAAC 2 Squirrel 7.5 meter RSJs 50 (20 mm²) AAAC 3 Squirrel 7.5 meter ST poles 50 (20 mm²) AAAC 12 CESU, Orissa 1 3X55mm² + 1x34mm 8 meter PSCC poles 50 AAAC 2 4X34 mm² AAAC 8 meter PSCC poles X34 mm² AAAC 8 meter PSCC poles X35+1X25 mm² AB cable 8 meter PSCC poles SOUTHCO, Orissa 14 PSEB, Punjab 1 5X55 mm² AAAC 8 meter PSCC poles X34 mm² AAAC 8 meter PSCC poles X34 mm² AAAC 8 meter PSCC poles X35+1X25 mm² AB cable 8 meter PSCC poles X30mm² ACSR 8 meter PCC poles X30mm² ACSR 8 meter PCC poles X20mm² ACSR 8 meter PCC poles X50mm² + 1x20 mm² 8 meter PCC poles 55 ACSR 5 3X30mm² ACSR + 8 meter PCC poles 67 1x20 mm² ACSR 6 4x20 mm² ACSR 8 meter PCC poles NDPL, Delhi 1 4x100mm 2 ACSR 9 meter PCC poles 127

138 16 BRPL, Delhi 1 4x100mm 2 ACSR 9 meter PCC poles 17 CSPDCL, 1 4x50+1x20mm 2 ACSR 8 meter PCC poles 60 Chhattisgarh 2 3x50+2x20mm 2 ACSR 8 meter PCC poles x50+1x mm 2 8 meter PCC poles 60 ACSR 4 3x50+1x20mm 2 ACSR 8 meter PCC poles x30+1x20mm 2 ACSR 8 meter PCC poles x30+1x20mm 2 ACSR 8 meter PCC poles x30+1x20mm 2 ACSR 8 meter PCC poles x50+2x30mm 2 ACSR 9.3 meter RS Joists x80+2x30mm 2 ACSR 9.3 meter RS Joists x30+1x20mm 2 ACSR 9.3 meter RS joists x20mm 2 ACSR 9.3 meter RS joists 45 A standard cost estimate for 1 km. of LT three phase 5 wire line (horizontal formation) 3X55 sk.mm + 2X34 sq. mm AAA conductor over 8 meters PSCC poles at 65 meters span, 75 kg/sq. mt. wind pressure is given in Annexure

139 Sl. No. Utility Table-5.6 Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths 3x55 mm 2 + 2x34 MM 2 AAAC on PSCC poles 50 to 65 meter span 5 wire line 34 mm 2 AAAC on PSCC poles 50 to 65 meter span 5 wire line 34 mm 2 AAAC on PSCC poles 50 to 65 meter span 3 wire line Cost of LT Lines 34 mm 2 AAAC on PSCC poles 60 to 70 meter span 4 wire 3x7/3.35 mm 2 + 1x7/2.59 ACSR RCC poles 60 meter span 4 wire 4x7/2.59 mm 2 ACSR on RCC poles 60 to 75 meter span 4 wire (Cost Rs. in lakhs / km) 3x7/2.59 mm 2 ACSR RCC poles 75 meter span 3 wire line 3x50/55 mm 2 + 1x30mm 2 AAAC/ACSR PSCC poles 50 to 70 meter span 4 wire line (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) APSPDCL, Andhra Pradesh 2.03 to to to to to to to to APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu UGVCL, Gujarat MGVCL, Gujarat MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, West Bengal 10 CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh Cost Range 2.03 to to to to to to to to to to to to

140 Sl. No. Utility Table-5.6 (contd.) Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths (Cost Rs. in lakhs / km) 20/25 mm 2 AAAC on PSCC poles 50 meter span 4 wire line 20/25 mm 2 AAAC on ST poles /RSJs 50 meter span 4 wire line Cost of LT Lines 20 mm 2 5x30 mm 2 ACSR AAAC/ACSR on on PSCC poles 50 PSCC poles on 95 to 70 meter span meter span 4 wire 5 wire line line 4x50/55 mm 2 AAAC on PSCC poles 50 to 70 meter span 4 wire line 3x30 mm 2 ACSR on ST poles 40 meter span 3 wire line 4x80 mm 2 ACSR on ST poles 40 meter span 3x35 mm 2 +1x25 mm 2 AB Cable on PSCC poles 35 to 60 meter span (11) (12) (13) (14) (15) (16) (17) (18) APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 1.90 to WBSEDCL, to West Bengal 2.83 * 10 CAEDCL, Assam * 3.32 to 3.92 to * 11 UAEDCL, Assam * 3.32 to 3.92 to * 2.10 to CESU, Orissa SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi BRPL, Delhi CSPDCL, Chhattisgarh Cost Range 2.05 to to to to to to 2.8 Benchmark costs for LT lines three phase 5 wire and 4 wire with 55 mm 2 /34 mm 2 AAAC / ACSR over PSCC/RCC supports Rs to 2.40 lakhs/km. Benchmark costs for LT lines 3 wire with 34 mm 2 AAAC / ACSR over PSCC/RCC supports Rs to 1.60 lakhs/km. The lines constructed over Rail poles, ST poles and PSCC poles with short span in Assam and UPCL and other utilities are brought separately under Benchmark costs. The costs would be Rs.5.5 to 6.4 lakhs for U mm 2 ACSR, Rs.3.50 to 4.00 lakhs for 20/25mm 2 AAAC. Such lines and specific lines with higher size conductor over special support etc. to be mentioned specifically by the utilities for approval of SERC/appropriate authority. NDPL and BRPL are constructing LT lines with 100mm 2 DOG, ACSR, the cost of which is high. This is not considered for benchmarking. * The costs are as per turnkey contracts to to to to to

