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radha5520
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India - Member - New Member

Join Date: Feb 2011
Location: Bangalore
Posts: 7

Busbar Sizing.

06/22/2011 4:35 AM

I really confused in busbar sizing.In our Previous company for aluminum busbar sizing we are taken 0.8A/Sq.mm, Cu Bus sizing-1.2A/Sq.mm. How the 0.8A/Sq.mm/Al. 1.2A/Sq.mm/Cu come.Is there any Standard or Calculation is Available.
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TonyS
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United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#2

Re: Busbar Sizing.

06/22/2011 8:29 AM

Resistance of copper and aluminium!

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#3

Re: Busbar Sizing.

06/22/2011 9:38 AM

Sizing busbars on such "thumb rules" such as 0.8A/sq.mm for Aluminium and 1.2A / sq.mm for Copper is very unprofessional and crude. There is a scinetific method of calculation on bus bar sizing depending on the continuous current rating - duly applying all rating factors, the short time withstand rating and the short circuit force withstand.

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dhayanandhan
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Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#4

Re: Busbar Sizing.

08/01/2014 12:20 PM

Dear radha5520

Pl.find details here about Bus Bar Design. Hope your doubt is cleared.

http://cr4.globalspec.com/search/sitesearch?do=show&srchobjs=t%2Cc&order=asc&fs=12&sort=textmatchrank&srch=bus%20bar%20design

DHAYANANDHAN.S
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