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Overhead line fault rating

Overhead line fault rating

Overhead line fault rating

(OP)
I live in the IEC world (Australia) and am looking for the formula required to calculate the short-circuit current rating of an overhead line (ACSR) conductor please.

Anyone know where I can find this formula? Is there a standard or something that deals with it?

Thanks.

RE: Overhead line fault rating

I know nothing of Australian standards, but in the ANSI/IEEE world there is no specific rating, but rather there is a withstand rating for the conductor, an I^2*t value; the faster you clear the fault the higher the current that can be carried before there is conductor damage.

RE: Overhead line fault rating

The formulae and detailed calculation examples including for ACSR are given in Brian Wareing's book Wood Pole Overhead Lines, ISBN 0863413560. Section 8.7.6 Pages 136-140.

Regards
Marmite

RE: Overhead line fault rating

(OP)
Marmite

Excellent! Exactly what I was looking for and the book is a free download as well.

Many thanks.

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