141 It is seen from Table-5.6 the benchmark costs for LT three phase 4/5 wire lines would be Rs.2.00 lakh to Rs.2.40 lakh per km and that of LT single-phase 3 wire line would be Rs.1.30 lakh to Rs.1.60 lakh per km. The costs in UPCL would however, be Rs.4.50 lakh to Rs.5.20 lakh per km for three phase 4/5 wire line and Rs.2.00 to 3.20 lakh/km for single-phase 3 wire line. The costs of 4 wire line with 100mm 2 in NDPL and BRPL of Delhi would be Rs.5.5 to 6.4 lakhs per km. The LT lines constructed with higher size conductor in utilities in Delhi are not considered for benchmarking. (f) LT Underground System Five utilities (i) Central Power Distribution Company of Andhra Pradesh Limited (ii) Tamil Nadu Electricity Board and (iii) two Utilities in Delhi are using underground cable system. The cost of LT underground system includes the cost of cable, road cutting, laying of cable and road restoration charges. The road restoration charges are substantial and the charges have to be paid as levied by the respective Municipal Corporation and the distribution licensee has no control. The cost of cable and the road restoration charges are given in Table 5.6 (a) below: The costs include cost of all accessories, laying etc. Table-5.6 (a) Costs of LT Underground System S LT UG cable with LT UG cable with LT UG cable with 3 l. Name of the Utility 3 ½ x95 mm 2 XLPE ½ x120 mm 2 3 ½ x300 0 mm 2 XLPE N XLPE o APCPECL (i) Cost of cable, accessories laying, etc. (ii) Road restoration charges TNEB (i) Cost of cable, accessories laying etc. (ii) Road restoration charges NPDL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges etc. 4 BRPL, Delhi (i) Cost of cable, accessories laying etc. (ii) Road restoration charges

142 Since there is substantial difference in road restoration charges being levied by the Municipal Corporation from city to city on which utility has no control, it is considered appropriate to benchmark the cost of cable, cable laying including all accessories including road restoration charges. The benchmark costs for underground cable for for 3 ½ x300 mm 2 XLPE LT underground cable with all accessories and laying would be Rs.12 to 13 lakhs per Km. in Delhi. The benchmark costs for 3 ½ x120 mm 2 XLPE LT under ground cable with all accessories and laying could be Rs.4 to 5 lakh per Km. in TNEB. The benchmark costs for 3 ½ x95 mm 2 UG cable with all accessories and laying could be Rs. 4 to 5 lakhs per Km. in Andhra Pradesh /11 kv and 33/11 kv Substations (Receiving Stations) Different utilities are adopting different practices in the layout of 33/11 kv substations, power transformer capacities installed, number of 11 kv outgoing feeders, control room etc. The costs differ based on the practices followed by each utility. The practices followed by each of the utilities and methodology followed for benchmarking the costs are dealt below: (1) The utilities in Andhra Pradesh APSPDCL installs 1x5 MVA transformer with 2 to 4 outgoing 11 kv feeders initially, as the load develops they install second transformer. APCPDCL installs 1x5 MVA transformer in rural areas and 1 or 2x8 MVA or 2x5 MVA in urban areas with 3 to 5 outgoing 11 kv feeders. Provision is made to install second transformer later in the substations with single power transformer. The utilities do not provide 33 kv breakers either individual or group control on HV side if it is either single transformer or two transformers upto 5 MVA. Since the utilities are constructing large number of substations mostly in rural areas, they have simplified the layout of substations, with a small control room. No compound wall is constructed, only outer fencing is provided in rural areas. They also obtain land at no cost or at marginal cost as the consumers generally donate the land or Government land is acquired. The costs are generally low. The substations are totally outdoor in APSPDCL and some indoor substations mostly are constructed by APCPDCL in urban areas mostly in Hyderabad city. 132

143 (2) Tamil Nadu Electricity Board (TNEB) constructs both indoor and outdoor substations. The indoor substations are mostly in Chennai and other cities. The Board constructs the substation with 1x8 MVA or 2x8 MVA transformers with 3 to 4 outgoing 11 kv feeders. The land and control room costs are substantial. Wherever substation is constructed with single transformer initially, provision is made for installation of second transformer. In some substations the utility constructs staff quarters and these are not considered for benchmarking costs. (3) The utilities in Gujarat UGVCL and MGVCL do not handle 33 kv system and hence no 33/11 kv substations are constructed. (4) The utilities in Madhya Pradesh MPPKVVCL and MPMKVVCL construct 33 /11 kv substations with 1x1.6 MVA or 1x3.15 MVA or 1x5 MVA transformers initially with 2 to 3 outgoing 11 kv feeders and add second transformer or replace the existing transformer with higher capacity transformer as load develops. Provision is made in the substation for installation of second transformer. The layout is fairly simple. (5) UPCL, Uttaranchal constructs the substations with 1x3.15 MVA or 1x5 MVA or 1x8 MVA transformer, based on the load. Second transformer is added later based on load development for which provision is made in the layout. (6) Punjab Electricity Board does not have 33 kv system under distribution. However 66/11 kv substations are considered for this study. PSEB installs 1x8 MVA or 1x12.5 MVA or 1x20 MVA transformer initially later adds additional transformer or up-rate it with higher capacity transformer. Provision is made in the layout to install second transformer later. (7) West Bengal State Electricity Distribution Company Limited (WBSEDCL) constructs the substations with 2x3.15 MVA or 2x5 MVA transformers. The utility constructs substations partly indoor and partly outdoor. The transformers and 33 kv switchgear etc., is outdoor and 11 kv switchgear installed indoor. The layouts are extensive and also the control rooms are fairly large. Hence the cost of land, control room, land development costs etc., are high. The land acquired is stated to be one and half acres against half an acre acquired in Andhra Pradesh. However the cost of the land is not considered for benchmarking, as the extent and value of the land differs from state to state. The value of land has to be considered as per the State Government norms. (8) The two utilities in Assam - the Central Assam Electricity Distribution Company and Upper Assam Electricity Distribution Company construct the 33/11 kv substations with 1x2.5 MVA or 2x2.5 MVA or 1x3.15 or 1x5 MVA or 2x5 MVA transformers based on the load development in a particular area. 133

144 The substation layouts have provision for installation of second transformer where a single transformer is installed initially. (9) The utilities in Orissa the Central Electricity Utility (CESU) and the Southern Electric Supply Company construct the 33/11 kv substations with a single 3.15 or 5.0 MVA power transformer with provision for erection of a 2 nd power transformer later. In urban areas like Bhubaneswar, Cuttak etc. the substations are erected with one or two 8 MVA power transformers with individual HV breaker control and indoor switchgear for transformer LV side and 11 kv feeders control and protection. In SOUTHECO, wherever two power transformers are erected, a 33 kv group control breaker is provided on HV side. (10) BRPL, Delhi constructs 66/11 kv substations with 2x25 MVA power transformers and 33/11 kv indoor substations with 2x20 MVA power transformers. In both the cases the 11 kv capacitor banks are erected. In NDPL, Delhi 66/11 kv substations with 2x20/25 MVA power transformers and capacitor bank are constructed. (11) Chhattisgarh State Power Distribution Company Limited (CSPDCL) constructs 33/11 kv outdoor substations with 1x1.6 MVA or 1x3.15 MVA or 1x5.0 MVA power transformers depending on the existing demand. Provision is made in the layout for erection of a second transformer at a later date depending on the load development. 11 kv capacitor banks of 600 kvar and 1200 kvar are installed at the substations for reactive compensation. BENCHMARKING COSTS OF 33/11 KV SUBSTATIONS The costs obtained from various utilities are discussed in Chapter-4. As mentioned earlier the costs obtained are validated wherever required. The costs obtained are segregated into cost of (i) civil works (ii) equipment and material costs including cabling etc., and (iii) overheads transport, erection, supervision, testing and commissioning, etc. It is observed that the equipment, cabling costs etc., are fairly comparable across the utilities. The cost of civil works are substantially high in some cases, particularly in West Bengal. However, total costs including (i) civil works (ii) equipment and erection costs and (iii) overheads are considered together to benchmark costs. The costs of land and staff quarters, provided in some cases are not considered for comparison of costs and benchmarking as the land costs differ from state to state. Since the capacitor banks are not installed in all substations, the cost of capacitor bank is added separately. 134

