Monitoring relay VRBU3, VRBU3N

Phase balance and undervoltage monitoring relays

DESCRIPTION

  • This unit monitors a 3-phase supply for phase imbalance, low or missing phases or incorrect phase sequence and trips a relay if it detects any anomaly.
  • Versions are available to suit 3-wire, 3ph (VRBU3) and 4-wire, 3ph+N (VRBU3N) supplies of 110 V, 210 V and 430 nominal.
  • A front panel control allows selection of minimum voltage level. 
  • LEDs indicate power on and trip status.

TECHNICAL PARAMETERS

  • Operating frequency: 45-65 Hz.
  • Trip delay: Adjustable 0,5 - 10s.
  • Trip reset delay: Fixed at 0,5s.

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Customer Centre

Reception

+420 800 100 671
elko@elkoep.com

Technical support

+420 573 514 242
support@elkoep.com