Back-up protection in Air Circuit Breaker

Is there any LV Air Circuit Breaker  which offers short circuit protection inspite of defect in its built in microprocessor based protection release ?

Similar to "Reflex Tripping" in Compact NS Moulded Case Circuit Breaker of Schneider


asked 7/28/2012
Girish Ramanna3
Girish Ramanna

1 Answer

Girish,

I've previously asked Schneider if the reflex tripping of their Masterpact circuit breakers operates independently of the protection module and was told yes. You can refer this post: 

Low Voltage Circuit Breakers

If may be better if you ask them again to see if this is still the case.

For backup protection, I would also suggest you consider the next upstream breaker. I think this would give a more reliable installation.

answered 12/12/2012 Steven McFadyen 204
Steven McFadyen

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