The CRN-1 relay detects reverse power flow into ac generators. Its use is recommended in cases where the connected system has sufficient capacity to "motor" the generator upon loss of input to the prime mover (steam turbine, hydraulic turbine, or diesel engine). The protection afforded is primarily for the prime mover, rather than for the generator.
The CRN-1 relay provides three phase protection for reverse magnetization of power transformers when utility tie is interrupted.
Why ABB?
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Long production life, ease of application and reliable protection
- High quality design
- 12 year warranty
- Short lead times
- Consistent on-time delivery
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24/7 customer support