Engineering Recommendation P26
|
|
- Leon Walton
- 6 years ago
- Views:
Transcription
1 Engineering Recommendation P26 The Estimation of the Maximum Prospective Short-Circuit Current for Three Phase 415V Supplies Document originally produced by the Electricity Association.
2 2003 Energy Networks Association All rights reserved. No part of this publication may be reproduced, stored in a retrieval or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Energy Networks Association. Specific enquiries concerning this document should be addressed to: Engineering Directorate Energy Networks Association 18 Stanhope Place Marble Arch London W2 2HH This document has been prepared for use by members of the Energy Networks Association to take account of the conditions which apply to them. Advice should be taken from an appropriately qualified engineer on the suitability of this document for any other purpose.
3 Page i CONTENTS PAGE 1 INTRODUCTION SERVICE LINE ARRANGEMENTS THE PROSPECTIVE SHORT-CIRCUIT LEVEL ON THE BOARD'S MAIN DISTRIBUTOR ESTIMATION OF THE PROSPECTIVE SHORT-CIRCUIT CURRENT AT THE BOARD'S CUT-OUT ATTENUATION IN PSCC BEYOND THE BOARD'S CUT-OUT THREE-PHASE SUPPLIES TO SMALLER INSTALLATIONS CONSISTING ONLY OF SINGLE-PHASE EQUIPMENT...5
4 Page ii Intentionally blank
5 Page 3 THE ESTIMATION OF THE MAXIMUM PROSPECTIVE SHORT-CIRCUIT CURRENT FOR THREE-PHASE 415 V SUPPLIES 1 INTRODUCTION This Engineering Recommendation gives guidance on the estimation of the maximum prospective short-circuit current (PSCC) at the supply terminals of those installations which are connected to the Electricity Board's low voltage distribution network via a 415 V three-phase service line. This information will be of interest to installation designers as one of the characteristics of an external supply which it is necessary to ascertain under Section 313 of the IEE Wiring Regulations (15th edition). The procedure given in this Engineering Recommendation will provide a maximum value of PSCC for design purposes which is appropriate for the great majority of three-phase installations. Where the service arrangement consists of more than one separately protected three-phase line, direct from 1.v. bus-bars in the Board's distribution substation, individual guidance will be given on application to the Board. Because of the particular conditions which apply in the London Electricity Board and Merseyside and North Wales Electricity Board, the guidance in this document is not appropriate for installations in areas served by these Boards. Suitable guidance may be obtained direct from these Electricity Boards. The advice contained in this Engineering Recommendation is given in good faith based on information currently available; but no responsibility can be accepted for any inaccuracies or omissions in the advice which arise out of changes in such information. 2 SERVICE LINE ARRANGEMENTS The majority of three-phase 1.v. installations receive supply from an underground or overhead main distributor by means of a service line connected to the Board's main distributor. In a limited number of cases, for service lines of higher cross-sectional area, connection may be direct to the 1.v bus-bar of an adjacent distribution substation. 3 THE PROSPECTIVE SHORT-CIRCUIT LEVEL ON THE BOARD'S MAIN DISTRIBUTOR Electricity Boards are required to meet the demands of all their customers by providing an efficient and adequate supply system. On 1.v distribution systems this means the provision of adequate capacity at all times throughout the system and reinforcing the system to meet any increase of load. The PSCC available at any point of the system is directly related to the overall system capacity and the distance from the supply source. Increase in demand may in the course of time require additional capacity to be installed by, for example, building a new distribution substation or increasing the capacity of an existing substation. It follows therefore that during the life of any consumer's installation the PSCC may increase. To avoid the need for repeated changes in the protective equipment and the
6 Page 4 consequent costs, Electricity Boards normally design their distribution systems to a maximum PSCC and select the equipment for their system accordingly. This equipment includes the Boards' cut-out and fuse-link. It is strongly recommended that the designer of an installation should adopt the same approach in selecting equipment particularly where it will be required to operate close to the supply terminals. The guidance given in this document is based on the range of sizes of transformers (up to 1000 kva) and mains conductors (up to 300 mm 2 Aluminium) used generally in 1.v. distribution networks. It is considered that an appropriate maximum design value of PSCC for three-phase 415 V supplies in situations where the service line is connected direct to the 1.v. bus-bar of the Board's distribution substation is 25 ka (rms) at the point of connection. In cases where the service line is connected to the Board's main distributor, a maximum design value for the PSCC of 18 ka (rms) at the point of connection of the service line should be used. Note: In cases of very high load density (e.g major city centres) more onerous conditions may apply. 4 ESTIMATION OF THE PROSPECTIVE SHORT-CIRCUIT CURRENT AT THE BOARD'S CUT-OUT The PSCC at the point of connection of the service line as given in Section 3 will be attenuated by the service line and it is possible to allow for this attenuation in estimating the maximum PSCC at the origin of the consumer's installation. Table 1 shows the maximum PSCC and power factor at the service entry position for service lines connected direct to the 1.v. bus-bar in the Board's distribution substation. Table 2 shows the maximum PSCC and power factor at the cut-out for service lines connected to a distribution main. Both tables provide the information for lengths of service line up to 50 m. The power factor is calculated for three-phase fault conditions and may be of interest in selecting protective equipment, it does not relate to the power factor of the installation under normal load conditions. To use the tables it is necessary to ascertain the length and cross-sectional area of the service line phase conductors. For Table 1, information on the length of the service line will normally be available. For Table 2, the service line length may be measured or estimated from site plans as the shortest distance from the public right of way nearest the installation to the cut-out. This procedure is recommended since, even if the precise position of the Board's main distributor or of the service line is known at the design stage, it may be necessary to move them in the future. Tables 1 and 2 are based on standard aluminium cables in metric sizes. Table 3 gives approximate equivalent sizes of copper conductor in metric and imperial units and of aluminium conductor in imperial units.
