Salt fog testing of glass insulators with different surface conditions

This work explores the salt fog test to evaluate the performance of glass insulators used in a 230 kV transmission line. Three types of glass insulators were used, from the field with original contamination, a clean one, and a RTV coated one. The results have demonstrated that the pre-contamination have a role in salt fog performance and that the RTV coated insulator has shown least leakage current and was the last to fail in the salt fog.