: INR 232, OR USD (or equivalent Amount in any currency) Material Description Quantity UOM

Transcription

1 IMPORTANT NOTE BID DOCUMENT HAS BEEN DISPLAYED TO UNDERSTAND THE REQUIREMENT ONLY. PARTIES INTERESTED TO PARTICIPATE AGAINST THIS TENDER SHALL HAVE TO PURCHASE THE TENDER DOCUMENTS FROM ANY OF OIL S DESIGNATED OFFICES GIVEN BELOW. BID DOCUMENTS (NON- TRANSFERABLE) CAN BE PURCHASED TILL ONE DAY PRIOR TO THE RESPECTIVE BID CLOSING DATE ON PAYMENT OF TENDER FEE (NON- REFUNDABLE) OF US$ OR RS. 4, (EXCEPTING PSUS AND SSI UNITS) FROM : (A) HEAD - MATERIALS, OIL INDIA LIMITED, P.O. DULIAJAN, ASSAM , (B) HEAD - KOLKATA BRANCH, OIL INDIA LIMITED, 4-INDIA EXCHANGE PLACE, KOLKATA , (C) SENIOR ADVISER(CONTRACT & PURCHASE), OIL INDIA LIMITED, PLOT NO. 19 SECTOR 16 A NOIDA PROOF OF PURCHASE OF TENDER DOCUMENTS MUST BE SUBMITTED ALONG WITH THE OFFER, FAILING WHICH OFFERS WILL BE TREATED AS UNSOLICITED.

2 Page : 1 / 2 OIL INDIA LIMITED (A Govt. of India Enterprise) P.O. Duliajan , Assam. Fax No , material@oilindia.in Tender No. & Date : DFD8613P08/ Tender Fee Bid Security Amount : INR 4, OR USD : INR 232, OR USD (or equivalent Amount in any currency) , Bidding Type : Two Bid Bid Closing On Bid Opening On : at 13:00 hrs. (IST) : at 13:00 hrs. (IST) Performance Guarantee : Not Applicable OIL INDIA LIMITED invites Global tenders for items detailed below: Item No./ Mat. Code 10 0C Material Description Quantity UOM SUPPLY AND COMMISSIONING OF 250 KVA NATURAL GAS ENGINE DRIVEN GENERATING SET WITH ACOUSTIC ENCLOSURE AS PER DETAILED SPECIFICATION, BRC/BEC AND OTHER TERMS & CONDITION VIDE ENCLOSED ANNEXURES. 2 NO Detailed specification furnished vide ANNEXURE-IA INSTALLATION & COMMISSIONING 10 INSTALLATION & COMMISSIONING Installation, Commissioning, Testing and Handing Over of the supplied Gen sets 1 NO Special Notes : 1. Bids are invited under Single Stage Two Bid System. Bidder shall quote accordingly under Single Stage Two Bid System. The "TECHNICAL" & "COMMERCIAL" bids shall be prepared separately in triplicate and the same should be kept in two separate envelopes superscribing the Enquiry No., Brief Material Description and Bid Closing Date and clearly writing on the cover of the two envelopes as "TECHNICAL" & "COMMERCIAL". Both the envelopes should then be kept in one envelope duly sealed, superscribing the Enquiry No., Brief Material Description and Bid Closing Date on the cover. The Technical bid should contain all the Techno-Commercial details of the offer including the Commercial terms and conditions excepting the prices which should be kept blank. The Commercial bid should contain the Price Schedule including all the Commercial terms and conditions of the offer. Any offer not complying with the above will be rejected straightway. 2. Payment : Payment shall be released as follows : i) 80 % of the order value shall be paid against despatch/shipment of the goods. ii) Balance 20 % of the order value along with the commissioning charges shall be paid after successful commissioning and acceptance of the Gen.Set by OIL. iii) OIL may also consider 100 % payment against shipment/despatch document provided bidders agree to pay the interest for 20 % of order value and also submit Bank Guarantee equivalent to 20 % of the order value in addition to the Performance Sucurity of 10 %.

3 Tender No. & Date : DFD8613P08/ Page : 2 / 2 Any offer not complying with the above shall be loaded at one percent above the prevailing Bank rate (CC rate) of State Bank of India for evaluation purpose. 3. Bid Rejection Criteria (BRC) and Bid Evaluation Criteria (BEC) applicable to this tender is enclosed vide Annexure II. 4. Technical Check-list and Commercial Check-list vide Annexure III & IV must be filled-up and submitted along with the Technical Bid. 5. Oil India Purchase Order No. must be engraved on the body of the item. Bidder must confirm the same categorically while quoting. 6. Bidders shall categorically confirm in their quotation that the equipment to be supplied are not going to be obsolete for next 10 years and provision for supplying spares of the equpment will be continued. 7. To ascertain the substantial reponsiveness of the bid OIL reserves the right to ask the bidder for clarification in respect of clauses covered under BRC also and such clarifications fulfilling the BRC clauses in toto must be received on or before the deadline given by the company, failing which the offer will be summarily rejected. 8. Clause No (under Exemption of Bid Security) of Section A of the General Terms & Conditions for Global Tender (Refer Document No.MM/GLOBAL/01/2005) stands deleted. 9. The items covered by this enquiry shall be used by Oil India Limited in the PEL/ML areas which are issued/renewed after 01/04/99 and hence Nil Customs Duty during import will be applicable. Indigenous bidder shall be eligible for Deemed Export Benefit against this purchase. Details of Deemed Export are furnished vide Addendum to MM/GLOBAL/01/2005 enclosed. Contd.. Page 3