7 5 ATTENUATION IN PSCC BEYOND THE BOARD'S CUT-OUT Engineering Recommendation P26 Page 5 Where the consumer's switchgear is positioned more than one metre electrically from the Board's cut-out, the designer may wish to allow for additional attenuation in the PSCC due to the length of distributor between the cut-out and the consumer's switchgear. The designer may find it convenient to add the service line length estimated as in Section 4 above to the length of distributor within the installation and read the PSCC from Tables 1 or 2. Alternatively, the PSCC estimated in Section 4 may be used as a basis for calculating the additional attenuation. 6 THREE-PHASE SUPPLIES TO SMALLER INSTALLATIONS CONSISTING ONLY OF SINGLE-PHASE EQUIPMENT Installations supplied by a 415 V three-phase service line which consist only of separated single-phase equipment, so that there is no possibility of a phase to phase fault within the installation, could be regarded so far as the selection of protective equipment is concerned, as single-phase 240 V installations. In such cases for service line sizes up to 35 sq mm the guidance given in Engineering Recommendation P25 may be used to estimate the single-phase to neutral PSCC at the origin. TABLE 1 ESTIMATED MAXIMUM PSCC AT THE BOARD S CUT-OUT BASED ON DECLARED LEVEL OF 25kA (0.23 pf) AT THE POINT OF CONNECTION OF THE SERVICE LINE TO THE BUS-BAR IN THE BOARD S DISTRIBUTION SUBSTATION. Length Service Line Cross-sectional Area Service Line 95 mm 2 Al 120 mm 2 Al 185 mm 2 Al 240 mm 2 Al 300 mm 2 Al (metres) PSCC pf PSCC pf PSCC pf PSCC pf PSCC pf
8 Page 6 TABLE 2 ESTIMATED MAXIMUM PSCC AT THE BOARD S CUT-OUT BASED ON DECLARED LEVEL OF 18kA (0.5 pf) AT THE POINT OF CONNECTION OF THE SERVICE LINE TO THE L.V. DISTRIBUTION MAIN. Length Service Line Cross-sectional Area of Service UP to 35 mm 2 70 mm 2 95 mm mm mm mm mm 2 Line AI AI AI AI AI AI AI (metres) PSCC pf PSCC pf PSCC pf PSCC pf PSCC pf PSCC pf PSCC pf TABLE 3 APPROXIMATE EQUIVALENT CABLE SIZES FOR USE WITH TABLES 1 AND 2. Aluminium Copper Copper Aluminium Metric Metric Imperial Imperial Size Size Size Size (mm 2 ) (mm 2 ) (in 2 ) (in 2 )
CLP POWER HONG KONG LIMITED. SUPPLY RULES March 2001
CLP POWER HONG KONG LIMITED SUPPLY March 2001 ADVISORY SERVICE Advice concerning matters relating to the supply of electricity may be obtained free of charge from the Company. OTHER COMPANY PUBLICATIONS
More informationELECTRICAL INSPECTOR EXAMINATION 14 November 2015 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours
Candidate Code No. IT 32 For Board Use Only Result Date Int Result Date Int ELECTRICAL INSPECTOR EXAMINATION 14 November 2015 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours INSTRUCTIONS READ CAREFULLY
More informationTitle High Voltage and 1500 System Earthing References and Definitions. Reference Number PDS 02 (RIC Standard: EP SP)
Discipline Engineering Standard NSW Category Electrical Title High Voltage and 1500 System Earthing References and Definitions Reference Number PDS 02 (RIC Standard: EP 12 00 00 01 SP) Document Control
More informationTitle Low Voltage Distribution and Installations Earthing References and Definitions. Reference Number PDS 03 (ARTC Standard: EP SP)
Discipline Engineering Standard NSW Category Electrical Title Low Voltage Distribution and Installations Earthing References and Definitions Reference Number PDS 03 (ARTC Standard: EP 12 00 00 02 SP) Document
More informationTRANSMISSION SYSTEMS
TRANSMISSION SYSTEMS Transmitting large amounts of electric energy over long distances is accomplished most efficiently by using high-voltages. Without transformers the widespread distribution of electric
More informationContents. 1 Introduction. 2. Advisory and Information Systems. 3. Supply. 3.1 Quality of Electric Supply. 3.2 Interference with other Customers
DISTRIBUTION CODE Contents 1 Introduction 2. Advisory and Information Systems 3. Supply 3.1 Quality of Electric Supply 3.2 Interference with other Customers 3.3 Application for the Supply of Electricity
More informationEDS FUSE RATINGS AT DISTRIBUTION SUBSTATIONS
Document Number: EDS 05-4001 Network(s): Summary: ENGINEERING DESIGN STANDARD EDS 05-4001 FUSE RATINGS AT DISTRIBUTION SUBSTATIONS EPN, LPN, SPN This design standard details the HV and LV fuse ratings
More informationSSC-JE STAFF SELECTION COMMISSION ELECTRICAL ENGINEERING STUDY MATERIAL. Estimation and Costing & Utilization of Electrical Energy
1 SSC-JE STAFF SELECTION COMMISSION ELECTRICAL ENGINEERING STUDY MATERIAL Estimation and Costing & Utilization of Electrical Energy Estimation and Costing & Utilization of electrical Energy Estimation
More informationA member-consumer with a QF facility shall not participate in the Cooperative s electric heat rate program.
