Motor Control:

Phase Monitoring Relays

AutomationDirect offers monitor relays for motor control:
    Phase Monitoring Relays for phase loss protection


ProSense™ Phase Monitoring Relays
provide protection against premature equipment failure caused by voltage faults on 3-Phase systems. All ProSense 3 phase monitor relays are designed to be compatible with typical Wye or Delta systems. Phase monitoring relays protect against single phasing regardless of any regenerative voltages.
  • PMRU Series phase monitoring relays provide protection against phase loss, phase reversal, phase unbalance, under voltage and overvoltage.

    • Universal voltage range of 208 to 480VAC, 3-phase systems; compatible with most Delta and Wye systems
    • Variety of user-selectable and adjustable settings for flexibility in 3-phase protection
    • Automatic or Manual Reset
    • Multi-Color LED indicates normal condition and provides fault indication to simplify troubleshooting
    • Compact plug-in case utilizing industry standard 8-pin octal socket
    • 10A SPDT output contacts

  • PMRR Series phase monitor relays provide protection against phase reversal.

    • Works with 208-480V 3-phase systems
    • LED indicates both normal and fault conditions
    • Compact plug-in case utilizing industry standard 8-pin octal socket
    • 10A SPDT output contacts

  • PMRRL Series phase monitor relays provide protection against phase loss, phase reversal and undervoltage.

    • Under voltage setting is adjustable from 75-95% of nominal
    • LED indicates both normal and fault conditions
    • Compact plug-in case utilizing industry standard 8-pin octal socket
    • 10A SPDT output contacts

  • Agency Approvals

    • cURus, File number E191059
    • UL Listed, File number E109466
    • CE , EN60947-1, EN60947-5-1 (PMRU Series Only)
    • RoHS

Overview Phase Monitor PDF
relay