Voltage Sensing Relays and Monitors: Type - Voltage Monitor; Operation - Electromechanical; Phase - 3-Phase; Detection - Phase Sequence; Line Voltage - 220V AC; Frequency - 60 Hz; Contact Configuration - SPDT; Contact Rating - 10A @ 250V; Mounting - DIN Rail; Additional Information - Operating Temperature: -10 to 60 deg C (-14 to 140 deg F); Manufacturer Series - WRS