The RCW-3 relay is meant for monitoring tripping circuit continuity, and signalling of its lack. The relay can monitor the continuity in one, two or three tripping circuits of the power breakers. The relay has three independent, isolated input elements. Each element is equipped with: a LED indicating the state of the monitored circuit, independent contacts – made in case of lack of the circuit continuity or loss of the supply voltage, and a W/Z switch – turning on or off the input element. The relay is also equipped with a LED signalling power supply, and one make contact signalling lack of continuity of any of active circuits or loss of supply voltage.