Electric Tariff _2nd Revised Sheet No. 72 Filed with Iowa Utilities Board Cancels _1st Sheet No. _72 Cooperative is a member of Central Iowa Power Cooperative (CIPCO), a generation and transmission cooperative
More informationOn_Disc. 2 o/c1 BS 7671 applies to a lift installations b highway equipment c equipment on board ships d electrical equipment of machines.
1 PAPER 4 Sample Questions - C&G 2382 17th Edition full paper D 1 o/c 1 - A recommendation for the interval to the first periodic inspection shall be made by: a the installation electrician. b the main
More informationReviewed: DD Month University Code of Practice for Electrical Safety. PART B - Design and Construction of Electrical Equipment within the University
Safety Office Reviewed: 17 July 2012 Reviewed: DD Month University Code of Practice for Electrical Safety PART B - Design and Construction of Electrical Equipment within the University The purpose of this
More informationEARTHING YOUR QUESTIONS ANSWERED
18 EARTHING YOUR QUESTIONS ANSWERED By Geoff Cronshaw What are earthed and unearthed systems? What are the requirements of BS 7671? What are the advantages and disadvantages of the various types of earthing
More informationMODEL 540 USER MANUAL INCORPORATING MODEL 530 TEMPERATURE CONTROLLER
MODEL 540 USER MANUAL INCORPORATING MODEL 530 TEMPERATURE CONTROLLER Signal Group Limited 12 Doman Road, Camberley Surrey, GU15 3DF England Tel: +44 (0) 1276 682841 Fax: +44 (0) 1276 691302 e-mail: instruments@signal-group.com
More informationUnderground Distribution Construction Manual
Underground Distribution Construction Manual Section E7 Earthing Approved by: A Smith de Perez Energex Limited 2014 ABN 40 078 849 055 MANUAL 00305 1. INSTALLATION Detailed earthing information may be
More informationELECTRICAL INSPECTOR EXAMINATION 18 November 2017 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours
Candidate Code No. IT 36 For Board Use Only Result Date Int Result Date Int ELECTRICAL INSPECTOR EXAMINATION 18 November 2017 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours INSTRUCTIONS READ CAREFULLY
More informationLow Voltage Power Supplies in Electrified Areas
Low Voltage Power Supplies in Electrified Areas Synopsis This document mandates requirements for control of return and stray currents and the management of earthing for low voltage power supplies in electrified
More information33kV Connection up to 90MVA
Electricity Specification 217 Issue 2 December 2007 33kV Connection up to 90MVA Contents 1 Scope 2 General 3 Connection Arrangements 4 Equipment Records 5 Documentation 6 Documents Referenced 7 Keywords
More information9/16/2010. Chapter , The McGraw-Hill Companies, Inc. TRANSMISSION SYSTEMS. 2010, The McGraw-Hill Companies, Inc.
