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 …

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 …