The arc types that make the relay contact dynamic welding occur were introduced. It was pointed out that the closing short arc is direct reason of dynamic welding.
介绍了造成继电器触点动熔焊的电弧类型,指出闭合短电弧是动熔焊的直接原因。
The check is in the series of coil and four-way reversing valve control relay contact resistance increases, the bad, the contacts the voltage reduced.
经查是与四通阀线圈串联的控制继电器触点接触不良,电阻增大,致使电压降低。
Use relays, contactor, button, air switch and travel switch etc low-voltage constitute control circuit called relay contact control circuit.