大電流繰り返し印加によるZnO素子の動作特性と限界性能把握

概要

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As a lightning measure, excellent ZnO element has been applied to the transmission and distribution system in Japan. In this paper, to understand the limit performance of the arrester being used now, the lightning impulse current was repeatedly impressed to the zinc oxide arrester for 6.6kV. And, the performance characteristic of the ZnO element of the element in the arrester was measured. When the lightning impulse current of 4/10μs and 30 kAs was impressed to a gap type arrester, stripe destruction signs were confirmed on ZnO element surface. However, the main body of the arrester was not destroyed. Moreover, to understand the limit performance of a present arrester, the AC 2kA of power frequency superposition examination was executed. As a result, the arrester operated up to about 5.5kA of lightning impulse current.
宮崎大学の論文
2007-08-30