A review of non-standard artificial contamination withstand test methods of composite insulators

Though many electric companies have used composite insulators (CI) for many years and there are several recommendation for their properties, there is not a universe standard for artificial contamination test of non-ceramic insulators. This paper reviews some of major non-standard pollution test methods for CI. Salt fog method cannot give consistent results with actual field results. Clean Fog test with a suitable precontamination can give better result. Besides the contamination methods, the artificial rain test for contaminated CI is also should be considered to evaluate them.