Allen-Bradley 813S-V0B Line Voltage Monitor Relay

The Allen-Bradley 813S-V0B Line Voltage Monitor Relay is a solid-state, three-phase voltage supervision device designed for 480 V AC systems operating at 60 Hz. Catalog No.: 813S-v0B/813S-v0B, Bulletin 813S, Series B, specifies a line voltage of 480 V across three phases. This model is listed for use with lifts and control cabinets, making it a common choice for supervising incoming power in industrial control panels. Weighing approximately 660 g and manufactured in the United States, the unit is intended to fit standard panel layouts and integrate with typical Allen-Bradley control components. As part of the 813S voltage-relay family, the monitor provides continuous supervision of three-phase voltage, helping prevent improper operation or damage due to undervoltage conditions in 60 Hz facilities. This variant is specifically designed for 480 V three-phase service, aligning with many North American industrial power distributions and equipment configurations that require voltage presence monitoring within control circuits.