AS


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Resistance of Earth Electrodes in Parallel

In previous articles Single Earth Electrode and Earthing Resistance Calculation, I have presented methods of calculating the earth resistance using IEEE or IEC methods. AS 1768 Appendix C recommends that the resultant earthing resistance may…


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Compliance to Statutory Laws

I was reminded of this article which I have written about two (2) years ago when I attended some product presentations about variable speed drives. What catch my attention most was the closing words of…



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IEC 60076-5 Transformer Impedances

IEC 60076-5:2000 Power transformers – Part 5: Ability to withstand short circuit recommends a minimum impedance for transformers. Unlike other standards such as the IEEE or AS which recommends typical values, IEC recommends minimum values….



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