The earth leakage circuit breakers (RCB) NFIN is in conformity with the standards of VDE 0664,CCE27 and BS 4293. It can cut off the fault circuit immediately on the occasion of shock hazard or earth leakage of trunk line. Thus it is suitable to avoid the shock hazard and fire caused by earth leakage. NFIN RCB is mainly suitable for using in variety of plants, enterprises, buildings, constructions, commerce, guesthouses and families. It can be used in circuit up to single phase 240V,three phase 415V,50Hz or 60Hz.