... phase & three phase SCR power regulator,thyristor power controller,SCR power regulator. single phase SCR power controller new version S9 series. ... ,15KW,22KW,28KW,33KW,39KW,44KW.Auxiliary power source: 220VACnput signal: 4~20mA,1~5VDC,2~10VDC,0~20mA ... when main circuit malfunctions.* Using European detachable control signal connector for easy replacement without re-wiring installation.* CE CERTIFICATION ...