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The design and lightning performance data of the Tennessee Valley Authorty's (TVA) 161-kv and 115-kv sys-tem over a period of 21 years, a general guide for emergency loading of lines, and an analysis of interruptions due to lightning over a 4-year period are shown in tabular form. Maps and illustrations show the transmission system with the isokeraunic levels 1 and various types of construction. Conclusions...
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