Shiva Amvaj Monitoring Relay

Shiva Amvaj Monitoring Relay monitors the following functions on 3-phas supplies:

Under\over voltage
phase sequence
phase asymmetry
phase less


  • Accurate control over power grid due to lack of neutral utilizing (as neutral may occasionally contain electricity)
  • Protection:
    • Over/under voltage
    • Phase sequence and asymmetry
    • Phase less
  • Indicators:
    • AC: grid electricity
    • REL: relay status
    • F: over/under voltage and phase asymmetry
    • P: phase reversal
  • Adjustable asymmetry and on-delay parameters
  • No change in adjusted parameters due to contactor impacts

  • Supply voltage: 300-500 VAC/3PH/50-60 Hz
  • Disconnect at
    • Over voltage: 440V
    • Under voltage: 310V
    • Asymmetry: 7-25%
  • Delay
    • On delay: 2-240 sec
    • Off delay: 3 sec
    • Delay start (because of under voltage ): 10 sec
  • Operating conditions
    • Temperature: -20 to 65 o C
    • Humidity: 70%
  • Relay output: 5A

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