Sheet1GUARANTEED TECHNICAL PARTICULARSSl. No.Particulars1 MVA, 6.6/.725 KVVOLTAMPKIRLOSKAR Specification IS 2026,IS 2026,Part I 1977Part I 1977Part II - 1977Part II - 1977Part III 1981Part III 1981Part IV 1977Part IV 1977IS11171-1985IS11171-1985 Type Three phase, core type, cast resin dry typeThree phase, core type, cast resin dry typeApplicationInput transformer to VFD for Motor Input transformer to VFD for Motor 1Duty Indoor, installed in roomIndoor, installed in room2Degree of Protection of EnclosureIP 42IP 233Voltage HV/LV 6.6 / 0.725 kV6.6 / 0.725 kV4Frequency 50 Hz50 Hz5No. of phase 336Continuous rating 1000/500-500 KVA1000/500-500 KVA7ConductorCopperCopper8Insulation class Class H or BetterClass H or Better9Cooling Air NaturalAir Natural10Winding connectionDelta / StarDelta / Star11Vector group Dyn11d0Dyn11d012Neutral grounding Effectively earthedEffectively earthed13System earthing HV-UnearthedHV-UnearthedLV-Effectively earthedLV-Effectively earthed14Percentage impedance6.25%6.25%15TerminationHV- Cable end box suitable for termination of XLPE aluminium cables, with air insulated disconnecting chamberHV- Cable end box suitable for termination of XLPE aluminium cables, with air insulated disconnecting chamberLV- Cable end box suitable for termination of XLPE aluminium cables, with air insulated disconnecting chamberLV- Cable end box suitable for termination of XLPE aluminium cables, with air insulated disconnecting chamber16 Temperature rise over 50C ambient tempa) In winding (measured by Resistance method)90C90Cb) Core and other adjacent parts of winding90C90Cc) Core and other parts not adjacent of windingsWithin safe limit of core and adjacent materialsWithin safe limit of core and adjacent materials17Bushing mounted CTsCT in LV Neutral bushing for standby E/F protectionRatio : 500/5 A Class : 10P15Ratio : 500/5 A Class : 10P15

18Tap changerOCTCOCTCa)Range 5%5%b) Total tap positions 55c) Taps above nominal voltage22d) Taps below nominal voltage22e) Voltage per step variation2.50%2.50%f) Tap change controls ManualManual19Impulse test withstand voltage As per IS 2026, Part III 1981As per IS 2026, Part III 1981Apower frequency voltage withstanda) primaryb) Secondarya) 20 KV b) 3 KVa) 20 KV b) 3 KVBInduced over voltage withstanda) primaryb) SecondaryShall withstand double voltage & double frequency for 60 Secs.Shall withstand double voltage & double frequency for 60 Secs.CFull wave lighting impulse withstand voltagea) primaryb) Secondarya) 60 KVp b) N/Aa) 60 KVp b) N/ADShort circuit withstand capacity at Terminala) For 1 secb) For 3 sec c) For 5 sec40 ka for 3 Seconds 40 ka for 3 Seconds 20Short circuit level on HV side40 kA for 3 Seconds40 kA for 3 Seconds21Short circuit level on LV side50 kA for 3 Sec50 kA for 3 Sec22Auxiliary supply voltage240 AC240 AC23Parallel operation Suitable for parallel operation with transformers of similar ratingsSuitable for parallel operation with transformers of similar ratings24Overload capacity As per IS 6600 1972As per IS 6600 197225Magnetizing current0.3% of rated current0.3% of rated current26Paint Epoxy Epoxy27Paint shadeShade 632 as per IS 5Shade 632 as per IS 528Current Density2.5 A/mm2 Max2.5 A/mm2 Max29Mandatory SparesBidder to IncludeBidder to Include30Special tools & tackles & commissioning sparesBidder to IncludeBidder to Include31Current rating - Primary/Secondary (amp)87.48 Amps. At HV side & 398.17 in LV1 & 398.17 in LV 287.48 Amps. At HV side & 398.17 in LV1 & 398.17 in LV 232Separate Neutral Bushing terminal for earthingRequiredRequired33Neutral terminal to be brought down to accessiblelevelRequiredRequired34Regulation at full load and at 75degCa) At UPFb) At 0.8 PFa) 1.131 b) 4.555a) 1.120 b) 3.79435Loss & Efficiency36No load lossa) At 100% voltageb) At 