We are offering residual circuit breaker, elcb. rating - 25 amp, 40 amp & 63 ampavailable in 2 pole and 4 pole.Sensitivity 30 ma, 100ma, 300 ma, 500 ma.Gives protection against electric shocks due to earth leakage currentthe residual current device incorporates a core balance current transformer with a special high permeability magnetic core and primary winding of teflon coated flexible copper braids. Conforms to is iec 12640. Isi marking