TECHNICAL SPECIFICATION FOR POWER TRANSFORMER NOTE: Vendor to give their offer in line with this data sheet only. Any deviations/additions/deletions shall be brought out in a separate sheet. A TECHNICAL DATA SHEET HPCL S REQUIREMENT VENDORS COMMENTS 1.0 SCOPE DESIGNING, MANUFACTURING, TESTING, SUPPLYING & COMMISSIONING OF POWER TRANSFORMER 2.0 APPLICABLE CODES IS:335 IS: 2026, PART I, II, III & IV IS: 2147 IS: 3696 IS: 1180, PART I IS: 10028, PART I IS: 11171, 1985 3.0 MAKE TO BE SPECIFIED BY VENDOR 4.0 TYPE DOUBLE WOUND, COPPER CONDUCTOR, ONAN 5.0 SERVICE OUTDOOR TYPE 6.0 CAPACITY 1500 kva (REFER TERMS & CONDITIONS) 7.0 NO LOAD VOLTAGE 33 kv / 11 kv RATIO 8.0 FREQUENCY & PHASES 50 HZ, 3 PHASE 9.0 INSULATION CLASS A 10.0 WINDING INSULATION Primary: Uniform; Secondary: Uniform 11.0 POWER FLOW Unidirectional 12.0 NORMAL LOAD(% of 80% ONAN Rating) 13.0 CONNECTION DELTA / STAR 14.0 VECTOR GROUP Dyn 11 15.0 TAP CHANGER ON LOAD TAP CHANGER 16.0 TAPPING RANGE & STEPS -12.5% TO + 12.5% IN STEPS OF 2.5% 17.0 ONLOAD TAP CHANGER /RTCC - WITH REMOTE CUBICLE. - AUTOMATIC VOLTAGE CONTROL, LOCAL / REMOTE OPERATION TO BE PROVIDED. - SINGLE FLOAT BUCHHOLZ
PROVISION OF OLTC PANEL PARAMETERS FOR ECS/REMOTE INTERFACE 18.0 MAX. AMBIENT TEMPERATURE 18.1 TEMPERATURE RISE IN WINDING TEMPERATURE 18.2 TEMPERATURE RISE IN RELAY / OIL SURGE RELAY. - ADDITIONAL LOOSE SUPPLY OF TAP POSITION INDICATOR, RAISE / LOWER PUSH BUTTONS, TRANSDUCERS & NECESSARY INTERFACE TO BE PROVIDED ON RTCC. CONTACTS FOR OLTC TROUBLE ALARM, TAP POSITION 48 C 55 C AS MEASURED BY RESISTANCE 45 C TOP OIL 19.0 NO LOAD LOSS WITHIN IS SPECIFIED TOLERANCE LIMITS AT RATED VOLTAGE AND FREQUENCY. 20.0 FULL LOAD LOSS WITHIN IS SPECIFIED TOLERANCE LIMITS AT 75 C AND AT PRINCIPLE TAP. 21.0 IMPEDANCE AT 75 C AND AT PRINCIPLE TAP 22.0 SYSTEM NEUTRAL EARTHING 23.0 DEGREE OF PROTECTION IP-55 24.0 TERMINATION PRIMARY SIDE 25.0 TERMINATION SECONDARY SIDE 26.0 NEUTRAL GROUNDING RESISTOR (NGR) Continuous Rating (as 10% of short time rating) VENDOR TO SPECIFY. Secondary: Resistance Earthing OUTDOOR TYPE H.T. CABLE BOX SUITABLE FOR 3 CORE, 120 SQ.MM, 33 kv GRADE, XLPE ARMOURED CABLE. (on the small side of Transformer) OUTDOOR TYPE H.T. CABLE BOX SUITABLE FOR 3 CORE, 185 SQ.MM, 11 kv GRADE, XLPE ARMOURED CABLE (on the side at right angle to the primary terminal side) Rated Voltage: 6351 V Required Terminal Connections Transformer Neutral to NGR: 185 Sq.mm AL conductor, XLPE insulated 11KV armored cable.
