Estimation of flashover rates of overhead power distribution lines by lightning strokes to nearby ground

A method is proposed for calculating the flashover of an overhead power distribution line caused by lightning strokes to nearby ground. The results are presented in the form of a graph of flashover rate vs. BIL (basic impulse insulation level) for a 10 m high line and ground flash density of 10/km/sup 2//year. Flashover rates of lines of different heights and ground flash densities can be estimated from this graph.<
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