110%voltagea) 2.2 KW ( Sub IS Tol ) b) 3.3 KW ( Approx ) a) 2 KW ( Sub IS Tol ) b) 2.2 KW ( Approx ) 37Excitation loss at flux density 1.7 Wb/Sqm1.0 watt/kg1.0 watt/kg38Load loss at 75 degCa) At full loadb) At half loada) 9.4 KW ( Sub to IS Tol ) b) 2.35 KW ( Sub to IS Tol a) 10 KW ( Sub to IS Tol ) b) 2.4 KW ( Sub to IS Tol 39Efficiency at 75degC for UPF ata) full loadb) 3/4 th loadc) 1/2 loada) 98.853 b) 99.012 c) 99.098a) 98.814 b) 98.994 c) 98.10840Efficiency at 75degC for 0.8lag PF ata) full loadb) 3/4th loadc) 1/2 loada) 98.571 b) 98.767 c) 98.875a) 98.522 b) 98.745 c) 98.88841Max efficiency99.09999.11442Load at which max. efficiency occurs48%45%43Material & Type44Core material /gradeCRGO Silicon Steel CRGO Silicon Steel 45Flux density at rated voltage & at normal tap1.7 Tesla1.65 Tesla46Flux density at 110% rated voltage at normal tapBidder to specifyBidder to specify47Winding Conductor materialElectrolytic Annealed Copper conductorElectrolytic Annealed Copper conductor48Insulating Material49Between TurnsFiber GlassFiber Glass50Between Core & windingExpoxy + AirCASTING MATERIAL51Between WindingExpoxy + AirCASTING MATERIAL52Of core laminationsCarliteCarlite53Bushing54MakeBidder to SpecifyBidder to Specify55Bushing Type / Voltage rating / rated currenta) primaryb) Secondarya) 12 KV, 250 Amps, b) 1KV, 1000 Amps. a) 12 KV, 250 Amps, b) 1KV, 1000 Amps. 56Bushing insulation level (KV) :a) Impulse withstand HV/LV bushingb) Dry withstand HV/LV bushingc) wet withsatnd HV/LV bushingd) Flashover withstand HV/LV bushingsIEC standard ( 1.5 x Full wave)IEC standard ( 1.5 x Full wave)57Total creepage distance of HV/LV bushings25 mm/KV25 mm/KV58Arcing Horn gapBidder to specify Bidder to specify 59Current Transformer60CT make for REF/Earth fault protectionBidder to specify Bidder to specify 61CT type/Qty/Ratio/Burden/Accuracyto be decided during detail engg.to be decided during detail engg.62Fitting & accessories(Transformer protection relay)Bidder to Include as per specificationBidder to Include as per specification63Power Cable Box Included witha) weather protectionb) Door lock Switchc) Space heater & illumination lampd) Space terminals in case of control terminalse) GlandsBidder to specify Bidder to specify 64Marshalling / Control box Included witha) weather protectionb) Door lock Switchc) Space heater & illumination lampd) Space terminals in case of control terminalse) GlandsBidder to specify Bidder to specify 65weight & dimensionsi)Weight ofa) Coreb) Windingc) Overall WeightCore & Winding- 3010 Kgs. Over all weight :- 3850 Kgs.Core & Winding- 3200 Kgs. Over all weight :- 4200 Kgs.iii)Minimum clear height required to lift core & WindingBidder to Include mmBidder to Include mm44Tests to be performedBidder to Includei)Type testsa) heat run test b) Impulse testc) Vacum test

RequiredNot RequiredRequired(for one transformer of identical rating)ok notedii)Routine TestsAll routine test as PER IS 2026 shall be conducted at our unit.ok noted45GA DrawingBidder to IncludeBidder to Include46QAPBidder to IncludeBidder to Include47Approximate Overall dimension (in mm)aOverall Length2550 mm ( Approx )2400 mm ( Approx )bOverall breadth2550 mm ( Approx )2775 mm ( Approx )cOverall Height2375 mm ( Approx )2525 mm ( Approx )48Approximate Weight of Heaviest package (KG)3850 Kgs ( Approx )4200 Kgs ( Approx )49Approximate transport dimensions of largest package LxBxH (mm)( 2550x2550x2375 ) mm - Approx( 2400x2775x2525 ) mm - Approx50Fitting & Accessories as per specificationYESok noted51Reference standardIS 2026/11171IS 2026/1117152Schedule of components & Accessories indicating ratings,types,makes etc.Bidder to IncludeBidder to Include53Compliance with Technical Specification and Technical Procurement SpecificationBidder to IncludeBidder to Include