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 Post subject: Time Current Curves of Circuit breakers
PostPosted: Thu Dec 13, 2012 6:48 am 

Joined: Mon Oct 08, 2012 2:59 am
Posts: 24
Location: India
[INDENT][SIZE=14px]Are all circuit breakers designed according to International/National Standards?[/size]
[SIZE=14px]I have to do an arc flash analysis. I have seen a Merlin Gerin compact NS1250 N in a plant. The latest version of ETAP library does not have the same listed. One of my friends says you can take an equal rated breaker from another manufacturer. He says that these breakers follow IEC 60947 and the time current curves will be matching for similar rated ones (circuit breakers). I am not sure about that statement. Please share your experience/views.[/size]
[SIZE=14px]Thank you in an advance.[/size][/INDENT]


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PostPosted: Thu Dec 13, 2012 8:29 am 
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Joined: Mon Jan 18, 2010 11:35 am
Posts: 523
Location: Wisconsin
Breaker trip curves are not interchangeable.

Check with ETAP. the Compact NS breaker has been 'on the market' for many years. For a long time it was a favorite of several generator manufacturers, so I am sure ETAP has had requests for it.


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