Suppression mechanism of leakage current on RTV coated porcelain and silicone rubber insulators

摘要

The results of a study on the suppression of leakage current on room temperature vulcanizing (RTV) silicone rubber coated porcelain suspension insulators in a salt-fog chamber are reported. A comparative study of the performance of coatings on different parts of suspension insulators with RTV is reported. The results of attenuated total reflection (ATR) Fourier transform infrared (FTIR) spectroscopy are reported. On the basis of these results, a suppression mechanism for leakage current is suggested. A mechanism for the suppression of leakage current on RTV coated porcelain and silicone rubber insulators dealing with the temporary loss of hydrophobicity and its return is suggested.