Electric stress control on post-type porcelain insulators using a coating of RTV Silicone Rubber with BaTiO_3 nanofillers

摘要

In order to ensure continuous supply of power, the reliability of power transmission line must be high. One of the requirements is to minimize the flashover of the insulators when stressed under extreme harsh environmental conditions. To ensure the reliability of the ceramic insulators, coating of Room Temperature Vulcanized Silicone Rubber (RTV SIR) on the surface of the insulator has gained a lot of attention due to its several mechanical and electrical properties. In the recent years, use of nanocomposites as dielectric materials have gained edge because of their high permittivities and low dielectric losses. The present work examines the effect of using nanofillers of Barium Titanium Oxide (BaTiO_3) with RTV SIR coating on the resultant electric stress distribution over the surface of a post type insulator made of porcelain.