Performance Assessment of High-Temperature Vulcanized Silicone Rubber Insulators

Abstract

High-temperature vulcanized (HTV) silicone rubber (SIR) is commonly employed in power distribution systems because of its ability to repel water. However, when exposed to environmental stress, it is prone to tracking and erosion. Fillers, such as alumina trihydrate (ATH), have been found to have an impact on these qualities. The most effective type and ratio of filler, however, are still uncertain.

This study aims to examine how different types, sizes, and weight percentages of fillers affect the tracking and erosion resistance of HTV-SIR. The evaluation of various filler configurations is conducted using Inclined Plane Testing (IPT). The assessment also includes Hydrophobicity tests and Thermogravimetric Analysis (TGA) along with IPT. Hydrophobicity tests help determine the stability of water-repellent properties under stress, while TGA assesses thermal stability and decomposition characteristics. Prior research indicates a correlation between the kind of filler and performance. This study aims to build on these earlier findings by identifying the best filler mixture for HTV-SIR composites used in power distribution systems that improve tracking and erosion resistance. This research lays the groundwork for enhancing the endurance and reliability of HTV-SIR materials through appropriate filler selection, potentially leading to a more efficient and reliable electrical grid.