Chapter 3 TRANSMISSION SYSTEMS 1 Transmitting large amounts of electric energy over long distances is accomplished most efficiently by using high-voltages. Without transformers the widespread distribution
More informationSWITCHGEAR FOR SERVICE UP TO 36kV (CABLE AND OVERHEAD CONDUCTOR CONNECTED)
PRODUCED BY THE OPERATIONS DIRECTORATE OF ENERGY NETWORKS ASSOCIATION Issue 3 2012 SWITCHGEAR FOR SERVICE UP TO 36kV (CABLE AND OVERHEAD CONDUCTOR CONNECTED) www.energynetworks.org 2012 Energy Networks
More informationA guide for the connection of a low voltage installation to The Guernsey Electricity Network
A guide for the connection of a low voltage installation to The Guernsey Electricity Network Guernsey Electricity Limited (GEL) - January 2017 2 Contents Definitions 3 Introduction 5 Scope 6 Sections 1
More informationWilkins Safety Group
H & S Guidance - Electricity INTRODUCTION Each year there are almost 1000 reportable accidents at work due to contact with electricity including a significant number of fatalities (about 20 a year). Even
More informationGuidance for Low Voltage Electrical Installations
Guidance for Low Voltage Electrical Synopsis This document provides information in support of GI/RT7007 Low Voltage Electrical. Signatures removed from electronic version Submitted by Anne E Blakeney Standards
More informationTechnical Specification 12-24
PRODUCED BY THE ENGINEERING DIRECTORATE OF THE ENERGY NETWORKS ASSOCIATION Technical Specification 12-24 Issue 2 Technical Specification for Plastic Ducts for Buried Electric Cables energynetworks.org
More informationFUNDAMENTALS OF POWER DISTRIBUTION SAIEE-1337-V : 2 CPD credits : Category 1
THE SOUTH AFRICAN INSTITUTE OF ELECTRICAL ENGINEERS FUNDAMENTALS OF POWER DISTRIBUTION SAIEE-1337-V : 2 CPD credits : Category 1 OVERVIEW : 1. Introduction to Distribution, Transmission and Generation
More informationSYSTEM PROTECTION SYSTEM PROTECTION. Underground Electric Distribution Standards I. FUSE COORDINATION
I. FUSE COORDINATION I.1. GENERAL I.1.1. The purpose of protective coordination is to provide isolation of a fault as close to the fault as possible so that a minimum of customers will be affected. The
More informationEDS ELECTRIC VEHICLE CONNECTIONS
Document Number: EDS 08-5050 Network(s): Summary: ENGINEERING DESIGN STANDARD EDS 08-5050 ELECTRIC VEHICLE CONNECTIONS EPN, LPN, SPN This standard outlines the design requirements for the connection of
More informationItem Code Description Unit Qty Total
UNDP ELECTRICITY SECTOR NORTHERN GOVERNORATES Phase XI Item Code Description Unit Qty Total 04-02-00001 Service Pole - 6m, 75mm dia GS Pipe 11250 04-02-00002 9m Tubular Steel Poles complete with all Accessories
More informationTechnical Specification 43-8 Issue Amendment
PRODUCED BY THE OPERATIONS DIRECTORATE OF ENERGY NETWORKS ASSOCIATION Technical Specification 43-8 Issue 4 2015 + Amendment 1 2016 Overhead line clearances www.energynetworks.org PUBLISHING AND COPYRIGHT
More informationNational Grid UK Electricity Transmission plc. NATIONAL SAFETY INSTRUCTION and Guidance
National Grid UK Electricity Transmission plc NATIONAL SAFETY INSTRUCTION and HIGH VOLTAGE METAL CLAD SWITCHGEAR WITH SPOUTS Copyright National Grid plc 2014, all rights reserved. No part of this publication
More informationELECTRICAL SERVICES REPORT PROPOSED AVIEMORE RESIDENTIAL APARTMENT DEVELOPMENT, SEDGEFIELD. Mr. L. Gregory
ELECTRICAL SERVICES REPORT FOR PROPOSED AVIEMORE RESIDENTIAL APARTMENT DEVELOPMENT, SEDGEFIELD FOR Mr. L. Gregory REPORT NO: G/11204/E/R1 Dated: 1 March 2013 2 INDEX Item Description Page 1.0 Introduction
More informationRequirements for Secondary Voltage Revenue Metering (750 V and less)
Requirements for Secondary Voltage Revenue Metering (750 V and less) To view the latest revision of this document go to: http://www.bchydro.com/ext/metering/ January 28, 2010 Copyright 2008 by BC Hydro.
More information045 : 2000 CEB STANDARD
045 : 2000 CEB STANDARD LOW VOLTAGE FUSE SWITCH DISCONNECTOR CEYLON ELECTRICITY BOARD SRI LANKA Specification for LOW VOLTAGE FUSE SWITCH DISCONNECTOR CEB Standard 045 : 2000 CEYLON ELECTRICITY BOARD No.
More informationFinal Written Examination.
Benha University Semester (3 th year Power &Control) Faculty of Engineering Electrical Power Systems (E1331) Electrical Engineering Department Semester 2015-2016 Final Written Examination. 10/1/2016 Time
More informationElectrical Awareness for Construction Activities. Overhead Power Lines & Underground Cables
Electrical Awareness for Construction Activities Overhead Power Lines & Underground Cables Electrical Awareness for Construction Activities Electrical appreciation Agenda Overview of the electrical distribution
More informationECS CONNECTION OF LARGE LV SERVICES TO SECONDARY DISTRIBUTION SUBSTATIONS
Network(s): Summary: ENGINEERING CONSTRUCTION STANDARD ECS 03-0054 CONNECTION OF LARGE LV SERVICES TO SECONDARY DISTRIBUTION SUBSTATIONS EPN, LPN, SPN This standard details the procedures to be undertaken
More informationCustomer Requirements Downtown Secondary Network Service
Application This standard describes the limitations and requirements for receiving service from the Tacoma Power secondary network system within the City of Tacoma downtown core area. In This Standard
More informationELECTRICIAN S THEORY EXAMINATION 19 June 2010 QUESTION AND ANSWER BOOKLET
Candidate Code No. ET34 For Board Use Only Result Date Int Result Date Int ELECTRICIAN S THEORY EXAMINATION 19 June 2010 QUESTION AND ANSWER BOOKLET INSTRUCTIONS READ CAREFULLY Time Allowed: Three hours
More informationKAUAI ISLAND UTILITY COOPERATIVE KIUC Tariff No. 1 Lihue, Kauai, Hawaii Original Sheet 5 RULE NO. 2 CHARACTER OF SERVICE
Lihue, Kauai, Hawaii Original Sheet 5 RULE NO. 2 A. GENERAL 1. The character of service available at any particular location must be ascertained by the Company business office, and will depend upon the
More informationRenewable sources of electricity a brief overview
Micro generation 11 Renewable sources of electricity a brief overview THE SCOPE of the 17th Edition is wider and contains many new requirements, including additional requirements to ensure the safe connection
More informationWIRING MATTERS SEPTEMBER 2018
WIRING MATTERS SEPTEMBER 2018 The 18 th Edition (BS 7671:2018) launch - revisited This is the second of two articles on the launch of the 18 th Edition (BS 7671:2018). The first article covered electric
More informationSTANDARD TECHNIQUE : SD5P/2
Company Directive STANDARD TECHNIQUE : SD5P/2 Design of Un-metered Connections ST:SD5P/2 7 th December 2009-1 of 10 - 1.0 INTRODUCTION This document specifies the requirements for the design of un-metered
More informationTABLE OF CONTENTS FOREWORD...3 INTRODUCTION SCOPE NORMATIVE REFERENCES DEFINITIONS AND ABBREVIATIONS REQUIREMENTS...
