T&D World Magazine
Eskom Holdings SOC Ltd University of the Witwatersrand lightning

Lightning Tamed

Eskom analyzes and tests the usefulness of significantly reducing basic insulation levels and the effect on system lightning performance.  

Lightning is one of the major causes of poor performance by medium-voltage overhead lines in distribution networks. On some Eskom medium-voltage networks, for example, up to 78% of equipment failures are the result of lightning activity. Wood-pole splitting and pole-top fires can cause long, frustrating outages and dangerous low-hanging conductors. On medium-voltage overhead line feeders in South Africa, the insulation-to-earth typicall

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