POPP Type B Residual Current Circuit Breaker (RCCB)(without overcurrent protection), suitable for rated voltage 240V at two poles, 415V at four poles, rated current n line 63A, when the person gets an electric shock or the grid leakage current exceeds the specified value, the residual current action circuit breaker can quickly cut off the fault power supply for protecting the safety of human body and electrical equipment can also be used for infrequent switching of circuits and infrequent starting of motors.