... SCR power regulator,thyristor power controller,SCR power regulator. Three phase SCR power controller new version S9 series. zero cross ... ,2~10VDC,0~20Ma,0~5VDC,0~10VDC, dry contact points, etc. and all control signals are ready to use.* Triggering ... connector for easy replacement without re-wiring installation.* CE CERTIFICATION. Three phase SCR power regulator