145 The practices followed by the utilities in construction of substations are given in Table-5.7 and the comparative costs 33/11 kv substations in Tables-5.8 and The costs of 66/11 kv substations are analysed in para (c). Table /11 kv and 33/11 kv Substations (Outdoor) Sl. No. Utility 1 APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh Voltage & capacity of transformers Number of outgoing feeders Availab ility of capacit or bank 1 33/11kV, 1X5MVA 3 Yes 2 33/11kV, 1X5MVA 2 No 3 33/11kV, 1X5MVA 4 Yes 1 33/11kV, 1X5MVA 3 Yes 2 33/11kV, 1X5MVA 2 No 3 33/11kV, 1X5MVA 4 Yes 4 33/11kV, 2X5 MVA 5 Yes 5 33/11kV, 2x8MVA 6 Yes 3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 1 33kV substations are not in existence 5 MGVCL, Gujarat 1 33kV substations are not in existence 6 MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, West Bengal 10 CAEDCL, Assam 11 UAEDCL, Assam 1 33/11kV, 1X8MVA 3 Yes 2 33/11kV, 2X8MVA 3 Yes 1 33/11kV, 1X1.6 MVA 2 No 2 33/11kV, 1X3.15 MVA 3 Yes 3 33/11kV, 1X5 MVA 3 Yes 1 33/11kV, 1X1.6 MVA 2 No 2 33/11kV, 1X3.15 MVA 3 Yes 3 33/11kV, 1X5 MVA 3 Yes 1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5MVA 4 No 3 33/11kV, 1X8MVA 4 No 1 33/11kV, 2X3.15MVA 4 No 2 33/11kV, 2X6.3MVA 6 No 1 33/11kV, 1X2.5MVA 4 No 2 33/11kV, 2X2.5MVA 6 No 3 33/11kV, 1X3.15MVA 6 No 4 33/11kV, 2X5.0MVA 6 No 1 33/11kV, 1X2.5MVA 4 No 2 33/11kV, 2X2.5MVA 6 No 3 33/11kV, 1X3.15MVA 6 No 4 33/11kV, 2X5.0MVA 6 No 12 CESU, Orissa 1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5.00 MVA 3 No 3 33/11kV, 1X8.0 MVA 5 No 13 SOUTHCO, Orissa 14 PSEB, Punjab 1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5.00 MVA 3 No 3 33/11kV, 2X3.15MVA 3 No 1 66/11kV, 1X20MVA 8 No 2 66/11kV, 1X12.5MVA 6 No 3 66/11kV, 1X8MVA 5 No 15 NDPL, 1 66/11 kv 2x20 MVA 10 Yes Delhi 2 66/11 kv 2x25 MVA 10 Yes 16 BRPL, Delhi 1 66/11 kv 2x25 MVA 25 Yes 17 CSPDCL, Chhattisgarh 1 33/11 kv 1x1.16 MVA 2 Yes 2 33/11 kv 1x3.15 MVA 2 Yes 3 33/11 kv 1x5.0 MVA 3 Yes A standard layout and cost estimate for 33/11kV substation with 2X5 MVA power transformers are given in Annexure-5.5 (a) & 5.5 (b). Others 135

146 Sl. No. Utility 1x5 MVA transformer with 2 to 4 11 kv feeders and capacitor bank 2x5 MVA transformers with 5 to 6 11kV feeder and capacitor bank Table-5.8 Costs of 33/11 kv Substation (Outdoor) 1x8MVA transformers 3 to 4 outgoing feeders Cost of 33/11 kv Substation 2x8 MVA transformers 5 to 6 11 kv outgoing feeders 1x1.6 MVA CAGR power transformers 1x3.15 MVACAGR Transformers with 3 to 6 outgoing feeder (Cost Rs. in lakhs) 2x3.15 MVA transformer with 4 to 6 outgoing feeders 2x6.3 MVA transformers with 4 to 6 outgoing feeders (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) APSPDCL, Andhra Pradesh to 2 APCPDCL, Andhra Pradesh to to to to to TNEB, Tamil Nadu UGVCL, Gujarat No 33/11 kv substations 5 MGVCL, Gujarat No 33/11 kv substations 6 MPPKVVCL, Madhya Pradesh MPMKVVCL, 7 Madhya Pradesh UPCL, Uttarkhand WBSEDCL, West Bengal to * 10 CAEDCL, Assam UAEDCL, Assam CESU, Orissa SOUTHCO, Orissa PSEB, Punjab No 33/11 kv substations 15 NDPL, Delhi No 33/11 kv substations 16 BRPL, Delhi No 33/11 kv substations 17 CSPDCL, Chhattisgarh Cost Range 70 to to to to to to 180 Note: All substations with single transformer have provision to install second transformer. + The cost includes 11 kv indoor VCB 13 panel control board to to to to to *

