Capacity of C.B.

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ASSER Commentator Join Date: Oct 2013 Posts: 72	Capacity of C.B. 11/02/2013 12:56 AM
	Dear sir How can we calculate the capacity of circuit breaker in MW.Please clarify this with an example Thanks
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: capacity of C.B. 11/02/2013 1:07 AM
	V A √3 cosφ / 1,000,000 __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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dvmdsc Guru Join Date: Mar 2010 Location: In the pool because it is too hot. Posts: 3054 Good Answers: 141	#2 In reply to #1 Re: capacity of C.B. 11/02/2013 6:44 AM
	I guess it depends how you look at it. The value mentioned by Tornado is that of the 3 breakers together. If they have a mark on each of them it should be probably divided by 3. It might be a language thing but "CAPACITY' of a breaker? Breakers normally have the load in AMPS (or in your case a fraction of MA( mega- amps) or a multiple of kA (kilo-amps) Breakers that size will most commonly be executed as (3)coupled singles. __________________ Plenty of room here
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 Re: Capacity of C.B. 11/03/2013 2:14 PM
	Easy. Phone the manufacturer's technical helpline with the model and serial number, and ask. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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The.Tinkerer Guru Join Date: Apr 2012 Posts: 732 Good Answers: 17	#4 Re: Capacity of C.B. 11/04/2013 1:33 PM
	I'm having a hard time getting over the OP's handle... __________________ common knowledge...less common than common sense
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richpress Participant Join Date: Oct 2016 Location: Retired but still looking, in Arazona Posts: 2	#5 In reply to #4 Re: Capacity of C.B. 10/23/2016 11:09 PM
	Me too. Long ago, we used to joke about using a 50-cent transistor to protect a $500 fuse, in an orbital vehicle, where field service can become problematic. __________________ The glass is not half empty, or half full - it is half-filled with water and half-filled with air - hence, fully filled on the whole!
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