Analysis of SF6 decomposition products by insulator flashover to detect the insulator condition

An evident fault occurs on the insulator surface accompanied by a remarkable insulator strength decline were detected, which is probably caused by the SF₆ decomposition products in the insulator flashover process. A simulation of flashover process on the insulator surface was built in this article in order to analyze the possible decomposition product of SF6. As a result, several specific decomposition products (eg. CS₂) of the primary insulator material were discovered, which make it possible to assume the reaction mechanism and further application of insulator flashover process via analysis of specific gas such as CS₂.