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
Main transformer Capacity (MVA)5,7.5,10,15,20,25,31.5Rating of HV sideSwitchgear (kV)33,66,77,110,132,138Rated current (A)1250,2000Rated short-circuit breaking current (kA)25,31.5,40Rating of LV sideS