ORION Voltage Protection Relay (VPR-A)

ORION  Voltage – Frequency Monitoring & Protection Relay

The voltage protection relay VPR-A has been designed to measure the line or phase RMS voltage, frequency and unbalance under normal condition or under disturbances. This information is internally processed by the microprocessor, to take the voltage protection actions defined under ANSI or IEC standards. The different functions provided by the VPR-A may be classified into the following groups:

APPLICATIONS
◐ Protection of generators, motors and transformer against adverse system voltage conditions
◐ Ground fault detection 59N.
◐ Supervision of automatic transfer switching schemes.

PROTECTION AND FUNCTIONALITY
◐ (27t/27i) Timed and instantaneous undervoltage
◐ (27r) Residual undervoltage
◐ (46) Voltage unbalance
◐ (47) Phase reversal
◐ (59t/59i) Timed and instantaneous overvoltage
◐ (59N) Homopolar voltage
◐ (81) Underfrequency and Overfrequency
◐ Five output relay programmable
◐ Control power drop or internal fault relay

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