Abstract

The paper presents the merits of RTV coated glass insulators over silicone rubber composite insulators. The weaknesses of silicone rubber composite insulators are discussed that come about because of inadequate relief of electric stress, poor design concepts, lack of understanding of composite insulator material properties and poor quality control during their manufacture. RTV coated glass insulators are shown to be the closest to the ideal insulator for polluted environments and one that has the lowest life-cycle cost.

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