Monitoring relay CRRP1-28, CRRP3-28

  • REVERSE POWER MONITORING RELAYS
  • THIS UNIT MONITORS A SINGLE- OR THREE-PHASE SUPPLY FOR REVERSE POWER AND TRIPS A RELAY IF IT DETECTS REVERSE POWER OVER A SET LIMIT.
  • THE RELAY OUTPUT IS TYPICALLY USED TO PREVENT “MOTORING” OF A GENERATOR (WHERE THE GENERATORS TURNS THE ENGINE), WHICH CAN DAMAGE ENGINE.
  • FRONT PANEL CONTROL ALLOW SELECTION OF TRIP LEVEL, NOMINAL OPERATING CURRENT AND TRIP DELAY. LEDS INDICATE POWER ON AND TRIP STATUS.
  • VERSIONS ARE AVAILABLE TO SUIT 3-PHASE 3-WIRE L-L (CRRP3-28) AND 3-PHASE 4-WIRE L-N (CRRP1-28) SYSTEMS.

• This unit monitors a single- or three-phase supply for reverse power
and trips a relay if it detects reverse power (I x cos Φ) over a set limit.
The relay output is typically used to prevent ‘motoring’ of a generator
(where the generator turns the engine), which can damage the engine.
• Front panel controls allow selection of trip level, nominal operating
current and trip delay. LEDs indicate power on and trip status.
• Versions are available to suit 3-phase 3-wire L-L (CRRP3-28) and 3-phase
4-wire L-N (CRRP1-28) systems.
• These instructions contain important safety information. Please read
them thoroughly before commissioning, operating or maintenance of
the unit.

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