Development of advanced arresters for GIS from 66 kV up to 500 kV

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  • 66～500kV新形避雷器の開発
  • 66 500kV シンガタ ヒライキ ノ カイハツ

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Abstract

New zinc-oxide elements with a varistor voltage about twice that of conventional ones have been developed by reducing the ZnO grain size with a new additive, which enable to halve the series number of elements in metal oxide surge arresters. The advanced arresters with these elements for GIS are compact by 40 to 60 % in volume compared with conventional ones.<br> These advanced MOAs increase the flexibility in positioning MOAs and optimizing the GIS layout. This paper describes the performance of the new elements, the specification and construction of the advanced MOAs and the results of typical evaluation tests.

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