TITLE SPECIFICATION FOR PORTABLE DATE: JULY 2006 PAGE: 1 OF 25 TABLE OF CONTENTS Page FOREWORD...3 INTRODUCTION...4 1 SCOPE...4 2 NORMATIVE S...4 3 DEFINITIONS AND ABBIATIONS...4 4 REQUIREMENTS...5 4.1
More informationCalculation of the Cross-sectional Areas of Circuit Live Conductors
Calculation of the Cross-sectional Areas of Circuit Live Conductors MOTOR CIRCUITS SUBJECT TO FREQUENT STOPPING AND STARTING Regulations requires that where a motor is intended for intermittent duty and
More informationFUSES. Safety through quality
Safety through quality HH HIGH VOLTAGE Over many decades SIBA has developed a global product line of High Voltage Fuses that are comprehensive for any and all applications. Superior engineering, advanced
More informationFuse-links type CEF-S Rated voltages: 6/12 kv 30/40.5 kv Rated currents: 6.3 A 63 A
DISTRIBUTION SOLUTIONS Fuse-links type CEF-S Rated voltages: 6/12 kv 30/40.5 kv Rated currents: 6.3 A 63 A Superior performance versus standard fuses ensuring up to 40% faster protection in case of low
More informationHHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD. The temperature limiting function of the fuse striker pin. Design and construction.
HHD HIGH VOLTAGE GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS The striker pin system is connected by means of a high resistance parallel conductor. After melting the main
More informationFROM B.C. HYDRO ENCLOSURE (SEE NOTE 4) RIGID CONDUITS (SEE NOTE 8) ALTERNATIVE TO LOAD BARRIER (SEE NOTE 7) SERVICE ENTRANCE ENCLOSURE
FROM B.C. HYDRO FOR OVERHEAD INSTALLATION ONLY DUCT SEAL (SEE NOTE 8) PULL BOX (SEE NOTE 5) PULL BOX (SEE NOTE 5) FROM B.C. HYDRO 7- REVISED NOTES & TABLES ON PAGES,3,4,5,.MARCH AJ - GENERAL REV.MA 08
More informationINSTRUCTION MANUAL FOR THE THERMOCOUPLE ATTACHMENT UNIT (TAU)
INSTRUCTION MANUAL FOR THE THERMOCOUPLE ATTACHMENT UNIT (TAU) Model Number: 41756 (100 125Vac) 41757 (220 240Vac) Manufactured in the United Kingdom CONTENTS Chapter Page Specification 3 What the TAU does
More informationNational Grid UK Electricity Transmission plc. NATIONAL SAFETY INSTRUCTION and Guidance
National Grid UK Electricity Transmission plc NATIONAL SAFETY INSTRUCTION and Guidance WASHING HIGH VOLTAGE INSULATORS USING PORTABLE WASHING EQUIPMENT Copyright National Grid plc 2014, all rights reserved.
More information31-SDMS-02 REV. 01 SPECIFICATIONS FOR
31-SDMS-02 REV. 01 SPECIFICATIONS FOR LOW VOLTAGE DISTRIBUTION PILLAR This specification is property of SEC and subject to change or modification without any notice C O N T E N T S S. NO. D E S C R I P
More informationELECTRICIANS REGULATIONS EXAMINATION 29 June 2013 QUESTION AND ANSWER BOOKLET
ER52 Candidate Code No. For Board Use Only Result Date Result Date Int ELECTRICIANS REGULATIONS EXAMINATION 29 June 2013 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours INSTRUCTIONS READ CAREFULLY
More informationItem L.1 Voltages 1. The consumer voltage must be between +10% and -10% of the nominal national voltage (nnv.)
Village Hydro Specifications Line Distribution Description of Requirement Item L.1 Voltages 1. The consumer voltage must be between +10% and -10% of the nominal national voltage (nnv.) Recommendation 2.
