DocumentCode :
2212303
Title :
Improvement of Contamination Flashover Voltage Performance of Cylindrical Porcelain Insulators
Author :
Yamada, Kazuma ; Hayashi, Akio ; Saka, Chiharu ; Sakanishi, Kenji ; Matsuoka, Ryosuke
Author_Institution :
Dept. of Electr. Eng., Chubu Univ., Kasugai
fYear :
2008
fDate :
9-12 June 2008
Firstpage :
69
Lastpage :
72
Abstract :
Superior contamination flashover voltage performance of polymer insulators for transmission or distribution line is attributable not only to the hydrophobicity of silicone rubber housing material but also to their configurations. In the case of transmission or distribution line polymer insulators, core diameters are small and so the ratio of shed to core diameters is very large enough to improve the voltage distribution along the insulator owing to the divided and allotted voltages to its individual core portions having much higher surface resistances compared with shed portions due to the heavier leakage current density. We tried to improve the contamination flashover voltage performance of a porcelain long-rod insulator by applying hydrophobic silicone rubber coating only to all its core surfaces without coating shed surfaces and successful results have been confirmed. In this paper, contamination flashover voltage performances were evaluated among four kinds of specimens with different silicone rubber coatings by the salt fog test method. The detailed investigation results are presented.
Keywords :
contamination; flashover; leakage currents; polymer insulators; power distribution lines; power transmission lines; surface resistance; contamination flashover voltage performance; cylindrical porcelain insulators; distribution line; hydrophobic silicone rubber coating; leakage current; polymer insulators; porcelain long-rod insulator; silicone rubber housing material; surface resistances; transmission line; voltage distribution; Coatings; Flashover; Leakage current; Performance evaluation; Plastic insulation; Polymers; Porcelain; Rubber; Surface contamination; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation, 2008. ISEI 2008. Conference Record of the 2008 IEEE International Symposium on
Conference_Location :
Vancouver, BC
ISSN :
1089-084X
Print_ISBN :
978-1-4244-2091-9
Electronic_ISBN :
1089-084X
Type :
conf
DOI :
10.1109/ELINSL.2008.4570280
Filename :
4570280
Link To Document :
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