MakeVTRCapacity. 500 AMPS DCInput Voltage. 440V three PhaseOutput Voltage 12 DC VNo. of Phases3-phaseFrequency.50/60Hz Input Current Capacity 30amps for 1 phase Output Current Capacity 500 amps DCMode of OperationManuallType of Cooling.Forced AIR cooled withu boxCopper.Electrolytic Grade.ApplicationIndoor TypeOutput Accuracy± 1% from No load to full load.Response TimeInstantaneous (milisec.)Wave Form DistortionVirtually Nil.Efficiencymore than 99%Losses at No Load 0.5% of the total capacityLosses at Full load 0.8% at full load.Metering3 Digital Display for AC voltage & D C Voltage monitoring