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RezaN
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Post subject: bolted fault current  Posted: Fri Jan 21, 2011 12:05 pm |
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Joined: Fri Aug 20, 2010 8:37 am
Posts: 9
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Can someone explain what bolted fault current is?
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wbd
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Post subject: Posted: Fri Jan 21, 2011 12:15 pm |
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Joined: Wed May 07, 2008 5:00 pm
Posts: 871
Location: Rutland, VT
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In a nutshell, it is a fault with zero resistance. Visualize taking 3 phases or phase to ground or line to line, etc and bolting the phases together. This will give you maximum fault current.
On the other hand a arcing fault current has the resistance of the arc in air which will reduce the amount of fault current.
In terms of magnitude a bolted fault will have the maximum amount of current and mechanical stresses.
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Barry Donovan, P.E.
www.workplacesafetysolutions.com
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RezaN
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Post subject: Posted: Sun Jan 23, 2011 7:45 am |
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Joined: Fri Aug 20, 2010 8:37 am
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Thank you.
I think Bolted is a phrase,isn't it?
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wbd
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Post subject: Posted: Mon Jan 24, 2011 6:13 am |
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Joined: Wed May 07, 2008 5:00 pm
Posts: 871
Location: Rutland, VT
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yes, it is a descriptive phrase. Would be interesting to find the origin of the phrase and first use.
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Barry Donovan, P.E.
www.workplacesafetysolutions.com
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RezaN
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Post subject: Posted: Tue Jan 25, 2011 3:43 pm |
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Joined: Fri Aug 20, 2010 8:37 am
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Because little relationship is between word meaning and use it.
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stevenal
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Post subject: Posted: Wed Jan 26, 2011 9:08 am |
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Joined: Tue Jan 13, 2009 5:00 pm
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Personal protective grounds "bolt" together the three phases and ground. If not removed prior to energization, you have a bolted fault.
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RezaN
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Post subject: Posted: Thu Jan 27, 2011 5:32 am |
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Joined: Fri Aug 20, 2010 8:37 am
Posts: 9
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Cambridge Dictionary Online: Bolted
Bolted was found in the Cambridge Advanced Learner's Dictionary at the entries listed below.
•bolt verb MOVE QUICKLY
•bolt verb EAT
•bolt verb LOCK
•bolt verb SCREW
•bolt down verb, at bolt (verb) EAT
•bolt sth on
•shut/close the stable/barn door after the horse has bolted
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jghrist
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Post subject: Posted: Thu Jan 27, 2011 6:29 am |
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Joined: Wed Jun 04, 2008 9:17 am
Posts: 428
Location: Spartanburg, South Carolina
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RezaN wrote: Cambridge Dictionary Online: Bolted
Bolted was found in the Cambridge Advanced Learner's Dictionary at the entries listed below.
•bolt verb MOVE QUICKLY
•bolt verb EAT
•bolt verb LOCK
•bolt verb SCREW
•bolt down verb, at bolt (verb) EAT
•bolt sth on
•shut/close the stable/barn door after the horse has bolted
So if you encounter a bolted fault, you're screwed! 
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RezaN
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Post subject: Posted: Thu Jan 27, 2011 1:28 pm |
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Joined: Fri Aug 20, 2010 8:37 am
Posts: 9
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Maybe , I told you that Bolted is a phrase and little relationship is between word meaning and use it.
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