The RCCB is suitable to the circuit of AC 50/60Hz.rated voltage 230V for 2 poles and 400V for 4 poles, and rated current up to 63A. when people come across the electric shock or the leakage current of the electrical network exceeds the fixed value, the product can cut off the fault current in short period so as to protect person and the equipments, It also can be used in the infrequent starting of the circuit and motors.The circuit breaker is suitable to industry commerce,high-rise building, household and other dinds of places. This product meets the standard of IEC/EN61008-1.