Monitoring relay CRRP1-28, CRRP3-28

• 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.