Shiva Amvaj Super Monitoring Relay

Shiva Amvaj Super Monitoring Relay protects the power system against over/under voltage, phase asymmetry, or phase reversal. Each disruption has its dedicated indicator.


  • No use of neutral enables accurate monitoring of the power system (occasionally neutral may be electrified)
  • Protection:
    • Over/under voltage
    • Phase asymmetry and phase reversal
    • Phase interrupts
  • Indicators:
    • U: grid electricity
    • ON: relay connect
    • ΔU: phase asymmetry
    • >U: over voltage
    • <U: under voltage
    • P: phase reversal
  • Adjustable asymmetry and delay parameters
  • No change in parameters due to panel contactor impacts

  • supply/input voltage: 300-500 VAC/3PH/50-60 Hz
  • Disconnect at
    • Over voltage: 400-480V
    • Under voltage: 300-380V
    • Asymmetry: 7-25%
  • Delay
    • Connect: 2-240 sec
    • Disconnect: 0-10 sec
    • Disconnection for under voltage at the start: 5 sec + disconnect delay
  • Operating conditions
    • Temperature: -20 to 65 oC
    • Humidity: 70%
  • Output: two 5A relays

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