3-phase asymmetry, phase-sequence, phase-loss relay

Monitors voltage asymmetry, phase sequence and phase loss for 3-phase 3-wire or 4-wire power supplies, in one unit.


  • Worldwide power specifications supported by one unit
  • Phase sequence, phase loss: operation reaction time 0.1s maximum
  • Asymmetry: operation time setting from 0.1 to 30s
  • Reset method: automatic
  • Power ON lock: 1s or 5s

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