147 Sl. No. Utility 1 APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 1x2.5 MVA transformer with 4 outgoing feeder Table-5.8 (contd.) Costs of 33/11 kv Substation (Outdoor) (Cost Rs. in lakhs) 2x2.5 MVA transformers with 4-6 outgoing feeders Cost of 33 kv Substation 2x5.0 MVA transformers with 4-6 outgoing feeders (11) (12) (13) MGVCL, Gujarat MPPKVVCL, 6 Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, West Bengal 10 CAEDCL, Assam to * 11 UAEDCL, Assam to * 12 CESU, Orissa 13 SOUTHCO, Orissa 14 PSEB, Punjab 15 NDPL, Delhi 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh Cost Range to 274 Note: All substations with single transformers have provision to install second transformer. Benchmark costs for 33/11 kv substations outdoor depends on the capacity of the power transformer (s) in the substation. The benchmark cost would be as under Substation with 1x1.6 MVA Rs.54 to Rs.55 lakhs / SS Substation with 2x3.15MVA Rs.110 to 125 lakhs / SS (WBSEDCL-180 to 250) 1x3.15 MVA Rs.77 to Rs.84 lakhs/ss 2x5 MVA Rs.135 to Rs,155 lakhs/ss 1x5.0 MVA Rs.85 to Rs.100 lakhs/ss 2x6.3 MVA Rs.190 to Rs.260 lakhs/ss (This is specific to WBSEDCL) 1x8MVA Rs.140 to Rs.170 lakhs 2x8 MVA Rs.185 to RS.240 lakhs/ss The substation in hilly areas constructed by the utilities in Assam with 1x2.5 MVA, 1x3.15 MVA, 2x2.5 MVA and 2x5 MVA are much on the higher side and hence separate benchmarking is considered as follows: 1x2.5 MVA Rs.144 to Rs.168 lakhs / SS 2x3.15 MVA Rs.170 to Rs.180 lakhs/ss 2x2.5 MVA Rs.160 to Rs.196 lakhs/ss 2x5.0 MVA Rs.250 to Rs.274 lakhs/ss * The costs are as per turnkey contracts. 137

148 It is seen from Table-5.8 the costs of substations with similar capacity are compared and cost range is obtained capacity-wise and the benchmarking costs are arrived across various utilities, except Uttarkhand, West Bengal and Assam where the costs are high due to large control room and construction costs etc., being high. The benchmark cost for 33/11 kv substations (outdoor) work out to as under for various transformer capacities: Substation with 1x1.6 MVA Rs.54 to Rs.55 lakhs / SS 1x3.15 MVA Rs.77 to Rs.84 lakhs/ss 1x5.0 MVA Rs.85 to Rs.100 lakhs/ss 1x8MVA Rs.140 to Rs.170 lakhs 2x3.15MVA Rs.110 to Rs.125 lakhs / SS 2x5 MVA Rs.135 to Rs,155 lakhs/ss 2x6.3 MVA Rs.210 to Rs.260 lakhs/ss (This is specific to WBSEDCL) 2x8 MVA Rs.185 to RS.240 lakhs/ss The distribution companies have to indicate the cost of land separately and authority for such costs. (a) 33/11 kv Substations (Indoor) APCPDCL and TNEB have 33/11 kv indoor substations with transformer capacities of 5 MVA or 8 MVA. The utilities in Delhi have 66/11 kv substations. 33/11 kv substations are not being constructed at present. The details of 33/11 kv indoor substations being constructed and the costs are given in Tables-5.9 and 5.10 respectively. Sl. No. Utility 1 APCPDCL, Andhra Pradesh 2 TNEB, Tamil Nadu Table /11 kv Substations (Indoor) Voltage & capacity of transformers Number of outgoing feeders Availability of capacitor bank 1 33/11kV, X5MVA 5 Yes 2 33/11kV, X8MVA 6 Yes 1 33/11kV, 1X8 VA 4 Yes 2 33/11kV, 2X8 MVA 6 Yes 138

149 Sl. No. Utility Table-5.10 Costs of 33/11 kv Substation (Indoor) (Cost Rs. in lakhs) Cost of 33/11 kv Substation 2x5 MVA 2x8 MVA 1x8 MVA 2x8 MVA transformers transformers transformers transformers 5 to with 5 to 6 with 5 to 6 with 4 Nos. 11kV 6 Nos. 11 kv Nos. 11 kv Nos. 11 kv out out going outgoing feeders outgoing going feeders feeders feeders (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh TNEB, Tamil Nadu UGVCL, Gujarat 5 MGVCL, Gujarat MPPKVVCL, 6 Madhya Pradesh MPMKVVCL, 7 Madhya Pradesh 8 UPCL, Uttarkhand WBSEDCL, 9 West Bengal 10 CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa 13 SOUTHCO, Orissa 14 PSEB, Punjab 15 NDPL, Delhi 16 BRPL, Delhi 16 CSPDCL, Chhattisgarh Cost Range The Benchmark costs 33/11 kv Substation (Indoor) could be as under: Substation with 2x5 MVA Rs.235 to 240 lakhs per SS 1x8 MVA Rs.181 to 200 lakhs per SS 2x8 MVA Rs.350 to 370 lakhs per SS 139

150 As seen from the Table-5.10 the benchmark cost of 33/11 kv substation (indoor) with 2x5 MVA transformers would be Rs.235 lakh to Rs.240 lakhs. The benchmark costs would Rs.350 lakh to Rs.370 lakh for 2x8MVA. For a substation with 1x8 MVA power transformer capacity, benchmark costs are Rs.180 to 190 lakhs per substation Distribution Transformer Stations The utilities construct Distribution transformer stations with different transformer capacities as given below: - 15/16 kva single phase - 16 kva, 25 kva, 63 kva, 100 kva, 200 kva, 250 kva and 500 kva three phase The most commonly installed transformers are 15/16 kva single phase, 16/25 kva, 63 kva and 100 kva three phase. In few cases, mostly in urban areas, the utilities install 200 kva, 250 kva and 500 kva transformers. The utilities in Andhra Pradesh normally install the distribution transformers upto 100 kva on single pole structure or on a plinth and the other utilities on a double pole structure. The costs obtained include the cost of transformer, cost of structure, AB switch, LAs, cabling, installation, etc. The costs of distribution transformer stations are compared transformer capacity wise. Except one or two, no utility is purchasing amorphous core and BEE star rating transformers at present. The capacities of distribution transformers installed by various utilities are given in Table-5.11 and the costs obtained in Table Table-5.11 Distribution Transformer Stations (Outdoor) Sl. No. Utility Voltage Capacity of transformers Type 1 APSPDCL, 1 11kV/230V 15KVA Single phase Andhra Pradesh amorphous core 2 11kV/230V 15KVA Single phase oil immersed 3 11kV/433V 63KVA Three phase CSP 4 11kV/433V 63KVA Three phase amorphous core 5 11kV/433V 100 KVA Three phase CSP 6 11kV/433V 100 KVA Three phase amorphous core 2 APCPDCL, 1 11kV/230`V 15/16KVA Single phase 140

