Type FSL2 Residual current Circuit Breaker without over current protection conforms to the standards of GB 6916.1,IEC 61008,BS 4293 etc.It is used in the circuits of AC 50-60Hz.single phase 230V(220V),Three phases 400V(380V) in industrial & mining enterprises,Commercial buildings and housing fro protection of personal electric shock hazard and electric equipment and for unfrequent switchover of circuits under normal conditions.