Effect of epoxy coating on particle movement in SF6/N2 gas insulated Busduct

Due to an exceptional combination of physical and chemical properties, SF₆ has become the only insulating gas used in gas insulated electric power transmission and distribution equipment. However, the fact that SF₆ is one of the strongest man made greenhouse gases has promised a search for substitute gases with lower or no environmental impact. Thus, it is needed to develop the alternative dielectric gas or gas mixtures having better insulating characteristics and no greenhouse effect. The main issue concerning the practical use of such mixtures is their behavior in the presence of metallic particle contamination. In this paper particle movement is determined in epoxy coated gas insulated Busduct with SF₆ and N₂ gas mixtures as insulating medium. In the gas mixture, conducting particle material considered for study are Aluminium, Copper and Silver. The results have been analyzed and presented.