151 Andhra Pradesh 2 11kV/433V 25 KVA Three phase 3 11kV/433V 63 KVA Three phase 4 11kV/433V 100 KVA Three phase 3 TNEB, Tamil Nadu 1 11kV/433V 63 KVA Three phase CSP 2 11kV/433V 100 KVA Three phase CSP 3 11kV/433V 250 KVA Three phase CSP 4 11kV/433V 500 KVA Three phase CSP 5 22kV/433V 63KVA Three phase CSP 6 22kV/433V 100KVA Three phase CSP 7 22kV/433V 200KVA Three phase CSP 8 22kV/433V 250KVA Three phase CSP 4 UGVCL, Gujarat 1 11kV/433V 25KVA Three phase CSP 2 11kV/433V 63KVA Three phase CSP 3 11kV/433V 100KVA Three phase CSP 4 22kV/433V 63KVA Three phase CSP 5 22kV/433V 100KVA Three phase CSP 5 MGVCL, Gujarat 1 11kV/433V 25KVA Three phase CSP 2 11kV/433V 63KVA Three phase CSP 3 11kV/433V 100KVA Three phase CSP 6 MPPKVVCL, Madhya Pradesh 7 MPMKVVCL, Madhya Pradesh 1 11kV/433V 16KVA Three phase CSP 2 11kV/433V 25KVA Three phase CSP 3 11kV/433V 63KVA Three phase CSP 4 11kV/433V 100KVA Three phase CSP 5 11kV/433V 200KVA Three phase CSP 1 11Kv/433V 16KVA Three phase 2 11kV/433V 25KVA Three phase 3 11kV/433V 63KVA Three phase 4 11kV/433V 100KVA Three phase 8 UPCL, Uttarkhand 1 11kV/433V 25KVA Three phase 2 11kV/433V 63 KVA Three phase 3 11kV/433V 100 KVA Three phase 4 11kV/433V 250 KVA Three phase 5 11kV/433V 400 KVA Three phase 9 WBSEDCL, West Bengal 1 11/0.4kV 10 KVA Three phase 2 11/0.4kV 25 KVA Three phase 3 11/0.4kV 63 KVA Three phase 4 11/0.4kV 100 KVA Three phase 10 CAEDCL, Assam 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase 11 UAEDCL, Assam 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase 12 CESU, Orissa 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase 13 SOUTHCO, Orissa 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase 14 PSEB, Punjab 1 11kV/433V 25KVA Three phase 2 11kV/433V 63 KVA Three phase 3 11kV/433V 100 KVA Three phase 4 11kV/433V 200 KVA Three phase 5 11kV/433V 250 KVA Three phase 141

152 15 NDPL, Delhi 1 11kV/433V 63 KVA Three phase 2 11kV/433V 160 KVA Three phase 3 11kV/433V 315 KVA Three phase 4 11kV/433V 400 KVA Three phase 5 11kV/433V 630 KVA Three phase 6 11kV/433V 990 kva Three phase 16 BRPL, Delhi 1 11kV/433V 100 kva Three phase 2 11kV/433V 400 kva Three phase 3 11kV/433V 660 kva Three phase 4 11kV/433V 990 kva Three phase 17 CSPDCL, Chhattisgarh 1 11kV/433V 25 kva Three phase 2 11kV/433V 63 kva Three phase 3 11kV/433V 100 kva Three phase 4 11kV/433V 200 kva Three phase 5 11kV/433V 315 kva Three phase 6 11kV/433V 500 kva Three phase A standard cost estimate for one number 100KVA distribution transformer station is given in Annexure

153 Table-5.12 Distribution Transformer stations (Outdoor)(Cost Rs. in lakhs) Sl. Utility Cost of Transformers Station (outdoor) 15/16 kva single phase CRGO core transformers 16/25 kva three phase CRGO transformers 63 kva CSP transformers 100 kva CSP transformers 100 kva Amorphous core transformers 200/250 kva CRGO transformers 315/400 kva CRGO Transformers 990 kva Transformers (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) APSPDCL, Andhra Pradesh APCPDCL, Andhra Pradesh TNEB, Tamil Nadu UGVCL, Gujarat MGVCL, Gujarat MPPKVVCL, Madhya Pradesh 1.04 to 1.09 to MPMKVVCL, Madhya Pradesh 1.11 to 1.32 to UPCL, Uttarkhand WBSEDCL, West Bengal CAEDCL, Assam UAEDCL, Assam CESU, Orissa SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi BRPL, Delhi CSPDCL, Chhattisgarh Cost Range 0.4 to to to to to to to to to to to The Benchmark costs for Distribution Transformer Stations (Outdoor) based on transformer capacity for other than Assam are as under. 15/16 kva single phase Rs.0.40 to 0.60 lakhs per each. 100 kva three phase Rs.1.90 to 2.20 lakhs per each 16/25 three phase Rs.1.00 to 1.40 lakhs per each. 200/250 kva three phase Rs.3.0 to 3.2 lakhs per each. 63 kva three phase rs.1.60 to 2.00 lakhs per each. 990 kva three phase Rs to lakhs per each. For hilly stations like Assam, the benchmarks are as follows: 15/16 kva single phase Rs.1.36 to 1.61 lakhs per each. 16/25 three phase Rs.1.69 to 2.00 lakhs per each. 63 kva three phase rs.2.00 to 2.42 lakhs per each. 100 kva three phase Rs.2.42 to 2.56 lakhs per each 200/250 kva three phase Rs.5.37 lakhs per each. 350/400 kva three phase Rs.7.00 to 8.00 lakhs per each. 143

154 It is seen from Table 5.12 that the range of benchmark costs for each distribution transformers stations with different capacities of transformers would be as under: 15/16 kva Single phase Rs lakhs to Rs.0.60 lakhs 16/25 kva Three phase Rs lakhs to Rs.1.40 lakhs 63 kva Three phase Rs lakhs to Rs.2.00 lakhs 100 kva Three phase Rs lakhs to Rs.2.20 lakhs 200/250 kva Three phase Rs lakhs to Rs.3.20 lakhs 315/400 kva Three phase Rs lakhs to Rs.8.00 lakhs (State specific to Delhi and Uttarkhand) 990 kva Three phase Rs lakhs to Rs lakhs (State specific to Delhi) High Voltage Distribution System (HVDS) HVDS is extensively being implemented in APSPDCL and APCPDCL of Andhra Pradesh. Though estimates are sanctioned for implementing the HVDS in Madhya Pradesh the works are not actually completed. Hence the costs of APSPDCL where number of works are completed are taken for benchmarking. The cost of 16 and 25KVA transformers and conversion costs are given in Table 5.13 below: The following are the conversion costs of HVDS in APSPDCL. Table 5.13 Conversion cost of HVDS S.N Details Cost per unit (Rs.) 1. Conversion of LT line into 11kV (HVDS) line (Per KM) 29, Supply and erection of 16 KVA copper wound 70,720 distribution transformer, with all the accessories (each) 3. Supply and erection of 25 KVA copper wound 88,650 distribution transformer, with all the accessories (each) 4. Supply and erection of LT AB cable (3X16+25mm²) per 49,670 KM 5. Replacing the existing 50/63/100 KVA transformers and handing over to district stores (each). 1,050 The net conversion costs for converting LT line under existing 63 and 100 KVA transformers to 11kV and replacing the 63 or 100 KVA transformer with small capacity transformers and giving credit to the released transformer is given in Table

