Title :
Chemical and electrical techniques for condition assessment of composite insulators
Author :
Zhou, JianBin ; Birtwhistle, David ; Cash, Gregary A.
Author_Institution :
Queensland Univ. of Technol., Brisbane, Qld., Australia
Abstract :
In this paper, the results of fog tests on eight different surface-coated 11 kV EPDM insulators were presented. The objective of tests is to examine electrical characteristics of composite insulators during degradation. Leakage currents were found to be determined by shed surface condition. The electrical test results were compared with results of chemical surface analysis, which gave two numerical indicators: oxidation index and ester/ketone ratio. Surface condition of insulator was also examined by scanning electron micrograph. The electrical and chemical analysis results give useful and related indicator of surface condition.
Keywords :
composite insulators; insulator testing; leakage currents; oxidation; polymer blends; scanning electron microscopy; silicone rubber; silicone rubber insulators; 11 kV; chemical surface analysis; composite insulators; electrical characteristics; electrical test; ester-ketone; fog tests; leakage currents; numerical indicators; oxidation index; scanning electron micrograph; surface-coated EPDM insulators; Chemical analysis; Chemical technology; Circuit testing; Coatings; Degradation; Dielectrics and electrical insulation; Insulator testing; Leakage current; Power transformer insulation; Water pollution;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218379
