Force calculation for faults on switchgear bus

[buckeyemurphy]

Is there a standard or typical formula to use to calculate forces on switchgear bus based on available fault current.

 

[Marmite]

There are lots of variables to consider in the design. See Chapter 4 of the ABB switchgear manual which is available for free download after you register.

http://www02.abb.com/global/seitp/s...9e7a3c1256f5d004a29bb/$file/index_abb_en.html

Regards
Marmite

 

[waross]

If you mean the Available Short Circuit Current as determined by the transformer impedance, the actual offset current and the resulting forces on the bus bars may be much higher.
You should be calculating the Asymmetric fault current and using that value in your calculations.

Bill
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