More informationApproved Meter Sockets and Cabinets
Single Unit Residential Guide 1 PHASE, 120/240 VOLT SERVICES SERVICE CAPACITY OWNED METERING (Metering sockets and cabinets are supplied by Customer). Outdoor meter mounting height is 1730 mm ( 5 8 ) to
More informationTRI-SERVICE ELECTRICAL WORKING GROUP (TSEWG) 03/05/09 TSEWG TP-11: UFC N BEST PRACTICES
TSEWG TP-11: UFC 3-500-10N BEST PRACTICES UFC 3-500-10N was developed by NAVFAC and was used as the starting point for the tri-services development of UFC 3-500-10, Design: Electrical Engineering. UFC
More informationSUBSTATION INTERLOCKING SCHEMES
SUBSTATION INTERLOCKING SCHEMES This document is for internal and contract specific use only. Disclaimer NGG and NGET or their agents, servants or contractors do not accept any liability for any losses
More informationDesign Guide for Integration of Fixed-Mount Circuit Breakers
Design Guide Design Guide for Integration of Fixed-Mount Circuit Breakers WL Low Voltage Power Circuit Breakers www.usa.siemens.com/wlbreaker Contents Introduction... 3 Mounting... 3 Mounting Surface...
More informationSOUTH AFRICAN NATIONAL STANDARD. Plug and socket-outlet systems for household and similar purposes for use in South Africa
ISBN 978-0-626-27016-2 SANS 164-1:2012 SOUTH AFRICAN NATIONAL STANDARD Plug and socket-outlet systems for household and similar purposes for use in South Africa Part 1: Conventional system, 16 A 250 V
More informationAPRIL 2011 FINAL RATES
STATEMENT OF CHARGES FOR USE OF INDEPENDENT POWER NETWORKS LIMITED S ELECTRICITY DISTRIBUTION NETWORK APRIL 2011 FINAL RATES This statement is effective from 1st April 2011 Independent Power Networks Limited,
More informationElectricity Safety (Electrical Installations) Regulation 2005
New South Wales Electricity Safety (Electrical Installations) Regulation 2005 under the Electricity Safety Act 1945 Her Excellency the Governor, with the advice of the Executive Council, has made the following
More informationSECTION LOW VOLTAGE DISTRIBUTION EQUIPMENT
SECTION 16400 LOW VOLTAGE DISTRIBUTION EQUIPMENT A. General 1. The University does not accept Series-Rated equipment for power distribution switchboards, distribution panels and branch circuit panelboards.
More informationTECHNICAL SPECIFICATION
TECHNICAL SPECIFICATION IEC TS 62257-9-2 First edition 2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-2: Microgrids IEC 2006 Copyright - all rights
More informationSECTION 3 CUSTOMER CLASS SPECIFIC
SECTION 3 CUSTOMER CLASS SPECIFIC 3.0 General PowerStream shall recover costs associated with the installation of Connection Assets, by customer class, via a Basic Connection Charge and a Variable Connection
More information31-SDMS-01 REV. 03 SPECIFICATIONS FOR
31-SDMS-01 REV. 03 SPECIFICATIONS FOR LOW VOLTAGE DISTRIBUTION PANEL This specification is property of SEC and subject to change or modification without any notice CONTENTS Clauses: Page No. 1.0 SCOPE
More informationTEMPORARY ELECTRICAL SERVICE
ENERGY SERVICES ENGINEERING 840 Northgate Drive Telephone (509) 942-7403 Fax (509) 942-7405 P.O. Box 190 Richland, WA 99352 www.ci.richland.wa.us/energyservices TEMPORARY ELECTRICAL SERVICE A. INTRODUCTION
More informationBharat Heavy Electricals Limited (High Pressure Boiler Plant) Tiruchirappalli , TAMIL NADU, INDIA CAPITAL EQUIPMENT / MATERIALS MANAGEMENT
An ISO 9001 Company Bharat Heavy Electricals Limited (High Pressure Boiler Plant) Tiruchirappalli 620014, TAMIL NADU, INDIA CAPITAL EQUIPMENT / MATERIALS MANAGEMENT ENQUIRY NOTICE INVITING TENDER Phone:
More informationFusing Equipment. Sidewall-Mounted and Cover-Mounted Bay-O-Net Fuse Assembly GENERAL INSTALLATION
Fusing Equipment Sidewall-Mounted and Cover-Mounted Bay-O-Net Fuse Assembly Electrical Apparatus 240-40 GENERAL Cooper Power Systems Bay-O-Net Fuse Assemblies are used to protect transformers and distribution
More informationLG HRC Power Fuses ISO 9001 ISO 14001
LG HRC Power Fuses ISO 900 ISO Current without Power Fuse (ka ms) Ipeak Let through Below 0.5 Cycle voltage(kv) Initiation of 3. 7. 5.5 3 arcing(degree) Ipeak(kA) Power Factor 5 5 90 5 70 9 0 7 7 7 5 5
More informationCompany Directive STANDARD TECHNIQUE: SD4O/1. Standard HV Connection Arrangements
Company Directive STANDARD TECHNIQUE: SD4O/1 Standard HV Connection Arrangements Policy Summary This document specifies the standard arrangements for HV metered connections. NOTE: The current version of
More informationSOUTHWEST LOUISIANA ELECTRIC MEMBERSHIP COORPORATION COMMERCIAL SERVICE REQUIREMENTS