4 ANNEXURE-IA TO TENDER N0. DFD8613P08/06P06 DETAILED TECHNICAL SPECIFICATIONS, SPECIAL NOTES AND OTHER TERMS AND CONDITIONS FOR SUPPLY, INSTALLATION, TESTING, COMMISSIONING AND HANDING OVER of 250 KVA GAS ENGINE DRIVEN GENERATING SET WITH ACOUSTIC ENCLOSURE. 1.0 SCOPE: The scope of the bidder shall be SUPPLY, INSTALLATION, TESTING, COMMISSIONING AND HANDING OVER of 250 KVA, 415 Volts, 3 Phase, 50 Hz Industrial type, Natural Gas Engine driven Generating sets with Acoustic Enclosure and with all accessories. The Gen set is the primary source of Power for the application. 2.0 GAS ENGINE : The gas engine should be a four stroke, multi cylinder, turbocharged/natural aspirated, heat exchanger/ radiator cooled engine rated for continuous power and capable of developing at least 290 Net Brake Horse power at 1500 rpm with a maximum compression ratio of 10:1. Only single stage turbo charging is allowable. The engine should comprise of the following sub systems ENGINE SUB SYSTEM : a) Cooling System The cooling system of water cooled engine should comprise of an engine mounted water pump, an industrial type heavy duty radiator/ heat exchanger suitable for operation in ambient temperature of 48 Deg C and a blower fan. (i) The engine jacket water cooling system should be a closed circuit design with provision for filling, expansion, and de-aeration. The cooling pump should be driven by the engine. Auxiliary coolant pump required for heat exchanger or separate circuit after cooling should also be engine driven. Coolant temperature should be internally regulated to disconnect external cooling system until operating temperature is achieved. (ii) Radiator, Engine Mounted: Heat rejected to the engine jacket water shall be discharged to the atmosphere through a close coupled radiator. The radiator shall be sized to cool the engine continuously while operating at full rated load and at site conditions of 48 Deg C ambient. (iv) Blower Fan: The radiator cooling fan shall be a blower type driven from the engine. Air shall be drawn from the engine side and exhausted through the radiator core with no more than 12.7 mm( 0.5 Inch ) of water external restriction in addition to core restrictions. (v) Fan and Belt guarding: The fan, fan drive, and fan belts shall be covered with punched steel mesh guarding for personnel protection. b) Air Intake System 1

5 The air intake system should comprise of a heavy duty engine air cleaner mounted on the engine with a vacuum indicator and air intake manifold with dry element requiring replacement no more frequently than 500 hours or once each year. c) Electric Starting System : The engine should have an electric starting system comprising of a Maintenance Free Heavy Duty Battery pack of reputed make having a minimum capacity 180 ampere hours with a alternator mounted on the engine for a battery charging and a 24 Volt starter ( preferably of LUCAS TVS/DELCO REMY make), starter relay, and automatic reset circuit breaker to protect against butt engagement. Batteries shall be maintenance free, lead acid type mounted near the alternator. Batteries should be housed in a hard rubber or polypropylene case with provision for venting. Required cables should be furnished and sized to satisfy circuit requirements. d) Battery Charger: The battery charger is to be a solid-state device with adjustable float voltage control. It is to be a constant voltage device with current limit, and it is to include an equalize switch which will allow the battery to be overcharged for maintenance purpose. e) Ignition System : The ignition system should be a shielded ignition comprising Altronic III/V Engine driven ignition timer, Ignition Coil, High Tension and Low Tension Wiring Harness, Transformer and Spark Plugs shall incorporate gold palladium electrodes for reliability and life ( Preferably STITT/ CHAMPION make) f) Exhaust System : (i)the exhaust system should comprise of water cooled exhaust manifold, stainless steel exhaust flexible connection, residential type exhaust silencer, spark arrestor and piping connections (ii) Heavy walled piping of schedule 40 with radii of 90 Deg bend at least 1½ times the pipe diameter. Piping should be installed with appropriate insulation and shielding. (iii) Piping should be supported and braced to prevent weight or thermal growth being transferred to the engine and flexible expansion fittings provided to accommodate thermal growth. g) Fuel System : The fuel system should comprise of *governor(preferably WOODWARD make), carburetor ( preferably IMPCO make ), main line and secondary line gas pressure regulator ( Preferably VANAZ/FISHER make ), gas filter and related linkages. The first stage regulator is to have an inlet pressure rating of 20 psig and Outlet pressure Rating of 7 Psig. * Governor, Electronic Speed Control: The engine governor shall be a Woodward Electronic Speed Control with EG Electro-Hydraulic actuator or Barber Coleman Equal 2

6 .Speed drop shall be extremely adjustable from 0 ( isochronous) to 10% from no load to full rated load. Steady state frequency regulation shall be + / percent. Fuel inlet line to the engine shall be having stainless steel flexible connection to take care of vibration/shock if any, in the system. h) Lubricating System : The lubricating system should comprise of lubricating oil pump, lubricating oil filter with a replaceable paper element, lubricating oil cooler, lubricating oil pan and crankcase breather. (i) The lubricating oil pump shall be a positive displacement type that is integral with the engine and gear driven from the engine gear train. The system shall incorporate full flow filtration with bypass valve to continue lubrication in the event of filter clogging. (ii) The bypass valve must be integral with the engine filter base of receptacle. i) Instrument Panel : The engine mounted instrument panel shall consist of a shock-mounted formed and welded enclosure. Provide Metric marked gauges as above. The instrument panel should include the following : a) Lubricating Oil pressure gauge b) Lubricating oil temperature gauge c) Water temperature gauge d) Starting Switch e) Ignition Switch f) Mechanical/Digital tachometer and hour meter g) Circuit Breaker h) Ampere meter i) Electric service meter j) Engine Safety Controls : Engine mounted safety shut off/trip system for tripping the engine in the event of a) Low lubricating oil Pressure b) High cooling water temperature c) Engine over speed d) Over crank k) Other Features : a) flexible coupling / direct coupling b) AVM Pad. c) flywheel with housing d) lifting eyes e) coupling guard if applicable f) guards over belt drives ( blower fan, water pump drive pulley, timing pulley) g) standard painting h) suitable hand throttle control 3