NGR to Earth: 75 X 10 sq.mm GI earth strip. 27.0 PAINT & SHADE EPOXY PAINT OF SHADE RAL 7035 B ACCESSORIES 1.0 OIL CONSERVATOR WITH DRAIN PLUG WITH OIL LEVEL INDICATOR 2.0 VALVE BETWEEN CONSERVATOR & TANK 3.0 DIAL TYPE THERMOMETER 4.0 SAMPLE VALVE, TOP/BOTTOM FILTER VALVE & DRAIN VALVE 5.0 DOUBLE DIAPHRAGM EXPLOSION VENT & AIR RELEASE PLUG 6.0 EARTHING TERMINALS 2 NOs. 7.0 SILICA GEL BREATHER 8.0 LIFTING LUGS AND FOUR BIDIRECTIONAL FLAT ROLLERS 9.0 BASE CHANEL WITH TOWING LOCK 10.0 DIAGRAM PLATE & RATING PLATE 11.0 DOUBLE FLOAT BUCHHOLZ RELAY WITH ALARM AND TRIP CONTACTS 12.0 WINDING TEMPERATURE INDICATOR 13.0 RADIATOR WITH COOLING LUBE 14.0 MARSHALLING BOX (IP- 55)FOR AUXILIARY WIRING 15.0 TAP CHANGER (OLTC/RTCC) C PERFORMANCE & PARAMETERS 1.0 NO LOAD LOSS AT RATED VOLTAGE & FREQUENCY (OPERATION OF TRIP CONTACT OF THE RELAY SHOULD TRIP THE VCB IN SUB STATION) WITH ALARM & TRIP CONTACTS AND MAXIMUM READING POINTER WITH RESETTING FACILITY. WITH LOCKING ARRANGEMENT AND POSITION INDICATOR VENDOR TO SPECIFY
(Guaranteed) 2.0 LOAD LOSS AT RATED VENDOR TO SPECIFY CURRENT AT 75 C (Guaranteed) 3.0 % IMPEDANCE AT RATED VENDOR TO SPECIFY CURRENT AND FREQUENCY AT 75 C 4.0 REACTANCE AT RATED VENDOR TO SPECIFY CURRENT & FREQUENCY AT 75 C 5.0 EFFICIANCY AT 75 C AT U.P.F. 5.1 AT FULL LOAD VENDOR TO SPECIFY 5.2 AT 75% LOAD VENDOR TO SPECIFY 5.3 AT 50% LOAD VENDOR TO SPECIFY 6.0 REGULATION AT FULL LOAD @75 C 6.1 AT U.P.F VENDOR TO SPECIFY 6.2 AT 0.8 P.F. VENDOR TO SPECIFY 7.0 WEIGHT VENDOR TO SPECIFY 7.1 CORE VENDOR TO SPECIFY 7.2 WINDING VENDOR TO SPECIFY 7.3 TANK & FITTINGS VENDOR TO SPECIFY 7.4 OIL VENDOR TO SPECIFY 8.0 DIMENSIONS 8.1 LENGTH VENDOR TO SPECIFY 8.2 BREADTH VENDOR TO SPECIFY 8.3 HEIGHT VENDOR TO SPECIFY D SPECIAL REQUIREMENTS 1.0 TYPE TEST CERTIFICATE FOR THE GIVEN CAPACITY FROM CPRI 2.0 SURGE WITHSTAND CAPACITY TRANSFORMER SHOULD WITHSTAND SURGE DUE TO STARTING OF HIGH RATING
3.0 DETAILS OF CORE WINDING AND SATURATION LEVEL OF CORE 4.0 DRAWINGS AND DATAS (4 COPIES) PUMP MOTORS (LARGEST MOTOR IS OF 110 KW IN STAR- DELTA MODE) -OUTLINE DIMENSIONAL DRAWINGS AND THE GENERAL ARRANGEMENT OF TRANSFORMER AND ACCESSORIES SHOWING ALL REQD. CLEARANCES -FOUNDATION PLAN DRAWINGS -WIRING DIAGRAM FOR W.T.I. & MARSHALLING BOX. 5.0 INSTRUCTION MANUAL 4 SETS REQUIRED COVERING OPERATION & MAINTENANCE. 