155 Table-5.14 Conversion costs of HVDS, replacing different capacities of existing transformers (Rs. in lakhs) S.N Details Cost obtained / validated and Conversion of LT line to 11kV and replacement of 100 KVA transformer with required number of 25 KVA transformers. 2. Conversion of LT line to 11kV and replacement of 63 KVA 6.39 transformer with required number of 25 KVA transformers. 3. Conversion of LT line to 11kV and replacement of 50 KVA 5.08 transformer with required number of 25 KVA transformers. 4. Conversion of LT line to 11kV and replacement of 100 KVA transformer with required number of 16 KVA transformers. 5. Conversion of LT line to 11kV and replacement of 63 KVA 8.63 transformer with required number of 16 KVA transformers. 6. Conversion of LT line to 11kV and replacement of 50 KVA transformer with required number of 16 KVA transformers The benchmarks costs for HVDS for different items can be as follows. 1. Conversion of LT line into 11kV (HVDS) line (Per KM) could be Rs. 29,000 to 30, Supply and erection of 16 KVA copper wound distribution transformer, with all the accessories (each) could be Rs. 70,000 to 71, Supply and erection of 25 KVA copper wound distribution transformer, with all the accessories (each) could be Rs. 88,000 to 90, Supply and erection of LT AB cable (3X16+1x25mm²) per KM could be Rs. 49,000 to 50, Replacing the existing 50/63/100 KVA transformers and handing over to district stores could be Rs to Rs Conversion of LT lines to 11kV and replacement of 100 KVA transformer with required number of 25 KVA transformers could be Rs. 10 to 11 lakhs. 7. Conversion of LT line to 11kV and replacement of 63 KVA transformer with required number of 25 KVA transformers could be Rs. 6 to 7 lakhs. 8. Conversion of LT line to 11kV and replacement of 50 KVA transformer with required number of 25 KVA transformers could be Rs. 5 to 6 lakhs. 9. Conversion of LT line to 11kV and replacement of 100 KVA transformer with required number of 16 KVA transformers could be 13 to 14 lakhs. 10. Conversion of LT line to 11kV and replacement of 63 KVA transformer with required number of 16 KVA transformers could be Rs. 8 to 9 lakhs. 145

156 11. Conversion of LT line to 11kV and replacement of 50 KVA transformer with required number of 16 KVA transformers could be Rs. 6 to 7 lakhs kv System and 66/11 kv Substations As discussed in chapter-4, the 66 kv network system comes under the control of distribution companies NDPL and BRPL in Delhi. In the case of PSEB, an integrated utility, the 66 kv lines are considered under distribution business, since no 33 kv lines are presently being executed by them. (a) 66 kv overhead lines There are no 66 kv overhead lines managed by the distribution utilities other than PSEB. The benchmark costs of 66 kv lines of PSEB are as indicated below: i. 66 kv DC line on DC towers with 200 mm 2 /150 mm 2 ACSR with 250 meter span. ii. 66 kv SC line on DC towers with 200 mm 2 /150 mm 2 ACSR with 250 meter span. iii. 66 kv SC line on SC towers with 200 mm 2 /150 mm 2 ACSR with 300 meter span. Rs.18 to 22 lakh per km. Rs.13 to 15 lakh per km. Rs.9 to 14 lakh per km. The above benchmarks are state specific applicable to Punjab. (b) 66 kv Underground Cable System The 66 kv underground cable system is implemented only by Delhi utilities NDPL and BRPL. The benchmark costs for the 66 kv underground cable system applicable to Delhi could be as indicated below: i. 66 kv underground cable line with 1CX1000 mm 2 XLPE cable. ii. 66 kv underground cable line with 1CX630 mm 2 XLPE cable. Rs.170 to 180 lakhs per km. Rs.80 to 90 lakhs per km. The underground cable system costs vary from place to place and the benchmarks referred above are state specific to Delhi. (c) 66/11 kv Substations The 66/11 kv substations of Delhi utilities NDPL and BRPL are not considered for benchmarking, as the costs are considered high and the details of the costs are not made available. The costs of 66/11 kv outdoor substations of PSEB are as indicated below: 146

157 i. 1x20 MVA transformer and 8 Nos. 11 kv outgoing feeders ii. 1x12.5 MVA transformer and 6 Nos. 11 kv outgoing feeders iii. 1x8 MVA transformer and 5 Nos. 11 kv outgoing feeders Rs.370 lakhs Rs.305 to 310 lakhs Rs.195 to 200 lakhs Metering Equipment and Meters The costs of metering equipment at 33 kv and 11 kv and the meters installed at HT and LT installations - three phase and single phase are given in Table-5.15 below: 147

158 Sl. No. Utility 33 kv metering equipment CTs and Pts Table-5.15 Cost of Metering Equipment and Meters ( Rs.per item) Cost of Metering Equipment and Meters 11 kv Trivector 33 kv 11 kv metering meters metering unit metering unit equipment (3+5) (4+5) (CTs and PTs) 3 phase meters whole current Single phase meters (1) (2) (3) (4) (5) (6) (7) (8) (9) APSPDCL, Andhra Pradesh APCPDCL, Andhra Pradesh TNEB, Tamil Nadu UGVCL, Gujarat MGVCL, Gujarat MPPKVVCL, 6 Madhya Pradesh MPMKVVCL, Madhya 7 Pradesh 8 UPCL, Uttarkhand WBSEDCL, West Bengal CAEDCL, Assam UAEDCL, Assam CESU, Orissa to to SOUTHCO, Orissa PSEB, Punjab NDPL, Delhi BRPL, Delhi 17 CSPDCL, Chhattisgarh Cost Range to to to to to to to to to to to to to to 900 The Benchmark cost for Metering Equipment and Meters are as under: 33 kv metering unit including meter Rs.45,000 to 60,000/unit Trivector meter Rs.3800 to 5000 / unit 3 phase meters Rs to 1800 / unit 11 kv metering unit including meter Rs.32,000 to 43,000 / unit Single phase meters Rs.450 to 900 / unit 148