7 i) mechanical hour meter j) SAE standard rotation. k) Gas shut off valve for engine fuel gas line should close automatically when the engine is stopped. N.B: Provision of guards over belt drives and couplings has become mandatory as per recommendation of OISD ( Oil Industry Safety Director) & DGMS ( Director General of Mines & Safety ) 2.2 GENERAL NOTES ON ENGINE : a) The engine shall conform to ISO : 3046 specifications and shall be rated for continuous power with an over load power rating of 110% of the continuous power corresponding to engine application for a period of 1 hr within a period of 12 hrs operation. b) The engine governing should be in accordance with Class A Governing specified in BS : 3109 : 1985 ( or latest) c) The bidder should submit the following information along with relevant performance rating Curves and engine product catalogue: i) Gross HP developed at rated RPM ii) Deduction for fan and other ancillary equipment. iii) Net HP developed at rated RPM iv) Specific fuel consumption at rated power as well as at 110%, 75%, 50% and 25% of rated load d) A suitable selected flexible coupling should be incorporated to transfer power from the engine to the alternator. A guard should be provided to cover the same to meet OISD norms e) The generating set should be suitable for operation at the following site condition : Maximum Temperature : 48 DEG C Minimum Temperature : 05 DEG C Maximum Humidity at 21 DEG C : 100 % at 35 DEG C : 95 % at 41 DEG C : 70 % Maximum Altitude above sea level : 150 Meter f) Composition of Fuel Gas : The engine should be capable of developing required BHP as detailed in para 2.0 above with fuel composition given below- CONSTITUTION % VOLUME Methane Ethane Propane Butane- Pentane 6-3 Nitrogen 94.5 Carbon-dioxide

8 Iso-Butane N-Butane Iso-Pentane N-Pentane Hexane Gravity Gross Calorific Value BTU/CFT Net Calorific Value BTU/CFT g) The fuel gas system shall consists of a minimum of following components but shall not be limited to these : a) Main line pressure regulator. b) Pressure relief safety valve. c) Gas scrubber tank. d) Gas fuel filter. e) Interconnecting gas piping from main line pressure regulator to engine. f) The gas conditioning & piping should be carried out in such a way as to prevent condensate carry over to engine ALTERNATOR: 1. Make : Stamford/Kirloskar/Crompton/NGEF/Kato/Caterpillar 2. Rated Output : 250 KVA 3. Rated Voltage : 415 Volts ± 6% 4. Phase : 3 phase - 4 wire 5. Frequency : 50 Hz ± 3% 6. No. of Poles : 4 7. RPM : Rated power factor : 0.8 lagging 9. Conductor Material. : Copper 10. Type : Industrial 11. Duty : Continuous base load duty 12. Class of insulation : Class F / H 13. Phase sequence : UVW ( Phase sequence and direction of rotation shall be clearly marked on the alternator.) 5

9 14. Connection : Y ( Star ) 15. Site Condition : Temp.= 5-40 deg C, RH = 95%, Alt = 150 Meter 16. Alternators Internal Protection (Enclosure) : IP Alternators Terminal Box protection : IP Cooling : Air cooled by integral fan 19. Excitation system : Brush less, self excited and self regulated. The brush less alternator shall be composed of 3-phase AC exciter with rotating diodes, pilot exciter and static voltage regulator with voltage adjuster potentiometer, main field windings and stator windings. At nominal speed the exciter must produce sufficient residual voltage in order to ensure perfect excitation. 20. Automatic Voltage Regulation : The machine shall be voltage regulated & shall maintain a voltage accurate to ± 0.5% to ± 1.0% in any condition between no load & full load even if its speed fluctuates by ± 4%. AVR should be mounted in the control panel with rubber washers to arrest vibration. AVR should have under speed, over excitation protection features with LED display. 21. Permissible voltage variation at rated : + 2 % speed, and power factor 22. Voltage swing (transient response) : When rated load is suddenly switched ON voltage dip shall be limited to 5-10% and will be corrected within 0.2 # 0.7 sec. 23. Permissible Engine Speed variation : When the speed of engine is 1.2 times for two minutes, the alternator should be capable of withstanding it without any damage. 24. Permissible frequency variation at rated : + 2 % speed and power factor 25. Period for taking load from start impulse : 5 sec 26. Motor starting ability : 200 % for 20 sec. 27. Overload capacity : Should be capable of sustaining a 10 % overload for one hour in any 12 hours operation. 28. Unbalanced current carrying capacity : 20 % 29. Short circuit current withstand capacity : Alternator should be capable of sustaining short circuit current 3 to 4 times of full load current for 3 seconds. 30. Over voltage : The alternator should be capable of operation over a range of 110 % of rated voltage 31. Mounting : Foot mounted on anti vibration pads 6

10 32. Amplitude of vibration at no load : 100 micron 3.1 GENERAL NOTES ON ALTERNATOR : 1. The alternator shall be of proven design. 2. Alternator and AVR shall be suitable for humid and corrosive atmosphere. 3. Alternator s winding terminals shall be connected to 4 terminals of suitably rated tinned copper bars of appropriate length, mounted on sheet moulding compound (SMC) supports, in the cable terminal box. 4. Cable entry arrangement: The alternator terminals & terminal box shall be suitable for terminating 2 nos of 4 core, 120 sq.mm PVC insulated and PVC sheathed armoured copper cable. All cables from the alternator shall be terminated through suitably sized single compression glands on a detachable gland plate at the bottom of the reverse entry terminal box and connections will be made through properly rated tinned copper sweating sockets crimped rigidly to the copper conductors. 5. Earthing system for the alternators (body and neutral) shall be as per the IS: nos. of earth studs shall be provided on both sides of the alternator. 7. Two nos. lifting hooks shall be provided for lifting the alternator. 8. The following information shall be provided: i. Unbalanced current carrying capacity ii. Efficiency of the alternator at 25 %, 50 %, 70 % and 100 % load. iii. Power factor of the alternator at 25 %, 50 %, 70 % and 100 % load. iv. Motor starting capability. v. Dimensional drawings. 9. Name plate (Rating plate): Nameplate shall be fixed on the Alternator frame containing the following minimum information in English language. Manufacturers name, Applicable standards, Serial no., Type, Frame reference, Rated output, Rated power factor, Duty, Rated frequency, Rated voltage, No. of phases, Type of connection, Rated stator current, Rated speed in rpm, Class of insulation, Excitation current and voltage at rated output, Phase rotation, Temperature rise, Year of manufacture. 3.2 STANDARDS The alternator shall conform to the following standards: IS : Noise limit IS : Vibration IS : Governing Standards IS : Enclosure IS : Cooling IS : Mounting 7

