Dear All,(adsbygoogle = window.adsbygoogle || []).push({});

I am new to this forum and I hope that I am going to be able to find a support from an expert in short-circuit current theoretically speaking or someone to assist me in general !

I am working everyday to an international standard IEC60439 (or the new IEC 61439) where it describe the prescriptions for testing LV equipment and especially short-circuit testing where I am seeking help. I have enclosed a document which is from a book where many formulas are explained but not devloped mathematically. It is based upon the standard IEC 60909.

It is only a 2-page document, please read it as my question will be related to this one.

I have demonstrated (after having sweat a lot!) the formula 8.11 OK.

But now I am trying to understand how the peak factor "k" is demonstrated (8.13b and 8.14) but also if the factor k the same as n expressed in the standard IEC 60439?

I do not consider it as homework but if it is, please accept my sincere apology and I will re-enter it in the other forum.

Thanks. PedroUK

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# Expertise on theoretical short-circuit current

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