6.0 PACKING - TRANSFORMER SHOULD BE SUITABLY PACKED. PACKING IN A WOODEN CASE IS NOT REQUIRED. HOWEVER, SUPPLIER HAS TO SUPPLY A TARPAULIN FOR COVERING. - CONSERVATOR TO BE PACKED SEPARATELY 7.0 UNLOADING AT SITE BY HPCL 8.0 TESTING AND COMMISSIONING E SCOPE OF THIRD PARTY INSPECTION. BY VENDOR AS PER SCOPE OF WORK. Note: The Guaranteed parameter of Iron & Copper losses will be taken into consideration for evaluation of bids and the actual Iron & Copper losses based on the factory testing, duly certified by TPI shall be reviewed to assess the applicability of penalty. (Please refer terms and conditions for calculation of loading and penalty criteria) 1.0 AGENCIES THIRD PARTY INSPECTION SHALL BE ARRANGED BY THE VENDOR ON THEIR OWN COST BY ONE OF THE FOLLOWING AGENCIES: - D N V / CE I L / L L O Y D S / I R S/ BV
2.0 ACTIVITIES TO BE CARRIED OUT BY THIRD PARTY INSPECTION AGENCIES F MAKE OF ACCESSORIES CERTIFYING THE FOLLOWING TESTS ON THE TRANSFORMER: -RATIO TEST, POLARITY TEST & VECTOR GROUP TEST -IMPEDANCE VOLTAGE TEST -SPECIFIC RESISTANCE TEST -INSULATION RESISTANCE TEST OF PRIMARY, SECONDARY WINDINGS AND BETWEEN CORE AND WINDINGS - NO LOAD LOSSES AND CURRENT TEST - LOAD LOSSES TEST - INDUCED OVERVOLTAGE WITHSTAND TEST - THIRD PARTY INSPECTION AGENCY SHALL GIVE A CERTIFICATE TO THE EFFECT THAT ENTIRE TRANSFORMER ALONG WITH THE ACCESSORIES CONFORM TO THE SPECIFICATIONS GIVEN IN THE PURCHASE ORDER. TRANSFORMER SHALL BE TESTED BY THE MANUFACTURERS AS PER THE RELEVANT CODES AND THE CERTIFICATES SHALL BE PROVIDED TO THE THIRD PARTY INSPECTION AGENCY DURING THE INSPECTION FOR THEIR VERIFICATION AND ENDORSEMENT. ONE COPY OF THIRD PARTY INSPECTION REPORT AND TEST CERTIFICATES SHALL BE SENT TO SITE ALONG WITH THE TRANSFORMER AND BALANCE 2 COPIES SHALL BE SENT ALONG WITH THE INVOICE. (In case the vendor intends to provide the accessories of make not indicated below, the same shall be done with the approval from HPCL) 1 BUCHHOLZ RELAY A J SERVICES/ ATVUS 2 MAGNETIC OIL LEVEL INSTRUMENT & CONTROL / GAUGE SUKRUT UDYOG 3 OIL TEMPERATURE PERFECT CONTROL /
INDICATOR PRECIMEASURE 4 WINDING TEMPERATURE INDICATOR CONTROL 5 CURRENT TRANSFORMER PERFECT CONTROL / PRECIMEASURE ABB/ ELECTRIC CONTROLS & SYSTEMS / KAPPA ELECTRICALS/PRAGATI ELECTRICALS / ALSTOM 6 OLTC BHEL / CGL / TRANSFORMERS & ELECTRICALS KERALA LTD. /EASUN-MR TAP CHANGERS PVT. LTD. /ONLOAD GEARS / CTR MANUFACTURING INDUSTRIES LTD. 7 Control Switches Alstom / Siemens / L&T / Switron Devices / Havells / Hotline Switchgear & Controls / Kaycee / Reliable Electronic Company Pvt.Ltd. 8 Fuse / Fusebase Siemens / L&T / GE Power Control / Indo-Asian Fuse Gear