The RN-113 single-phase voltage monitoring relay. The RN-113 voltage monitoring relay is designed to de-energize an industrial/appliance single-phase 220V/50Hz load in case of inadmissible voltage variations in the mains with subsequent automatic re-energizing after the circuit parameters recovery.Load is connected to the relay either directly via relay terminals or through a magnetic starter, depending on the wattage. The relay can operate in fo..