This paper presents a theoretical method for calculating the flashover voltage of ceramic and composite insulators under wet conditions. The insulator surface is assumed to be clean. A 3-dimensional computer package (Coulomb) was used to calculate the electric field of wet surfaces. The surface wettability has been varied from hydrophobic to hydrophilic using the Swedish transmission research institute (STRI) method of classification. The calculated results are in good agreement with published data.
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R.S. Gorur (2008) studied this question.
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