Performance of polymer composite insulator and 154 kV insulation arm under polluted conditions

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  • 高分子がいしならびに同がいしを適用した154kV用絶縁アームの汚損絶縁特性
  • コウブンシ ガイシ ナラビニ ドウ ガイシ オ テキヨウシタ 154kVヨウ

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Abstract

This paper describes the insulation characteristics under polluted conditions for a polyme composite insulator and a 154 kV insulation arm composed of the insulators.<br> The equivalent salt deposit density (ESDD) on the housing of the polymer composite insulator wa almost the same level as that of the long rod type porcelain insulator subjected to a coastal exposur test for about 8 years. However, the surface leakage currents of the housing were smaller tha, those of the porcelain insulator, due to the restoring of water repellency on the surface of th housing. The withstand voltage of the 154 kV insulation arm obtained by a clean fog method in an, ESDD range from 0.03 to 0.5 mg/cm2 was about 15% higher than that of a long rod type porcelai:i insulator, but was about 15% lower than that of a polymer composite insulator, due to the structur with plural units connected in parallel.

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