kA Rating of Bus Bar More Than 50kA - CR4 Discussion Thread

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Anonymous Poster	kA Rating of Bus Bar More Than 50kA 05/31/2010 12:27 AM
	if we copper considering bus bar with dencity 1.6per sqmm then it withstand 50ka as per standerd if we rquired 70ka then what may me be the disity Vijay
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ieshiv Associate Join Date: May 2009 Posts: 40 Good Answers: 1	#1 Re: ka rating of bus bar more then 50ka 05/31/2010 2:53 AM
	(I/A)²*t =.0297log( t2+234/t1+234) I is short circuit current in amp A is conductor area in circular mills t is the time of short circuit in second t1 is operating temperature t2 is max short circuit temperature hope this will help
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Anonymous Poster	#2 In reply to #1 Re: ka rating of bus bar more then 50ka 05/31/2010 8:53 AM
	If the conductor area in mm2, this formula will work?...please help me
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ieshiv Associate Join Date: May 2009 Posts: 40 Good Answers: 1	#3 In reply to #2 Re: ka rating of bus bar more then 50ka 05/31/2010 10:37 PM
	change mm² ^{_{into circular mills and use this formula ,if you still find problem than feel free to ask me...........}}
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