Title :
Improvements to the performance of silicone rubber housed composite bushings by means of a resistive coating
Author :
Wei, Hong Jian ; Cherney, Edward A. ; Jayaram, Shesha
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
Local discharges in the vicinity of the mounting flange of composite bushings due to the electric field enhancement and dry band arcing on the surface of composite bushings can cause insulating material degradation leading to failure of the bushing. A proposed solution to this problem by employing a resistive silicone rubber coating on composite HV bushings was investigated. Good agreement was obtained between computer software simulation by FEMLAB® and measurement results of potential and field distributions. Wetting and salt-fog chamber tests verified that the resistive silicone rubber coated composite bushings have superior contamination performance.
Keywords :
arcs (electric); bushings; insulating coatings; insulator contamination; insulator testing; power engineering computing; silicone rubber insulators; wetting; composite high voltage bushing; computer software simulation; contamination performance; dry band arcing; electric field enhancement; field distribution measurement; insulating material degradation; potential measurement; resistive silicone rubber coating; salt-fog chamber test; silicone rubber housing; wetting test; Arc discharges; Coatings; Composite materials; Degradation; Dielectrics and electrical insulation; Distributed computing; Flanges; Insulators; Rubber; Surface discharges;
Conference_Titel :
Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8447-4
DOI :
10.1109/ELINSL.2004.1380577
