Voltage And Frequency Relays For Single Phase Systems, Manufacturer, Supplier, Exporter, Proton Power Control, Pune, Maharashtra, India

Voltage Frequency Relay MODEL: VFR 1P-PR-15

The voltage-frequency-relay 1P(Single Phase) monitors voltage and frequency in one Phase networks with neutral and switches off rapidly when required.
For safe running of electrical devices, special protections that keep a continuous watch on supply conditions are very essentials.
'PROTONs VFR 1P' offer following protections along with 3 digit display showing R-N(L-N) voltage and frequency in scanning mode with precise accuracy. LOW/HIGH voltage and frequency(settable) tripping to ensure trouble free running of Loads.

  • Supply voltage:230 VAC, 50 Hz (P & N) (No auxiliary supply)
  • Output Contacts: Two SPDT (C-N/O-N/C) Relay, Rating 5A at 250V AC
  • Keys:
    1) SET: SET key, Press to enter into SET Mode
    2) INC: Upward Arrow key, Press to Increment the setpoint.
    3) DEC: Downward Arrow key, To Decrement the setpoint.
  • Operating Temperature range: 5 C to 60 C.
  • Relative Humidity: 10 to 95% RH
  • Mounting: Din Rail Mounting.
  • Base mounting dimensions: 55 (W) x 65 (H) x 125 (D) mm.


  • Micro controller based technology.
  • Protection against under voltage, Over voltage, Over Frequency and Under Frequency.
  • All set points settable by keys.
  • Trip Delay for voltage & Frequency is settable
  • Reverse Phasing Protection can be bypass through settings.
  • Indications Voltage relay, Freq relay ON.
  • Message display for Under/Over Voltage & Under\Over Freq Faults.
  • No separate auxiliary supply required.

  • N/A

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