... 1:IGBT modules 2:save electricity 3:delivery fast Usage:preheat metal,heat treatment,forging,brazing,annealing WH-VI-230 metal heating machine with ... heating coils ModelWH-VI-230Working voltage range340V~420VMax input current350AMax input power230KWThe resonant frequency8KHz-15KHzContinuous load rate100%Cooling water pressure0.1 ... -saving 60% 20% saving compared with SCR-IF;3, Secure, reliable, ...