Distribution transformers oil-immersed transformer single phase three phase tran
Type and Rating · Capacity range :50-50000KVA· Secondary voltage: 415V ,400V etc.· Frequency :50Hz ,60Hz· Type: Single phase ,three phase · No-load tap changer and on-load tap changer· ONAN and ONAF· Set-up and set-down type Standard: IEC60076-1, IEC60076-2, IEC60076-5, IEC60317, ANSI, IEEE, AS, etc.Conditions of serviceAltitude: Up to 1,000m above sea levelAmbient temperature: Max. +40℃Average (daily, Max.) +30℃Average (yearly, Max.) +20℃Min. -45℃Environment: OutdoorSpecial conditions:It may be consulted between manufacturer and customer.
Main technical datarated voltage 12kVrated frequency 50Hzrated lighting impulse voltageto earth 75kVbetween clearance 85kVrated 1 min power frequency withstand voltageto earth 42kVbetween clearance 48
Rated voltagekV40.5Lightning impulse withstand voltage(peak value)Phase to earth & phase to phasekV185Isolating distancekV2151minpower frequency withstand voltagePhase to earth, phase to phasekV95
Technical parameter:ItemUnitDataRated voltage (Max working voltage)kV12Rated insulation level1min power frequency withstand voltagekV42Lightningimpulse withstandvoltagekV75Rated frequencyHz50Main busb
H.V. unitRated voltagekV12Rated current of main bus-barA630Rated short-time withstand currentkA/s25/2Rated crest withstand currentkA63Rated short-time making currentkA63Breaking current of fuserkA31.5