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Generalized curves for estimating lightning performance of ehv lines are presented. The curves are based on typical vertical and horizontal configurations for voltages ranging from 115 to 700 kV, covering the practical range of insulators, spans and footing resistances. The combination of insulators and footing resistances for the desired performance can be determined from the curves. Examples are given to illustrate the use of the curves in designing lines.
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Clayton et al. (1964) studied this question.
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