11 3.3: TESTING OF ALTERNATOR AT MANUFACTURER S WORKS : All the routine tests and load tests of the alternator (along with the control panel) shall be witnessed by OIL engineers at manufacturer s works. The routine test of the alternator will include the following minimum tests/measurements: - 1. Measurement of winding resistances for generator armature, field, exciter armature and exciter field. 2. Measurement of insulation resistance tests (before and after HV tests) for generator armature and field, exciter armature and field. 3. High voltage (HV) test. 4. Phase sequence test. 5. Voltage regulation test. 6. Vibration measurement. 7. Measurement of noise level. 8. Overload test. 3.4 DOCUMENTS : 1. The following Documents / drawings shall be submitted with the offer GA drawing Technical literature of alternator Catalogues of various components 2. The successful bidder shall obtain approval for the drawings prior to manufacturing of alternator and ten sets of following documents shall be submitted along with the supply GA drawing Technical literature of alternator O&M manual Catalogues of various components All test certificates List of recommended spares for two years 3. One set of the above Documents shall be furnished with the equipment SWITCHGEAR & CONTROLS: Switchgear & Controls will consist of the following: 1. Generator Control Panel 2. Change Over Switch 4.1 GENERATOR CONTROL PANEL : The generator control panel shall be sheet steel clad, self supporting, floor mounting with vibration dampers, cubicle type, dust and vermin proof made of 14G MS CR sheet and built upon rigid framework, having front and rear hinged doors with danger plate fitted on both sides, lifting lugs on top, ventilation louvers with perforated sheet on both sides, 8

12 bottom detachable gland plates, double earthing studs on two sides, complete with suitably sized zinc plated & passivated double nuts and spring washers; as fully described below : It shall broadly have the following compartments / sections. 1) Incomer / Bus bar Section. 2) Generator Protection Section. 3) Generator control section 4) Engine control section A) Incomer / Bus bar Section: This section shall have: 1 No. 630 A 4P, 415V, CFS unit, fused 400 A (Make: Siemens/GEPC/Havells/L&T) 1 no. 630 A, 4 pole, 415V, Moulded Case Circuit Breaker, 50 ka, with adjustable overload so that overload can be set at full load current of the alternator, with remote tripping facility with 230 volt shunt tripping. (Make: Siemens/ /Merlin Gerin/ Legrand). MCCB should trip on the following faults with indication i) Over current & Earth fault ii) Short circuit iii) Earth leakage iv) Over voltage v) Under voltage vi) Incorrect phase rotation 1 set TP & N electrolytic grade, high conductivity, copper bus-bars, conforming to as per IS: 5082, rated 600 amps and supported at required intervals to withstand short circuit fault levels up to 50 KA. Bus-bar support shall be non- hygroscope SMC / FRP and the bus-bar shall be insulated with heat shrinkable PVC sleeves. Cable entry arrangement: All cables to the panel will enter through a detachable gland plate at the bottom of the panel. All cables will be terminated through suitably sized single compression glands and connections will be made through properly rated terminal strips and tinned copper sweating sockets crimped rigidly to the copper conductors. B) Generator Protection Section: This section shall have: Earth leakage relay with CBCT, (Make: Merlin Gerin /Legrand/); ELR shall be adjustable (sensitivity: ma, time: ms) 1 No 3 phase Voltage Monitoring Relay for the following protections (Make: Telemecanique or eqv.) I. Over voltage % II. Under voltage - 85 % with 1-10 seconds time setting III. Incorrect phase rotation 9

13 Suitably rated CTs, class 5P10 for above (Make: Kappa or Eqv.) All relays shall be mounted in front of the panel. C) Generator Control Section: This section shall have: i) Meters: 1 - M.I. Voltmeter, 96 sq. mm, V (Make: AE or eqv.) 1 - Voltmeter selector switch (Make: Kaycee or eqv.) 1 - M.I Ammeter, 96 sq. mm, Amps, C.T. operated (Make: AE or eqv.) 1 - Ammeter selector switch (Make: Kaycee or eqv.) 1 - Digital frequency meter, 48 X 96 mm, scaled Hz, suitable for 240 V AC operation, with a single pole ON / OFF switch (Make: AE or eqv.) 1 - kw meter, Dynamometer type, 3ph, 3 ele, 96 sq.mm, 0 # 200 kw (Make: AE or eqv.) Suitably rated CTs, class I for ammeter, kw meter and PF meter (Make: Kappa or eqv.) All meters shall be mounted in front of the panel. ii) Indications: Indications for the following are to be provided (a) Engine running (b) Power supply on (c) Power supply off (d) Over current and earth fault indication with reset push button (e) Over / under voltage indication with reset push button (f) Over / under frequency indication with reset push button (g) Engine fault (h) Indication for testing of healthiness of trip circuit All indication lamps shall be of LED type (Make: Vinay or eqv.) and shall be mounted in front of the panel. iii) Fuses: All meters, indication lamps shall be protected by adequate nos of HRC instrument fuses of suitable rating (Make: GEPC or eqv.). iv) Auxiliary relays: Auxiliary Relay / Contactors will be provided as per requirement of the control circuit. (Make: Siemens/Telemechanique/L&T) D) Engine control section: This section shall have: Digital RPM meter # 1 No. Engine trip indications: Engine should be stopped with the help of heavy-duty 24V D.C. fuel solenoid on following conditions. a) Engine over speed b) Low lube oil pressure 10

