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This paper and companion papers discuss the surge voltage investigation on six power systems in the lightning season of 1927. Valuable data have been secured as to the nature and polarity, magnitude, wave-front and attenuation of surges, also the effect of overhead ground wires, choke coils, and lightning arresters. Especially interesting is the attenuation formula A = k e2, the form of which indicates a close connection between attenuation and corona loss. Further investigations are being carried on in the present year to secure more complete and exact data on wave shape and attenuation, effect of ground wires, lightning arresters, and choke coils.
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W. W. Lewis (1928) studied this question.
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