Post insulators play the role of insulation support and fixation in power grids.Operating post insulators may en-counter leakage current increase and excessively high partial temperature due to the aging and shedding of RTV coating.This paper is the causal analysis of a case of partial overheat of an actual post insulator,which mainly entails tests such as appearance inspection,salt density and ash density test,hydrophobicity test,self-cleaning test,flashover voltage test,and through which the major trigger for the partial overheat can be determined as aging and surface fouling of RTV coat-ing.
关键词
RTV涂料/支柱绝缘子/局部过热/耐压试验
Key words
RTV coating/post insulator/local overheat/flashover voltage test
维普
万方数据