14 c) High water temperature d) Over crank Indication of each of the trips shall be provided in the front door of the Engine control section. Suitable relay/ timer arrangement shall be provided wherever required. Push buttons for (a) Accept (b) Reset (c) Engine stop (d) Lamp test Hooter/alarm to indicate Engine trip on fault 4.2. CHANGE OVER SWITCH ( OFF LOAD ): 1 No. 400 Amp, 4-pole Change over switch (off load), (Siemens / Havells make), shall be mounted in a separate compartment inside the acoustic enclosure. One incoming will be connected to the alternator power from the MCCB with 2 Nos 4C,120 sq mm PVC insulated and PVC sheathed armoured copper cable. The other incomer will be left for connecting other source of power. The outgoing of the changeover switch will be connected to the PMCC. All Terminations will be done thro# suitably sized single compression glands in detachable gland plates and connections will be made through properly rated terminal strips and tinned copper sweating sockets crimped rigidly to the copper conductors. Earthing arrangement will be provided with double earthing studs on two sides and will be connected to the earth bus with suitably sized zinc plated and passivated double nuts and spring washers GENERAL NOTES ON SWITCH GEAR : 1. The Control Panel shall be designed, manufactured and tested as per the latest applicable codes and standards and stringent quality control checks to be carried out at every stage. 2. Copy of CPRI test certificate for type test of the panels will be furnished along with supply. 3. The control wiring shall be done with PVC insulated flexible copper wires of 2.5 sq.mm and each wire shall have a ferrule numbers. The entire wiring will be properly dressed and tested. 4. All control wires shall be brought to terminal strips and from there taken to different controls/devices. All connections shall be done through properly rated lugs. 5. Suitable inscription plates should be provided for the indication lamps, push buttons, selector switches, terminal strips etc. 6. The panels will be so placed in the enclosure that sufficient space shall be available in the front and rear of the panels for inspection & maintenance works on the panels. 7. Neoprene gaskets to be provided wherever required. 11

15 8. Earth Strips of 50 X 6 mm GI shall be provided as earth bus at the rear of the switchgear for the earth connections complete with adequate Nos of zinc plated and passivated studs, nuts, and spring washers TESTING OF PANEL AT MANUFACTURER S WORKS : All the routine tests and load tests of the panel (along with the genset) shall be witnessed by OIL engineers at manufacturers works. The routine test of the panels will include the following minimum tests/measurements: - 1. Physical checks & Operation check of all components 2. HV tests 3. Insulation tests (before and after HV tests) DOCUMENTS : A. The following drawings shall be submitted with the offer GA drawing showing all details Power and control circuit diagrams Bill of materials with catalogues of various components Copy of CPRI test certificate for type test of the panels B The successful bidder shall obtain approval for the drawings prior to manufacturing of equipment/panel and four sets of the following documents shall be submitted with the supply GA drawing showing all details Bill of materials with catalogues of various components Power and control circuit diagrams List of recommended spares for two years All test certificates including copy of CPRI test certificate for type test of the panels C. One set of Power and control circuit diagrams shall be furnished with the equipment. 5.0 ACOUSTIC ENCLOSURE : The salient features of the acoustic enclosure shall be as follows : The generating set comprising of engine coupled with alternator for each set should be placed inside an acoustic enclosure having the following salient features : i. The acoustic enclosure should be of modular construction with the provision to assemble and disassemble easily at site. There should also be adequate provision of taking out the equipment for maintenance / repairing jobs and reinstalling the same after necessary corrective action ii. The engine generator shall be factory enclosed in not less than a 12 gauge cold rolled steel enclosure constructed with corner posts, uprights and headers. The roof shall aid in the runoff of water and include a drip edge. The weather- proof and corrosion resistant acoustic enclosure should be duly surface treated, phosphated and finally powder coated for long lasting finish. The sheet metal components should preferably be hot dip, seven tank pretreated before powder coating with special pure polyester based powder. 12

16 iii. The sound proofing of the enclosure should be done with self extinguishing high quality rock wool / mineral wool conforming to IS The rock wool should be further covered with fiber glass tissue and perforated sheet. The silencer must be such that sound level is 75 dba at 1 meter from the enclosure surface. iv. Exhaust silencer shall be provided of the size as recommended by the manufacturer and shall attenuate the sound to the level noted above. It shall be supplied with a flexible, seamless, stainless steel exhaust connection as well as with all internal pipe work. A rain cap will be supplied to terminate the exhaust pipe. These components must be properly sized to assure operation with minimum back pressure and high sound when installed. The canopy should be finished in synthetic enamel paint incorporating rust inhibitors and aluminum sprayed silencers and spark arrestors to guarantee a superior and long lasting finish. v. There should be carefully designed inlet and outlet baffles / attenuators with corresponding weather louvers and bird mesh allowing sufficient air flow, for the set to operate even under the harshest ambient conditions whilst maintaining specified noise levels. Suitably sized blower should be incorporated to meet total air requirement. vi. The temperature inside the enclosure should be suitable for human comfort. The temperature of exhaust line should not exceed the self ignition temperature of fuel gas. A high temperature trip system ( to shut down the engine by cutting off fuel supply to the engine through the solenoid valve ) with variable setting connected to a thermostatically controlled blower must be provided for eliminating excessive heat dissipated by the engine within the acoustic enclosure. Suitable continuous on line Temperature Monitoring and Control System with Alarm and Shut Down Mechanism should be provided. (a) When the concentration of gas inside the acoustic enclosure reaches 10 % of LEL of gas, audio visual alarm should activate and automatic preventive measure should activate to reduce the concentration of leakage gas. These preventive measures include switching on heavy duty exhaust fan to disperse leakage gas or stoppage of gas leakage itself. (b) When the concentration of gas inside the acoustic enclosure reaches 15 % of LEL of gas ( or any other suitable rating ), the alternator main circuit breaker should trip automatically and subsequently the engine should be shut down instantaneously by automatic device ( i.e., cutting off power supply to the fuel solenoid valve.) vii. A separate Blower of suitable size should be provided and it will be in operation even if the thermostatically controlled blower stops / fails. viii. There should be a provision of emergency shut down of the generating set ( Prime Mover ) from outside the enclosure. ix. The enclosure should be complete with power and control wiring between control panel and alternator and other components like blowers etc with proper size copper cable. The cables should be terminated using gland and tinned copper sweating sockets and run through guard pipe. 13

