Stand by & Back up in DG set

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murugesanmc Associate Join Date: Jul 2011 Posts: 28	Stand by & Back up in DG set 09/07/2011 11:28 PM
	Sir, Can anyone please tell me the difference between Stand by & Back up power in DG set.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: Stand by & Back up in DG set 09/08/2011 12:35 AM
	Tomayto, tomahto. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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Anonymous Poster #1	#2 In reply to #1 Re: Stand by & Back up in DG set 09/08/2011 1:29 AM
	That's the English translation of mutatis mutandis.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#3 In reply to #2 Re: Stand by & Back up in DG set 09/08/2011 1:35 AM
	Plus c'est la même chose. --Français François __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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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	#4 In reply to #1 Re: Stand by & Back up in DG set 09/08/2011 4:50 AM
	Potayto, potahto. "Let's call the whole thing off". __________________ "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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North of 60 Guru Join Date: Mar 2007 Location: Iqaluit, NU. Canada Posts: 1854 Good Answers: 140	#5 Re: Stand by & Back up in DG set 09/08/2011 8:49 AM
	There is no difference as both terms mean... A prime mover (the diesel engine) paired with an alternator (assuming the output is AC) designed to carry the load of the facility when the main power source is lost. __________________ Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
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cuba_pete Guru Join Date: Dec 2010 Posts: 1895 Good Answers: 44	#6 Re: Stand by & Back up in DG set 09/08/2011 2:44 PM
	I'll play Devil's advocate here: Could be that Stand-by is always on-line and holding the load and the Back-up would be another gen that can come on-line if the load increased within a certain percentage of maximum. We call this load-shedding, where two gennies come online automatically, then one is auto switched off for shedding (with proper alignment of the shedding selector). If the load increases to within 75% of the maximum for the loaded gennie (chillers and pumps kicking in, e.g.) then #2 comes online. #1 is the Stand-by, #2 is the Back-up.
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zamanengineer001 Associate Join Date: Sep 2011 Posts: 26	#7 Re: Stand by & Back up in DG set 09/24/2011 5:08 AM
	both same as I use......
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Anonymous Poster (1); cuba_pete (1); North of 60 (1); PWSlack (1); Tornado (2); zamanengineer001 (1)

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