Phase monitor relays

Phase Monitor Relays are sometimes called 3 Phase Monitors, Three Phase Monitor Relays, Phase Loss Relays, Single Phase Relays, Phase Sequence Relays, Protective Relays, Motor Protection Relays or Phase Failure Relays. They provide motor protection against premature equipment failure caused by voltage faults on 3 Phase systems. These devices are designed to be compatible with most Wye or Delta systems. In Wye systems, a connection to a neutral is not required. Phase Monitor Relays protect against unbalanced voltages or single phasing regardless of any regenerative voltages.