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RN 9877

  • Measuring range: 3 AC 175 … 525 V / 100 … 300 V
  • Monitoring
    • over- and undervoltage
    • voltage range excess
    • asymmetry
    • phase failure
    • phase sequence
    • missing neutral e.g. broken neutral wire
  • With or without neutral
  • No separate auxiliary necessary
  • Output: 1 changeover contact
  • De-energized on trip
  • Adjustable hysteresis for reset
  • Adjustable switching delay

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