Monitoring relay VRO3N-28

Over voltage monitoring relays

DESCRIPTION

  • These units monitor a 3-phase 4-wire supply and operate relasy if a phase-neutral votage goes below set level.
  • LEDs indicate power on and trip status. A relay with two changeovars volt-free contact is fitted.
  • Front panel controls allow selection of:
    • Under voltage trip levels.
    • Nominal rated voltage.
    • Differential voltage for operating hysteresis and time delay before a trip triggers a relay response.

TECHNICAL PARAMETERS

  • Operating frequency: 45-65 Hz.
  • Auxiliary supply voltage: 24 V - 240 V AC/DC.
  • Trip time delay: Adjustable 0,5 - 10s.
  • Relay contacts: 2x changeover volt-free.
  • Dimension: 90 x 52 x 64 mm.
  • Protection: IP40 (front panel) IP20 (terminals).

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Customer Centre

Reception

+420 800 100 671
elko@elkoep.com

Technical support

+420 573 514 242
support@elkoep.com