Evaluation of the Supportability and Electrical Performance of RTV Coatings Filled with Carnauba Wax under Pollution Conditions

This paper is an experimental study to evaluates the performance of Room Temperature Vulcanizing Silicone Rubber (RTV-SIR) coatings filled with carnauba wax and Alumina Trihydrate (ATH). The coatings were applied to glass insulators and subjected to pollution tests. The insulators performance was evaluated through the application of disruptive discharges and applied voltage under fog while monitoring the leakage current. The experimental results showed a reduction in leakage current and improved insulator performance for RTV-SIR coatings filled with carnauba wax under pollution conditions. The best results were achieved for coatings added with ATH and carnauba wax, indicated by the sample with the percentage composition of 75% RTV, 20% ATH and 5% carnauba wax.