Specifications:- Input Voltage : 380-440 Volts, 3-Phase 50Hz. AC supply Output Voltage : Fixed Rated maximum DC voltage or variable from zero to maximum rated voltage. Output Current : Rated maximum DC current Temperature Rise : Less then 35 C above ambient at the top of the oil. Efficiency :12V Rect-82%, 24V Rect-90% 100V Rect-94%, 200V Rect- 96%, More than 250V, Rect-More than 97% Ripple Content : Less than 5% Insulation : 'A' class for oil cooled.