159 It is seen that the benchmark costs of metering 33 kv,11 kv and LT consumers would be as under. 33 kv Metering Rs to Rs kv Metering Rs to Rs Trivector meters Rs.3800 to Rs.5000 LT three phase meters Rs.1300 to Rs.1800 LT single phase meters Rs.450 to Rs Service Line Costs The service line costs furnished by various utilities are given in Table-5.16 below: Table-5.16 Service Line Costs(LT) (in Rs.) Single S. No Utility phase Three phase Three phase Non-domestic and Street Domestic & Domestic Industrial light Nondomestic Agriculture Upto 5 HP 5 Hp to 20 HP Above 20 HP 1 APSPDCL APCPDCL TNEB UGVCL to MGVCL to MPPKVVCL Data not received 7 MPMKVVCL Data not received 8 UPCL Data not received 9 WBSCDCL CAEDCL CAEDCL CESU SOUTHCO PSEB * NDPL to BPRL to * without meter. The benchmark costs of service line (LT) would be as under : Single phase domestic and non- domestic Rs to 3000 Three phase domestic Rs to 7000 Three phase non-domestic and industrial i) upto 20 HP Rs to 9000 ii) Above 20 HP Rs to Street Lights Rs to 2600 Agriculture Rs to 5000 A standard arrangement for service connections and the cost estimates are given in Annexures 5.6(a) to 5.6(j). The service line costs for HT are to be considered, case to case basis depending on the length and size of cable, requirement of equipment etc. 149

160 5.3.8 Norms for other Overheads The cost of overheads such as labour charges, transportation, supervision, contingences etc., being adopted by various utilities in their cost estimates are given in Table-5.17 below in terms of percentage of estimates cost. Table-5.17 Overhead costs adopted by various utilities S. N Utility Storage and handling charges Labour & transport charges Estt & General charges Conting encies T&P on materials 1. APSPDCL - 10% 10% 3% 1% 2. APCPDCL 3% 10% 10% 3% - 3. TNEB - 15% 15% 1% - 4. UGVCL 2% 10% 15% MGVCL 2% 10% 15% 3% 2% 6. MPPKVVCL 2.5% 5-20% 2.5% 5% 1.5% 7. MPMKVVCL 2.5% 5-20% 2.5% 5% 1.5% 8. UPCL % 15% 3% - 9. WBSEDCL % 15% 5% - Overhead charges 10. CAEDCL - 40% on 15% 3% - material 11. UAEDCL - 40% on 15% 3% - material 12. CESU 3% 17.5% - 3% 2% 6% 13. SOUTHCO 3% 17.5% - 3% 2% 6% 14. PSEB, Punjab 2.5% Labour 10% 1% 1.5% - lumpsum Transport- 2.5% 15. NDPL, Delhi % 3% BRPL, Delhi % 3% CSPDCL, Chhattisgarh 2.5% Lump sum 2.5 5% 1.5% - But on analysis of the actual costs involved in the execution of different elements it is found that overall overhead costs like stores handling, labour, transport, supervision and Estt. Charges etc, as a whole vary from one element to another in distribution business. Where the material and equipment costs involved are high the overhead costs, as a percentage of total costs have to be less. Thus, the following overhead costs for different elements are found to be reasonable. 150

161 33/11 kv Sub-stations 18% of the total costs Distribution Transformer Stations 15% of the total cost 33 kv and 11 kv lines 28% of total cost LT Lines 30% of total cost Service connections (LT) 25% of total cost 151

162 Annexure Standard cost estimate per km of 33 kv line with 100 Sq.mm AAA Conductor Over 9.1 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 280 kgs at the rates ruling during S.No Particulars Qty Rate in Rs. Per Unit Amount in Rs M PSCC Poles Each M Channel / 'V' Cross Arm Each Top Clamp with Cleat Each Back Clamps Each Stay sets complete Each Bracing set with double cross arm Set Sq. mm AAA Conductor KM kv Pin - Insulator with Pin Each Strain Insulator set with (3X11kV B&S insulator with 33kV hard ware fitting) 10 Concerting of poles, stay sets & Base concreting 11 Misc. Items like coil earthing, pipe earthing, danger-boards, bolts & nuts etc Set 4338 LS LS LS LS 4500 Total Contingencies (3% on items 1 to 9) 7350 Total cost of materials *Labour, transport, Estt & supervision and other charges(28%) Total cost * As recommended in the report. 152

163 Annexure Standard cost estimate per km of 11 kv line with 55 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 60 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during S.No Particulars Qty Rate in Rs. Per Unit Amount in Rs M PSCC Pole Each M Channel / 'V' cross arm Each Top Clamp with Cleat Each Back Clamps Each Stay sets complete Each Bracing set with double cross arm Set Sq. mm AAA Conductor KM kv Pin - Insulator with Pins Each Strain Insulator set with metal parts Each Concerting of poles, stay sets & Base concreting 11 Misc. Items like coil earthing, pipe earthing. Danger-boards, bolts & nuts etc. LS LS LS LS 4000 Total Contingencies (3% on items 1 to 9) 4234 Total Cost of Material *Labour, transport, Estt & supervision and other charges(28%) Total cost * As recommended in the report. 153

164 Annexure Standard cost estimate per km of LT 3- Ph 5 wire line (Horizontal formation) 3x55 Sq.mm + 2 x34 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during S.No Particulars Qty Rate in Rs. Per Unit Amount in Rs M PSCC Pole Each LT 3 Phase cross arms Each LT top fitting Each Back Clamp Each Stay sets complete Each Sq. mm AAA Conductor KM Sq. mm AAA Conductor KM Shackle Insulator with metal parts Each LT pin insulator with pin Each CI Knob Each Concerting of pole, stay sets & Base concreting 12 Misc. Items like coil earthing, pipe earthing. Danger-boards, bolts & nuts etc. LS LS 3000 Total Contingencies (3% on items 1 to 10) 4600 Total Cost of Material *Labour, transport, Estt & supervision and other charges(30%) Total Cost * As recommended in the report. 154