17 x. The enclosure should have the sufficient space in and around the generating set to facilitate maintenance and operation of the set xi. Acoustic Enclosure s base frame should incorporate necessary facilities for handling and inter location transfer through oil field trucks and its overall dimension should not exceed 9M x 2.5 M x 2.5M ( Length x Width x Height). xii. The control panel for the Generating set should be installed separately on the same skid in a different enclosure ( which need not be acoustic ). The connection from the alternator and control panel should be carried out with 3.5 core 120 sq. mm PVC insulated, PVC sheathed armored copper cable and cable should be terminated with proper size of tinned copper sweating socket and cable glands at alternator and panel end. xiii. All the terminal boxes/junction boxes etc, the battery and self starter connection terminals / and its components should be housed inside DGMS approved intrinsically safe enclosure. NOTE : SPECIFICATION OF CONTINUOUS ON LINE GAS MONITORING SYSTEM Detector / Gas Sensor : Actual Nos of Sensors to be decided based on locations where there is possibilities of gas leakage inside the acoustic enclosure. Type : IR (Infrared), suitable for detection of NATURAL GAS ( By Volume CH4 : %, N2 : %, CO2 : %, C2H6 : %, C3H8 : %, Others : % ) Range : 0 t0 100 % LEL Operating Temperature : 0 to 50 Deg C Display : 4 digit LCD Display Alarm Setting : Variable Shut down setting : Variable Control system : Suitable control system to be provided for alarm and safety shut down of the engine Sensor calibration : Adjustment of Zero & Span on-site Non Intrusive one man calibration, should have facility to calibrate the instrument on spot without disconnecting from power supply by using any portable hand held intrinsically safe calibrator. Detectors must be suitable for hazardous environment i.e., Zone 1 & Zone 2 hazardous area as per OMR, Approval for Detectors / Sensors : Valid DGMS approval certificate must be provided with the offer. 5.1 ENCLOSURE ILLUMINATION: Non Acoustic Enclosure Part : A separate circuit shall be provided for lighting of NON acoustic part of enclosure. Power for the lighting circuit shall be taken from the incoming switch in the control panel through backup HRC fuse & neutral link of 16 Amp rating. Enclosure shall have 2(Two) Nos of 1x40 Watt Tube light luminaries suspended with rigid supports from the roof or wall. These luminaries shall be wired with heavy duty PVC insulated, PVC sheathed, armoured, 3x4 sqmm stranded copper cables. Lights should be switched from individual 6 Amp, C curve, MCBs, mounted on the front cover of the control panel. One no. industrial type 14

18 metallic plug socket of 20 Amp rating with 10 Amp SP MCB for switching shall be provided which shall be mounted on the side of the enclosure and fed from the lighting circuit. Make of Luminaire: Philips Make of Metallic plug & socket: Legrand / Merlin Gerin Make of MCB: Legrand / Merlin Gerin. Acoustic Enclosure Part : A separate circuit shall be provided for lighting of the acoustic part of the enclosure. There shall be only 2 Nos DGMS approved intrinsically safe tube light fitting with control from non acoustic part of the enclosure. Armoured cable and FLP cable glands should be used for wiring purpose inside the acoustic enclosure. Make of Luminaire : Baliga / FCG / SUDHIR NOTE : 1. Bidders should submit layout drawing of the acoustic enclosure indicating positions of engine, alternator etc along with the wiring diagram of the package and will have to be approved by OIL before execution of the order. 2. Enclosure design should be such that for any major maintenance activities the enclosures from any side can be easily dismantled and re-erected. 3. Generating set comprising of Engine, Alternator, and other auxiliaries should be placed inside an acoustic enclosure ( approved by ARAI, Pune/ NPL, New Delhi/ NSTL, Visakapatnam/ FCRI, Palghat / NAL, Bangalore) and the unit should be mounted to a common base frame. The set should have proper arrangement for easy loading /unloading to facilitate ease in transportation. 4. A panel viewing window should be provided to facilitate visual monitoring of the equipment from outside. 5.2 EARTHING ARRANGEMENT: 1 ) The earthing scheme for the unit should be as per BIS ) Two nos. 50x6mm GI straps shall be suitably fixed on the floor of the unit skid as main earth bus. Alternator earth terminals,control panel earth terminals,cos earth terminals,enclosure and truck chassis shall each be connected through two nos. separate 25 x 5 mm GI straps to both the main straps with independent connections at separate points. All Galvanization thickness shall be min. 85 micron as per BIS. 3) The neutral of the alternator will be connected to the neutral bus thru the incomer cable. The neutral bus will be connected by two nos. of heavy duty PVC insulated,pvc sheathed,flexible,single core cables of 50 sqmm size to main earth straps at two independent points.the earth cables shall be suitably supported and protected to avoid any damage and shall be run in galvanized non-flexible conduits. Both ends of the cables shall be 15

