Bids Are Invited For Trfr,3P,11/6.6Kv,2000Kva Transformer Phase : 3P Voltage : 11/6.6Kv Power, Rated : 2000Kva Transformer,2000Kva,11/6.6Kv,Ynd11 Rated Kva : Hv-2000Kva Lv-2000Kva Reference Standard: Transformer - Is :2026 -2011 Oil -Is : 335 : , Bokaro-Jharkhand

Bids Are Invited For TRFR,3P,11/6.6KV,2000KVA TRANSFORMER PHASE : 3P VOLTAGE : 11/6.6KV POWER, RATED : 2000KVA TRANSFORMER,2000KVA,11/6.6KV,YND11 RATED KVA : HV-2000KVA LV-2000KVA REFERENCE STANDARD: TRANSFORMER - IS :2026 -2011 OIL -IS : 335 : 2018 PHASES :3 SERVICE :OUTDOOR MOUNTING :PLINTH WOUND : DOUBLE TEMP. RISE IN OIL [DEGREE C.]: 50 ABOVE AMBIENT TEMP RISE IN WINDING [DEGREE C.]: 55 ABOVE AMBIENT AMBIENT TEMPERATURE:50 WINDING MATERIAL: ELECTROLYTIC COPPER TYPE OF COOLING: ONAN VECTOR GROUP: YND11 FREQUENCY [HZ.]: 50 PHASE:3 INSULATION LEVEL (KV/KVP): HV-35/75,LV-22/60 PRIMARY CONNECTION (HV): STAR PRIMARY VOLTS: 11000V (UNEARTHED) PRIMARY TERMINALS:3 PRIMARY RATED CURRENT: 105A SECONDARY CONNECTION (LV): DELTA SECONDARY VOLTS:6600V (UNEARTHED) SECONDARY TERMINALS:3 SECONDARY RATED CURRENT: 175A TAPS ON PRIMARY WINDING FOR PRIMARY VOLTAGE VARIATION OFF CIRCUIT TAP CHANGER IN STEP OF 2.5% : +5% TO -5% NO. OF SWITCH POSITIONS : 4 STEP 5 POSITION TERMINAL ARRANGEMENT HV- CABLE BOX, LV-CABLE BOX LOSSES NO LOAD LOSSES [WATTS]: 2000[+IS TOLERANCE] LOAD LOSSES [WATTS] : 22000[+IS TOLERANCE] IMPEDANCE (Z) [PERCENTAGE] HV-LV: 7.59 % AT 75 DEG CEL AT NORMAL TAP ONE WTI AND ONE NEUTRAL CT TO BE PROVIDED IN SECONDARY CABLE BOX SPECIFICATION OF CT TO BE PROVIDED WTI CT RATIO= 250/3A, 15VA, CL 5 NCT RATIO 200/5A,5P20 • MAGNETIZING CURRENT OF TRANSFORMER SHALL BE WITHIN 1% OF RATED CURRENT.  SHORT CIRCUIT LEVEL ON HV SIDE SHALL BE 4OKA FOR 3 SEC •TIME DURATTON TO WITHSTAND 3 PHASE SHORT CIRCUIT AT SECONDARY TERMINALS WITHOUT ANY INJURY -5 SECONDS • TRANSFORMER SHALL BE DESIGNED TO WITHSTAND 110% OVERFLUXING CORRESPONDING TO RATED VOLTAGE. •TRANSEORMER SHALL BE CAPABLE OF DELIVERING RATED CURRENT AT APPLIED VOLTAGE UPTO 105% OF RATED VOLTAGE WITHOUT EXEEDING THE TEMPERATURE LIMIT. •SHORT CIRCUIT WITHSTAND CAPACITY FOR THE BOLTED FAULT AT THE TERMINAL SHALL NOT BE LESS THAN 5 SECONDS WITH RESPECT TO FAULT LEVEL SPECIFIED FITTING AND ACCESSORIES : A) 3NOS. HIGH VOLTAGE GRADE TERMINAL BUSHING FOR 12KV GRADE. B) 3NOS. HIGH VOLTAGE GRADE TERMINAL BUSHING FOR 7.2KV GRADE. C)BIDIRECTIONAL ROLLERS TO BE PROVIDED FOR EASILY MOVEMENT OF TRANSFORMER. D) LIFTING LUGS EOR COMPLETE TRANSFORMER, RADIATOR AND TRANSEORMER TANK. E) EARTHING TERMINAL AND DETACHABLE RADIATORS. F) BUCHOLTZ RELAY, PRV AND MARSHALLING BOX, G) DIAL TYPE THERMOMETER FOR MEASURING OIL AND WINDING TEMPERATURE (MICRO SWITCH CONTACT TYPE) WITH EMBEDED PT 100 SENSOR AND CCU TO ALLOW 4 - 20 MA DC OUTPUT. H) SILICA GEL DEHYDRATING BREATHER. I) JACKING PADS WITH HAULING HOLES. J) LIFTING EYES EOR CORE AND WINDING. K) NAME PLATE AND CAUTION PLATES. L) ALL OTHER FITTING AND ACCESSORIES DEEMED NECESSARY EOR PROPER OPRATION AND PERFORMANCE OF THE TRANSEORMER ARE TO BE PROVIDED BY THE MANUFACTURERS. M) TRANSFORMER OIL SHOULD BE OF EHV GRADE CONFIRMING TO IS335 N) ALL PORCELAIN USED IN BUSHINGS SHALL BE HOMOGENOUS NON-PORUS UNIFORMLY GLAZED TO BROWN COLOR AND FREE FROM BLISTERS, BURNS AND OTHER DEFECTS. O) OIL GAUGE REQUIRED IN CONSERVATOR : MOG AND PRISMATIC BOTH P) TRANSFORMER MUST BE NIFPS COMPATIBLE WITH REQUIRED VALVES AND SPACE FOR TCIV O) MARSHALING BOX SHOULD BE WEATHER PROOF -MIN IP55 Total Quantity : 3

Sr No	CorrigendumDate	Corrigendum	CorrigendumType	NewSubmissionDate
1	08-11-2024			14-11-2024
2	22-11-2024			28-11-2024
3	22-11-2024			28-11-2024

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