Title :
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
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;
Conference_Titel :
Dielectric Materials, Measurements and Applications, 1992., Sixth International Conference on
Conference_Location :
Manchester
Print_ISBN :
0-85296-551-6
