Study of Failure Rates of Surge Arresters on Power Distribution Lines due to Direct Lightning Hits

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  • 配電線直撃雷に対する避雷器焼損率の検討
  • ハイデンセン チョクゲキ ライ ニ タイスル ヒライキ ショウソンリツ ノ ケ

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Lightning strokes with high energy sometimes occur on the Japan Sea Coast. In this area, not a few surge arresters on power distribution lines have been damaged by lightning. Therefore, it is very important to study the method to reduce the number of failure of surge arresters.<br> This paper describes the effect of lightning protection method on the failure rates of surge arresters on power distribution lines due to direct lightning hits. The analysis shows that: (1) the failure rates of surge arresters without an overhead ground wire are about 3_??_5 times larger than those with one, and (2) when surge arresters with higher withstand capabilities are adopted, it is effective to give priority to the installation of surge arresters at the open-termination of a line.

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