... ,alternating contactor,rectification two-electrode valve,direct current contactor,time relay,discharge resistance,RK-SWB and so many other components. ... discharge resistor R,direct current contactorKM3.At the same time,dropping cocontactor KM2 closed,reverse voltage 200V come to ... electricity to adjust.Examinine the lifting and dropping . KT time relay still need to adjust if you find magnet can not ...