165 Annexure Standard cost estimate for 100KVA distribution transformer station at the rates ruling during S.N Particulars Qty Rate in Rs. Per Unit Amount in Rs M RCC poles E Base plates 2 62 E Transformer structure materials including of structure clamps Set KV AB Switch (200Amps) Set kV HG Fuse Set kV LAs E Dist. transformer 100 KVA, 11kV/433V E CI Pipe earthing (3 Nos.) E Stay sets Set Guy insulators 4 10 E Jumpering materials Set Concreting LS LT LAs E LT metering arrangement with CTs including cables connections, cleat arrangement Set LT fixed capacitor 2X9 KVAR unit Set Bolts, nuts, binding wire etc. (Bolts & Nuts 2.5"x5/8" - 10Kg + Binding wire 10 SWG - 5Kg) LS 810 Total Contingencies 3% 4983 Total Cost of materials *Labour, transport, Estt & supervision and other charges(15% of total cost) Grand Total * As recommended in the report. 155

166 Annexure (a) Detailed Estimate For Erection of 33/11 kv Sub-Station with 2 x 5 MVA Power Transformers and NF = 4 Nos. 11 kv Feeders S.No Particulars Qty Rate Amount (Rs. in Unit (Rs. in lakhs) Lakhs) 1 Control Room Cum Consumer Service Centre LS LS (including furniture) 2 Station Auxillaries a Peripheral, Security Fencing, Approach road, LS LS retaining wall around switchward with gravel filling gate and borewell b Yard Lighting LS LS c Fire Fighting Equipment LS LS d P&T Phone and Wireless set LS LS Foundations for structures, PTRs & breakers LS LS Bus bar, Jumpers, Connectors Clamps etc LS LS Control Cables LS LS Structural Steel LS MT Transformer a 33/11 kv 5 MVA Power Transformer Each b 11 kv / 433 V 16 kva Stn. Transformer Each Circuit Breakers (including Trivector Meter) a 33 kv GVCB Each b 20 ka 11 kv Feeder VCB including Control panel Each (NF=4) c 20 ka 11 kv LV VCB including Control Panel Each Control Circuit Panels a AC Supply Panel Each b Alarm Panel Each Instrument Transformer a 11 kv P.T 3 Phase Each Lightening Arrestors a 33 kv 10 ka Each b 11 kv line type (NF=4) Each c 11 kv Station Type 10 ka Each Isolating Switches a 33 kv 800 A AB Switch Each b 11 kv 800 A AB switch (NTx1+1) Each c 11 kv 400 A AB switch (NFx2+2) Each Volts 40 AH Battery Set including Battery charger Each MVAR 11 kv Capacitor Bank along with associated Each capacitors 15 Earthing of power transformer, VCBs, AB switches, LS structures with 75x8 mm GI Flat Total Contingencies (3%) on items 6 to Total material cost *Labour, transport, Estt & supervision and other charges(18% ) Total cost * As recommended in the report. 156

167 Annexure-5.5 (b) 157

168 Annexure 5.6(a) Standard cost estimate for domestic, non domestic, single phase service connection S.N Description Rate Unit Quantity Amount 1. Single phase high precision meter 800 Each A, 5-20A 2. 15A, MCB/Fuse unit 200 Each Moulded distribution box 500 Each PVC cable single core 3.43 Meter Sq MM 5. GI wire No Kg PVC pipe 20MM 10 Meter PVC bends 20 MM 5 Each Misc. (Lumpsum) TOTAL % contingencies on materials Total cost of materials *Labour, transport, Estt & supervision and other charges (25%) Total cost * As recommended in the report. 158

169 Annexure 5.6(b) Standard cost estimate for three phase domestic, non-domestic service connection S.N Description Rate Unit Quantity Amount 1. Three phase AC high precision 1800 Each meter 10-14amps 2. Three phase 955 Each AMCB/Fuse unit 3. Moulded distribution box 500 Each PVC cable 5.10 Each Sq MM 5. GI wire No Kg PVC pipe 20MM 10 Meter PVC bends 20 MM 5 Each Misc. Items Total Contingencies 3% Total *Labour, transport, Estt & supervision and other charges(25%) Total cost * As recommended in the report. 159

170 Standard cost estimate for three phase industrial service upto 20HP Annexure 5.6 (c) S.N Description Rate (Rs.) Unit Quantity Amount (Rs.) 1. Three phase high precision 1800 Each electronic meter 10-40amps 2. Three phase 955 Each AMCB/Fuse unit 3. Moulded distribution box 500 Each PVC cable 8.10 Meter Sq MM 5. GI wire No Kg PVC pipe 38MM 15 Meter PVC bends 38 MM 10 Each Misc. Items LS Total Contingencies 3% Total *Labour, transport, Estt & supervision and other charges (25%) Total cost * As recommended in the report. 160

171 Annexure 5.6 (d) Standard cost estimate for three phase industrial service above 20HP S.N Description Rate Unit Quantity Amount 1. LT Three phase class Each accuracy CT operated energy meters 2. Moulded distribution box 1000 Each PVC cable 9.00 Meter Sq MM 4. GI wire No Kg PVC pipe 38MM 15 Meter PVC bends 38 MM 10 Each Misc. Items LS Sub total Contingencies 3% Total *Labour, transport, Estt & supervision and other charges (25%) Grand total * As recommended in the report. 161

172 Annexure 5.6 (e) Standard cost estimate for street light service connection S.N Description Rate Unit Quantity Amount 1. LT single phase electronic meter 800 Each A 60A 2. Single phase 15A, MCB / fuse 200 Each unit 3. Light sensitive switch 310 Each PVC cable 4 Sq MM single core 4.00 Meter PVC pipe 25 MM 20 Meter PVC bends 25MM 15 Each Moulded distribution box 500 Each Misc. LS LS Total Contingencies 3% Total cost of materials *Labour, transport, Estt & supervision and other charges (25%) 11. Grand total * As recommended in the report. 162

173 S.N Description Standard cost estimate for agricultural service connection Rate (Rs.) Unit Annexure 5.6 (f) Quantity Amount 1. GI pipe 40 MM 200 Meter PVCS cable 6 mm Meter PVC cable 2.65MM 3.43 Meter Arial fuse 32A 39 Each B type box 700 Each Meter board 250 Each SPIC cutout with fuse unit Each Amps 8. 3 phase AC high precision meter 1800 Each to 40 Amps 9. Coil earthing, bolts, nuts, binding LS wire etc 10. Cost of materials Contingencies 3% Total cost of materials *Labour, transport, Estt & supervision and other charges (25%) Total cost * As recommended in the report. 163

174 Standard arrangement for single phase service connection Anneuxre-5.6 (g) 164

175 Standard arrangement for three phase industrial service connection with bare wires. Annexure-5.6 (h) 165

176 Standard arrangement for three phase industrial service connection with insulated wires. Annexure-5.6 (i) 166