19 terminated with lugs and suitably protected against mechanical damage. Make of cables: Finolex / Havells. 4) Both the main earth straps shall extend up to the back side of the enclosure and each strap will be provided with two nos. of zinc coated terminal studs, 15 mm dia at the ends of the straps for connection to system earth. Two nos. of earthing cables of size & type mentioned in point no.3 above and of adequate length shall be provided and one end of each cable shall be connected with tinned copper lugs to the studs of the two straps for external earthing.the free ends of these cables shall be crimped with heavy duty, tinned copper tubular lugs. 5) Six nos of 100 mm diameter, 3 mtr. long earth electrodes designed as per BIS will be driven to earth and interconnection to each other shall be made thru 2 nos of 50X6mm GI straps. All connections will be made by using two nos of suitably sized zinc plated and passivated nuts and bolts. 6) Brick work enclosure of internal dimensions and as instructed by Engineer in charge shall be constructed around each earth electrodes.l=600 mm, B = 600 mm,depth= 400 mm 6.0 GENERAL NOTES : a. The offer will not be acceptable if the party do not quote for all items of the tender and supply, installation, commissioning of all items and cables. b. In their offer the bidder must mention their detailed comments point-wise against each point of tender specifications. Any deviation from the tender specification shall be specifically mentioned. Specific type and make of equipment should be mentioned. All the information required as per tender specifications must be submitted. c. In the event of an order the bidder will submit to OIL within one month of placement of order all documents and drawings as required against each item. d. The manufacture of the equipment is to be started only after written approval of the drawings/ documents by OIL as mentioned in tender against all equipment. e. Bidder will provide with the offer the list of tools and equipment available with the bidder to carryout the installation and commissioning work as per tender. f. The bidder will be responsible for safety of its personnel and safety of all the equipment. All the safety gadgets required for safely carrying out the job shall be provided by the bidder. g. Bidder will be responsible for safe custody of all the items before handing over to OIL. h. Handing over to OIL means supply, installation and commissioning of all items as per order and submission of all the documents and drawings as per order. 16

20 i. The bidder to strictly ensure that all the cut ends of cables, packing materials, leftover items are removed from site after completion of work. j. No environmental damage shall be done while carrying out the job. k. All the test reports must be signed by licensed electricians, jointers and supervisors who have carried out the installation and commissioning work as per order. 7.0 SKID : The skid should be of oilfield type and fabricated from sufficiently strong steel section for carrying the generating set from one place to another from time to time. The engine and alternator should be unitized and mounted on the skid before dispatch. The generator housing shall be one piece and mount directly to the engine flywheel housing without bolted adopter. 8.0 PAINTING : All metal surface shall be thoroughly cleaned and degreased. The under surface shall be prepared by applying a coat of phosphate paint and a coat of yellow zinc chromate primer. After preparation of under surface, the panel shall be spray painted with two coats of epoxy based final paint. Panel finish shall be free from imperfections like pin holes orange peels, run off paint etc. 9.0 SPARE PARTS : Spares for two years normal operation of the generating set should be included in the offer. Item wise breakdown price of spares should also be provided but cost of these spares will not be considered for bid evaluation PARTS LIST, INSTRUCTION MANUAL & DRAWING : A. The supplier should provide two sets each of the manuals and books listed below for each unit: 1.OPERATING INSTRUCTIONS- with description and illustration of all switchgear controls and indicators and engine and generator controls. 2. PARTS BOOKS- that illustrate and list all assemblies, subassemblies and components, except standard fastening hardware ( nuts, bolt, washers etc.). 3. PREVENTIVE MAINTENANCE INSTRUCTIONS- on the complete system that cover daily, weekly, monthly, biannual, and annual maintenance requirements and include a complete lubrication chrt. 4. ROUTINE TEST PROCEDURES- for all electronic and electrical circuits and for the main AC generator. 17

21 5. TROUBLESHOOTING CHART- covering the complete generator set showing description of trouble, probable cause and suggested remedy. 6. RECOMMENDED SPARE PARTS LIST- showing all consumables anticipated to be required during routine maintenance and test. 7. WIRING DIAGRAM AND SCHEMATICS- showing function of all electrical components. 8. One set of drawing showing installation details of the generating set, oilfield type skid, wiring diagram for the control panel ( inclusive of float charger ) and wiring drawing between the alternator and control panel should be provided with each generating set. All control panel diagram and schematic diagram are to be sent to us before supply of order materials. 9. The bidders should provide installation diagram of the set and performance data sheet along with the quotation. 10.The supplier should provide along with the set i) Dynamic load ii) Static load iii) Any unbalanced load B. All manuals and books described above shall be contained in rigid plastic pouches and in digital form along with the gen set. 11.0: INSPECTION AND TEST : a) The plant and materials may be subjected for inspection during manufacture at the purchaser s discretion but such inspection shall not relieve the supplier of his responsibility to ensure that the equipment supplied is free from al manufacturing and other defects and conform to correct specifications. The supplier will be notified in advance, if it is intended to inspect plant or material. b) Pre dispatch inspection of the sets shall be carried out by us at the works of manufacture. Full load testing of the generator sets for output and performance shall be carried out in presence of the purchaser or his representative appointed for the purpose and to his satisfaction. If natural gas to run the engine for full load testing is not available at manufacturer s works, the generating set must be tested at purchaser s premises and accordingly supplier to depute service engineer to commission the set at purchaser s premise. The purchaser, in such case, will provide fuel gas and arrangement for loading the generator. All other appliances, apparatus, labor etc. necessary for the tests shall have to be provided by the supplier at his cost. c) Intimation for pre-despatch inspection must be sent to OIL at least 30 days in advance for inspecting the Generating Sets at manufacturer s premises. d) The generating set shall be acceptable to the purchaser only after satisfactory full load test. 18

