The residual current circuit-breaker can protect the safety of people and equipments, in the event that one gets an electric shock
or the electric leakages excesses a set amount, by cutting off the fault power within a very short time. Besides, the residual
current circuit-breaker can also be used to prevent the circuit and the motor from overloading and be used for infrequent line
conversion and infrequent starting of motor as well.