The change of surface leakage current of composite insulators in salt-fog test

Author

Liang, X.D. ; Li, J. ; Xue, J.Q. ; Warren, L.

Author_Institution

Tsinghua Univ., Beijing, China

fYear

1992

fDate

7-10 Sep 1992

Firstpage

41

Lastpage

44

Abstract

The 1000 hours accelerated salt-fog ageing test has been used to determine the change of the hydrophobicity of HTV silicone rubber composite insulators by measuring the surface leakage current and observing the state of water repellency on the shed surface. The measured surface leakage current throughout the 1000 hours test is shown in the text. The leakage current was found to increase gradually from 10 ^-5 A to 10^-2 A. It was found that the degradation process of HTV silicone rubber composite insulators could be divided into four stages according to its surface leakage current, and each stage corresponds to different water repellent states of its shed surface

Keywords

ageing; composite insulating materials; environmental degradation; environmental testing; insulation testing; leakage currents; life testing; rubber; silicones; 1000 h; 10^-5 to 10^-2 A; HTV silicone rubber; accelerated salt-fog ageing test; composite insulators; degradation process; hydrophobicity; salt-fog test; shed surface; surface leakage current; water repellency;

fLanguage

English

Publisher

iet

Conference_Titel

Dielectric Materials, Measurements and Applications, 1992., Sixth International Conference on

Conference_Location

Manchester

Print_ISBN

0-85296-551-6

Type

conf

Filename

186876