Respectively through the various contacts, in order to dial the corresponding limit switches and overcurrentrelay normally closed contacts, to see the ability to cut off the control current.
①分别接通各个接触器，依次拨通相应的限位开关和过电流继电器常闭触头，查看其切断控制电流的能力。
2
WJJL1 intelligence overcurrentrelay is a typical electronic apparatus which has overcurrent, short circuit, over voltage, under curent, phase faults and starting failure protective functions.