Leakage current measurement of epoxy resin compound with silicon rubber

Currently polymer materials have been widely used in the distribution and transmission as electrical insulators such as epoxy resin. Several advantages of using epoxy resin as an insulating material are its low density, better dielectric properties, and epoxy resin has higher volume resistivity than that of the glass and porcelain. However, epoxy resin has some disadvantages when it is used in tropical areas concerning with the humidity factor, high ultraviolet radiation, acid rain and effects of contaminants. Consequently, insulator surface will be easily damaged due to electrical tracking, which is indicated by the surface tracking. Silicon rubber was added to improve the dielectric properties such as hydrophobicity angle.