Voltage Sensor Relays

Dayton three phase monitoring relays continuously monitor voltage inputs of electrical equipment to protect them from damage due to phase loss, reversal & unbalance, and undervoltage & overvoltage faults. They can detect single phasing & continue to monitor even with a lost phase. The plug-in type octal connection provides easy and secure installation. Choose from a wide range of these Dayton 3 phase monitor relays, available in 90 percent nominal voltage and 80 to 95 percent nominal voltage drop out range on Raptor Supplies.

Macromatic's PMPU-FA8 3-phase line monitor is used in 190 to 500V three-phase systems to protect motors & equipment from 5 phase errors like phase loss, phase reversal, phase unbalance, undervoltage & overvoltage faults and rapid cycling. It can detect single-phasing & unbalanced voltages irrespective of regenerative voltages. This PMP Series voltage sensing relay continues functioning with a lost phase, unlike similar three-phase monitor relays for ease of troubleshooting.