GU90 electronic instrument that supervises the sequence of a 3 phase power line.

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Further information

The LEDs on the front point out:

  • Red led: relay ON.
  • Yellow led: supply voltage connected.

If one or more phases disappear, the relay turns off. It is available with function F.33.

gu90

Key benefits

  • Supply voltage 3x215/455 Vac 50/60Hz