22 12.0 TEST CERTIFICATES : The supplier shall submit detailed records and certificates of the foregoing tests to the purchaser. The certificates/records shall be supplied in quadruplicate and those for electrical equipment shall be endorsed # suitable for use in the climatic conditions specified #. Supplier should also certify that spark plug cables are protected and possibility of spark is completely eliminated PACKING : The packing shall be sufficiently robust to withstand rough handling. Boxes/packing cases containing electrical equipment shall be water proof lined. All the matters on the control panel should be packed separately for mounting at site or mounted in such a manner to prevent transit damage INSTALLATION, COMMISSIONING, TESTING AND HANDING OVER : Installation and Commissioning of the generating set and control panels shall be carried out by the bidder in the presence of OIL representatives at its fields at Duliajan, Assam (India). Services of qualified and competent personnel from equipment manufacturer is essential during installation and commissioning of the generating sets. Persons engaged for installation, testing and commissioning of alternator and control panel should have valid electrical license issued by State Licensing Board.. A person who is authorized for supervision of all electrical works should have valid supervisory license. Materials such as line pipes, fittings necessary for fabricating fuel/ water lines, supports for engine exhaust shall be provided by OIL. However bidder has to arrange welding and cutting facilities that may be required during installation and commissioning the generating sets. OIL will provide necessary statutory permits for welding and cutting jobs in classified areas as and when required. Note : Once commissioned at designated site the generating set will be subjected to a trial run (reliability run) on available load for a minimum period of 72 hrs continuously and on satisfactory performance shall be subsequently handed over to OIL RESPONSIBILITY: The responsibility for performance to the specifications shall not be divided among individual component manufacturers, but must be assumed solely by the primary manufacturer. This includes generating system design, manufacture, test, and having a local supplier responsible for service, parts and warranty for the total system AFTER SALES SERVICE : The nature of after sales service, which can be provided by the supplier, during initial erection and commissioning as also subsequent operation should be clearly stated in the quotation. 19

23 17.0 DATA SHEET FOR ENGINE MAKE MODEL NUMBER OF CYLINDER ASPIRATION COMPRESSION RATIO SIZE ( BORE & STROKE) DISPLACEMENT DUTY GROSS HP AT 1500 RPM DEDUCTION FOR FAN, ALD & TEMP. NETT HP AVAILABLE AT 1500 RPM SPECIFIC FUEL CONSUMPTION # 100% LOAD # 75% LOAD # 50% LOAD LUB OIL CONSUMPTION( LT/HR) ENGINE SUMP CAPACITY ENGINE RADIATOR/ HEAT EXCHANGER CAPACITY( LTS) MAKE & TYPE OF GOVERNOR LENGTHX WIDTH X HEIGHT 18.0 DATA SHEET FOR ALTERNATOR : Make : Rated Output : Phase : Frequency : No. of Poles : RPM Rated power factor : Conductor Material. : Type : Duty : Class of insulation : : Connection : Site Condition : Alternators Internal Protection (Enclosure) : Alternators Terminal Box protection : Cooling : Excitation system : Automatic Voltage Regulation : Permissible voltage variation at rated : speed, and power factor 20

24 Voltage swing (transient response) : Permissible Engine Speed variation : Permissible frequency variation at rated : speed and power factor Period for taking load from start impulse : Motor starting ability : Overload capacity : Unbalanced current carrying capacity : Short circuit current withstand capacity : Over voltage : Mounting : Amplitude of vibration at no load : 19.0 DATA SHEET OF PANEL AND INSTRUMENTS : 1 MAIN SWITCH a) Make b) Rating c) Cat No/ Type 2 MCCB a) Make b) Rating c) Cat No/Type 3 Earth Leakage Relay a) Make b) Range c) Cat No/Type 4 Voltage Monitoring Relay a) Make b) Range c) Cat No/Type 5) Digital RPM Meter a) Make b) Range c) Cat No. 6) COS a) Make b) Rating c) Cat No All the components including CT, indicating meters, fuses, push buttons etc. should be as per NIT *************** 21

25 ANNEXURE-II TO TENDER N0. DFD8613P08/06P06 BID REJECTION CRITERIA (BRC)/BID EVALUATION CRITERIA (BEC) I) BID REJECTION CRITERIA (BRC) The bids must conform to the specifications, terms, and conditions given in the NIT. Bids shall be rejected in case the items offered do not conform to the required minimum / maximum parameters stipulated in the technical specifications and to the respective international / national standards wherever stipulated. Notwithstanding the general conformity of the bids to the stipulated specifications and terms and conditions, the following requirements shall have to be particularly met by the bidders, without which the offer will be considered as non-responsive and rejected : A.1 BRC TECHNICAL: i) The gas engine should be a four stroke. Naturally aspirated, radiator cooled engine, conforming to ISO 3046 / BS 5514 / IS standards and capable of developing a net minimum of 290 at 1500 rpm with a maximum compression ratio of 10:1 ii). The Alternator must be brushless type iii) Bidders should have the experience of successfully completing at least one order in the last 10 (ten) years before the bid closing date of this enquiry against supply, installation, commissioning and testing of Gas Engine driven Generating sets of capacity 10 KVA or above along with the Control Panels and accessories in PSUs, Central Govt. or any other reputed Company. Documentary evidence in this regard must be provided along with the quotation failing which offer will be rejected. iv) Bidder should be an OEM or authorized dealer of OEM for the engine, alternator, the complete generating set an OEM approved assembler of generating sets or his authorized representative. v) If the bidder is an OEM of engine or their authorized dealer then he must purchase the Alternator from OEM of Alternator or their authorized dealer and vice versa and necessary documentary certificates from the OEM must be submitted along with the offer. vi) If the bidder is an OEM approved assembler of generating sets, he must purchase the engine and the Alternator from OEM or their authorized dealers. Documentary evidence in this regard must be enclosed with the offer failing which offer will be rejected. A.2 COMMERCIAL : 1.0 Bids are invited under Single Stage Two Bid System. Bidders shall quote accordingly under Single Stage Two Bid System. The TECHNICAL and COMMERCIAL bids shall be prepared separately in triplicate and the same should be kept in two separate envelopes superscribing the Enquiry No., Brief Material Description & Bid Closing Date and clearly writing on the cover of the two envelopes as TECHNICAL and COMMERCIAL. Both the envelopes should then be kept in one envelope, duly sealed, superscribing the Enquiry No., Brief Material Description and Bid Closing Date on the cover. The Technical Bid should contain all the techno-commercial details of the offer including the commercial terms and conditions excepting the prices which should be kept 22