SOUTHWEST LOUISIANA ELECTRIC MEMBERSHIP COORPORATION COMMERCIAL SERVICE REQUIREMENTS November 17, 2016 Engineering Service Specifications Table of Contents Commercial Service Requirements SLEMCO Commercial
More informationAFTER GAZETTING (WORKING DOCUMENT FOR A 3 YEAR PERIOD) DATE PAGE PARAGRAPH DESCRIPTION ORIGINATOR APPROVED
PART B-07 TITLE: SERVICE CONNECTIONS SPECIFICTION NO: B-07 INCEPTION DATE: AFTER GAZETTING (WORKING DOCUMENT FOR A 3 YEAR PERIOD) AMENDMENTS / REVISIONS DATE PAGE PARAGRAPH DESCRIPTION ORIGINATOR APPROVED
More informationACSR- ROPES Aluminium wire steel reinforced (ACSR conductor)
ACSR- ROPES Aluminium wire steel reinforced (ACSR conductor) The steel reinforced aluminium conductor consists of seven or more aluminium wires applied in concentric layers over a steel core made of one
More informationGT/TDINT100 Issue: 1 Date: SEP 1993 Page 1 of 11
British Railways Board Group Standard Page 1 of 11 Part A Synopsis This Directive gives the general requirements of telecommunications earthing systems, and encompasses the requirements for the earthing
More informationPLANNING, ELIGIBILITY FOR CONNECTION AND CONNECTION PROCEDURE IN EMBEDDED GENERATION
PLANNING, ELIGIBILITY FOR CONNECTION AND CONNECTION PROCEDURE IN EMBEDDED GENERATION Presentation by Engr. O. C. Akamnnonu Chief Executive Officer, Ikeja Electricity Distribution Company AGENDA WORK THROUGH
More informationPRESENTER PETER NJENGA CHIEF ENGINEER, CUSTOMER SERVICE, KENYA POWER EAST AFRICAN POWER INDUSTRY CONVENTION 2012
PRESENTER PETER NJENGA CHIEF ENGINEER, CUSTOMER SERVICE, KENYA POWER EAST AFRICAN POWER INDUSTRY CONVENTION 2012 Introduction Power reliability Power Quality Harmonics Distortion Poor power factor Circuit
More informationAdvance design OEM L-Frames, cell kits, & enclosures Metal-clad switchgear components OEM catalog & pricing
Advance design OEM L-Frames, cell kits, & enclosures Metal-clad switchgear components OEM catalog & pricing Introduction A modular system of switchgear building blocks and cassettes provide untouchable
More informationService Installation
Service Installation S T U D E N T M A N U A L March 31, 2005 2 STUDENT TRAINING MANUAL Prerequisites: None Objectives: Given the Construction Standards Manual, you will be able to explain and/or demonstrate
More informationNH fuse-links am 690VAC top indicator/live tags size 4, 4a
NH fuse-links am 69VAC LOW VOLTAGE IEC FUSES IEC NH FUSE-LINKS FEATURES & BENEFITS Dimensions according to DIN 43 62 parts 1 to 4 Non-isolated gripping lugs Double indicator Lead free contact blades %
More informationHHB. Medium Voltage Fuses British Standard. Introduction. Fuse-links for oil insulated switchgear
HHB Medium Voltage Fuses British Standard For Oil Insulated Switchgears Introduction Medium voltage fuse-links according to British Standard are back-up fuse-links for the protection of substations up
More informationPower IT Air Insulated Cubicle Uniswitch
- 1-4/2/2003 Secondary Distribution Switchgear Power IT Air Insulated Cubicle Uniswitch Table of Contents Market segment Ratings New for 2003 Technical features Advantages Market segment Uniswitch Switchgear
More informationSTATEMENT OF CHARGING METHODOLOGY FOR USE OF THE SOUTHERN ELECTRIC POWER DISTRIBUTION PLC EMBEDDED DISTRIBUTION NETWORKS
STATEMENT OF CHARGING METHODOLOGY FOR USE OF THE SOUTHERN ELECTRIC POWER DISTRIBUTION PLC EMBEDDED DISTRIBUTION NETWORKS Effective from 1 st April 2013 The methodology set out in this statement was approved
More informationELECTRICIAN S REGULATIONS EXAMINATION 26 June 2010
Candidate Code No. Result Date Int For Board Use Only ER38 Version of AS/NZS 3000 used (tick ONE Box) 2000 2007 & Amend 1 ELECTRICIAN S REGULATIONS EXAMINATION 26 June 2010 QUESTION AND ANSWER BOOKLET
More informationCOMMERCIAL QUICK REFERENCE
COMMERCIAL QUICK REFERENCE PROVO CITY POWER STANDARDS ELECTRICAL ENGINEERING UPDATED: 2016 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTIFICATION. 18" MIN. OF TAIL. (NEUTRAL CONDUCTOR MUST BE WHITE OR
More informationELECTRICIANS REGULATIONS EXAMINATION 30 June 2012 QUESTION AND ANSWER BOOKLET
ER47 Candidate Code No. For Board Use Only Result Date Result Date Int ELECTRICIANS REGULATIONS EXAMINATION 30 June 2012 QUESTION AND ANSWER BOOKLET INSTRUCTIONS READ CAREFULLY Int Time Allowed: Three
More informationHigh-voltage high-breaking capacity VV fuse-links
High- high- VV fuse-links [A] (ka) [mω] [W] [A 2 s] [A 2 s] 12 580 4 6,1 57 4 A 20 370 9 17,3 164 6 A 25 260 10 36 340 10 A 46 55 7 161 1 530 16 A 60 37 13 250 2 270 20 A 80 30 15 430 3 750 25 A 105 25
