Abstract
Air pollution is a recognized factor in power transmission line failures in South Africa, causing insulator flashovers which lead to power dips. A number of management strategies are in operation to try to overcome the problem. A severe faulting episode which occurrence of three major contributing factors. paper. It is concluded that the episode resulted from the concurrence of three major contributing factors. These were the presence of an atmospheric circulation with high air pollution potential, the occurrence of runaway forest, veld and cane fires and a long period of below average rainfall prior to the event. The slow buildup of salt and industrial pollution during winter, the likelihood of dew formation which wetted the insulator surface making it conductive, and the rapid buildup of carbonaceous material all contributed to the faulting episode.
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