…If the lightning current is large or the current waveform rises steeply, the potential of the tower or overhead ground wire may rise, causing a flashover between the insulator or the overhead ground wire and the conductor. This is called a reverse flashover, as it occurs because the potential on the tower or overhead ground wire, which should be at earth potential, becomes high. Lightning-resistant designs for transmission lines are made to keep the number of reverse flashovers within an appropriate range. … *Some of the terminology that refers to "reverse flashover" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このとき雷撃電流が大きかったり電流波形の立ち上り峻度が大きいと,鉄塔部分や架空地線の電位が上昇して碍子や架空地線と導体間がフラッシオーバーすることがある。本来大地電位であるべき鉄塔や架空地線側の電位が高くなるために生ずるので,これを逆フラッシオーバーと呼ぶ。逆フラッシオーバーの回数を適切な値に納めるように送電線路の耐雷設計が行われる。… ※「逆フラッシオーバー」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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