More information320A Single Phase URD Meter Loop Installations
320A Single Phase URD Meter Loop Installations Location: The meter loop shall be mounted on the side of the pedestal facing the consumer's lot. (The side being one of the four flat surfaces of the pedestal
More informationDe-Energisation - Frequently Asked Questions
De-Energisation - Frequently Asked Questions 1. Scope This advice is intended for competent electricians working on domestic or small commercial installations with single or three phase supplies, fused
More informationSPECTRA ENGINEERING PTY LTD. MXPS15 Series Technical Manual
SPECTRA ENGINEERING PTY LTD MXPS15 Series Technical Manual MXPS15 Series Spectra Engineering Pty Ltd ABN 65 057 696 438 9 Trade Road Malaga Western Australia 6090 Tel: +61-8-92482755 Fax: +61-8-92482756
More informationTELL CITY ELECTRIC DEPARTMENT RATES AND CHARGES
TELL CITY ELECTRIC DEPARTMENT RATES AND CHARGES As per Ordinances of the Common Council of the City of Tell City, Indiana 04/07/2008 Ordinance 993 05/05/2008 Ordinance 995 07/07/2008 Ordinance 1000 08/03/2009
More informationELECTRICIANS REGULATIONS EXAMINATION 23 November 2013 QUESTION AND ANSWER BOOKLET
ER54 Candidate Code No. For Board Use Only Result Date Result Date Int ELECTRICIANS REGULATIONS EXAMINATION 23 November 2013 QUESTION AND ANSWER BOOKLET Time Allowed: Three hours INSTRUCTIONS READ CAREFULLY
More informationEDS POLE-MOUNTED EQUIPMENT EARTHING DESIGN
Document Number: EDS 06-0015 Network(s): Summary: ENGINEERING DESIGN STANDARD EDS 06-0015 POLE-MOUNTED EQUIPMENT EARTHING DESIGN EPN, SPN This standard details the design requirements for the earthing
More information185mm-System power 2500A. Expertise
185mm-System power 2500A Expertise System advantages The 185mm-System power is designed for use in efficient power distribution assemblies with a high short-circuit withstand capacity. The narrow design
More informationENTRANCE EQUIPMENT ER D PAGE 1 OF 5
PAGE 1 OF 5 USE: Requirements for entrance equipment. PREVIOUS REVISION 07-01-98 ORIGINATED 03-94 PREVIOUS NUMBER ER 100 (12-01-81) LATEST REVISION: Updated meter socket labeling specification and instrument
More informationNota Conductor s Chair
Assembly and Operation Instructions Nota Conductor s Chair CONTENTS Important User Information...........................2 General......................................2 Manufacturer.................................2
More informationA. Submit manufacturer's literature and technical data before starting work.
SECTION 16425 SWITCHBOARD PART 1 GENERAL 1.01 SUMMARY A. Related Section: 1. 16450 - Grounding. 1.02 SUBMITTALS A. Submit manufacturer's literature and technical data before starting work. B. Submit Shop
More informationPower Quality. Power Factor Wiring and Service. Background. Introduction. bchydro.com
Power Quality Power Factor Wiring and Service Scope Power factor is a major consideration in efficient building or system operation. It is the measure of how effectively your equipment is converting electric
More informationRental Industry Safety Tester Safe Check 5s
Rental Industry Safety Tester Safe Check 5s Feb 2006 2006 Clare Instruments Inc. Issue 2.0 Firmware Version : 1.2a Limited Warranty & Limitation of Liability Clare Instruments Inc, guarantees this product
More informationELECTRICIAN S THEORY EXAMINATION 20 June 2015 QUESTION AND ANSWER BOOKLET
Candidate Code No. ET54 For Board Use Only Result Date Int Result Date Int ELECTRICIAN S THEORY EXAMINATION 20 June 2015 QUESTION AND ANSWER BOOKLET INSTRUCTIONS READ CAREFULLY Time Allowed: Three hours
More informationThe following lighting types are NOT compatible with the TT- 402Wireless Inline Dimmers:
TT402 (300W) Incandescent Wireless receiver Inline Dimmer Product Description The TT- 402is a 40-300W dimmable wireless receiver. It can be paired with only circuits 1 and 2 (keys 4 or 5) on the Taptile
More informationMNS Light F. Low-voltage switchgear with fixed units. ABB LV Systems
MNS Light F Low-voltage switchgear with fixed units ABB LV Systems Cubicle design MNS Light F switchgear is a flexible system with a large selection of cubicle variants that can be built together in optional
More informationISO Rules Part 500 Facilities Division 502 Technical Requirements Section Interconnected Electric System Protection Requirements
Applicability 1 Section 502.3 applies to: the legal owner of a generating unit directly connected to the transmission system with a maximum authorized real power rating greater than 18 MW; the legal owner
More information