Delab - Earth leakage relay is a micro-processor based electron ic protection device designed to recognize low-level leakage or unbalanced current, due to insulation loss on conductor or faulty equipment installed in the network. It incorporates a real time continuous display of the earth leakage current value in the true RMS ampere and allows the isolation of the faulty network or equipment if necessary. A ring-type zero current transformer is used to detect and provide the continuous measurement of the leakage current. It comes equipped with full auto reset function. It includes settable lockout reset counter, auto-reset timer, trip counter reset timer, lockout reset timer and trip count information. Trip contacxt K2 can also be programmable to activate Z.C.T. error or lockout signalling other than the normal latching trip, non latching trip and fall safe trip.