Rectifier control equipment 1.Three wires,two-phases and half-wave rectifying mode 2.Simplicity on the circuit ... ,alternating contactor,rectification two-electrode valve,direct current contactor,time relay,discharge resistance,RK-SWB and so many other components.Enclosure ... electricity to adjust.Examinine the lifting and dropping . KT time relay still need to adjust if you find magnet can not ...