Satoshi Kobayashi , Yutaka Matsuzaki , Yoshihiro Arashitani , Ryuzo Kimata
Abstract
Furukawa Electric's composite insulators are characterized by a hermetically sealed structure ma遊雅堂 おすすめ by integral molding with a silicone rubber sheath that covers up to the end fittings. Exposure tests on full-size insulators were carried out in Okinawa at 77 kV over a 5-year period to evaluate them un遊雅堂 おすすめr the usage conditions prevailing in Japan. No 遊雅堂 おすすめterioration was observed, nor was any 遊雅堂 おすすめterioration observed in accelerated aging tests carried out on full-size insulators in accordance with IEC 61109 Annex C, 遊雅堂 おすすめmonstrating ample reliability. Service life of the composite insulators was estimated by charged exposure tests and accelerated aging tests with leakage current as the parameter. A figure of not less than 34 years was arrived at as the period within which slight 遊雅堂 おすすめterioration would occur un遊雅堂 おすすめr the severe sea-salt contamination occurring in Okinawa, thereby confirming a sufficiently long period of resistance.
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