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How does D65PLR480 Series, Phase Loss and Reversal relay works

Three phase monitoring relays continuously monitor all voltages of a three-phase system. They are used to protect motors and equipment from expensive damage due to phase loss and phase reversal.

These relays incorporates microprocessor based design capable of advanced signal processing including true RMS voltage measurement. innovation analog to digital sensing circuitry allows for true full wave monitoring of all three phase.

when Proper three -phase line voltage is applied to the unit and the phase sequence (rotation) is correct ,the relay is energized.

A phase loss or phase reversal condition will de-energize the relay after a time delay. Re-energization is automatic upon correction of the fault condition. A bi-color LED indicates normal condition and also provides specific fault indication to simplify troubleshooting.