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Application
The relay type NA40 can be typically used in MV and LV networks:
- on ring and parallel feeders in solidly grounded, ungrounded, Petersen coil and/or resistance grounded systems,
- on the LV side of parallel connected transformers,
- on parallel connected generators on the same busbar .

Protective functions
59N - Residual overvoltage
67 - Directional overcurrent
67N - Directional ground fault
BF - Circuit breaker failure

 

 

 

 
   

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