Abstract
AbstractAs an antivandalism measure, polymer insulators, which are light and show good performance with regard to contamination withstand voltage, have already been adopted for many new power transmission lines, mainly in the United States. However, they are subject to aging deterioration promoted by ultraviolet rays, ozone, leakage currents, and partial discharge, because polymer insulators are made of organic materials. It is important that we understand the characteristics of aging deterioration in order to maintain power transmission lines. Since polymer insulators for power transmission lines are more expensive than ceramic ones, they are little used in Japan, and there are no field data. In this study, we installed polymer insulators on a 77‐kV power transmission line, carried out field testing for 9 years, from 1997 to 2006, and investigated the electrical and mechanical characteristics of the insulators. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 175(3): 20–26, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21068
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