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DEIF's phase sequence meters are applied to check and indicate correct and incorrect connection of the phases plus phase breakage of a shore connection.

A check of the phase sequence is required for connecting equipment to a new voltage source, e.g. when changing from the mains supply of a vessel to the mains at harbour.

The indicator can also be applied for alarm indication on phase breakage.



  • Sequence read
  • 380 to 440 V AC, 45 to 65 Hz


  • Sequence check (relay)
  • 230 or 400 V AC, 47 to 63 Hz
  • Sequence check (relay) 
  • 230 or 400 V AC, 47 to 63 Hz
  • Continuous operation
  • Clear indication of incorrect connection
  • Clear indication of phase breakage
  • DIN standard size: Q96