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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: 668
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: 668
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.
â˘bolt verb MOVE QUICKLY
â˘bolt verb EAT
â˘bolt verb LOCK
â˘bolt verb SCREW
â˘bolt down verb, at bolt (verb) EAT
â˘bolt sth on
â˘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: 409
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.
â˘bolt verb MOVE QUICKLY
â˘bolt verb EAT
â˘bolt verb LOCK
â˘bolt verb SCREW
â˘bolt down verb, at bolt (verb) EAT
â˘bolt sth on
â˘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
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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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