... of single phase & three phase SCR power regulator,thyristor power controller,SCR power regulator. single phase SCR power controller new version S9 series. zero ... ,15KW,22KW,28KW,33KW,39KW,44KW.Auxiliary power source: 220VACnput signal: 4~20mA,1~5VDC,2~10VDC,0~20mA,0~5VDC,0~10VDC ... for hot (fan in the control panel)2.Make choice of purchase please cogitate power fluctuant rate and heater error or order ...