FCL6 residual current operated circuit breaker without integral over current protection is suitable for circuit of AC50/60Hz,rated voltage 230V(2-pole) and 400V(4-pole),rated current .when a person touches the electricity or the leakage of power grid current exceeds specified value, it can out off the fault current rapidly in a ultra-short time for protecting the person and power device ,besides it also can be used for infrequent switching of circuit and infrequent starting or motor.this conform to standard IEC61008-1 and GB16916.1