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ELECTROLYTIC CORROSION OF METAL HARDWARE OF HVDC LINE AND STATION INSULATORS

, , , , , and . IEEE Transactions on Power Delivery, 68 (3): 8-16 (1991)

Abstract

Insulators on HVDC lines may be damaged or lose their mechanical strength by electrolytic corrosion of the metal hardware. DC exposure tests of insulators have been conducted for 20 years at the Central Research Institute of Electric Power Industry. This paper describes the results of investigation on the electrolytic corrosion of the metal hardware of DC disc and cylindrical insulators and on the leakage electricity quantity flowing on their surface. It also describes methods of life estimation of the metal hardware of insulators and prevention against the corrosion.

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