Comparative Properties of HTV Silicone Rubber for Composite Insulators - ATH and Silica Fillers

Ilhan S. , Tuzun D., Ozdemir A.

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, vol.28, no.2, pp.414-422, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1109/tdei.2020.009183
  • Page Numbers: pp.414-422
  • Keywords: HTV silicone rubber, ATH filler, silica filler, erosion, leakage current, maximum temperature, inclined-plane test, EROSION RESISTANCE, INORGANIC FILLERS, TRACKING, SUPPRESSION, PARTICLES


This paper presents a comparative evaluation of high temperature vulcanizing (HTV) silicone rubber consisting of ATH and silica fillers for use as the housing of outdoor composite insulators. Various volume filler fractions (vol%) of alumina trihydrate (ATH) and silica (SiO2) and several median particle sizes are incorporated into HTV silicone rubber and evaluated for erosion and tracking resistances using the inclined-plane tracking and erosion tests (IPT), in accordance with IEC 60587 at several AC test voltages. Test durations, eroded masses, erosion depths, and leakage currents are reported. The dry-band arcing temperatures of the various samples are recorded during the tests. The results show that at 30 vol% filler fractions, ATH filled samples show lower erosion than the corresponding silica filled samples; however, at 15 vol% fraction, the silica filled samples show lower erosion. For most tested conditions, the maximum dry-band temperatures of the silica filled samples are lower than the corresponding ATH filled samples.