Study on thermal degradation and kinetic characteristics of insulating materials used in high voltage switchgear

Abstract

This study adopts the FT-IR, DSC, TG and other methods, studied the commonly used in high-voltage switchgear XLPE, EP and organic silicone materials in the same heating rate under thermal degradation properties of three kinds of insulating materials by calculation under different temperature of pyrolysis reaction apparent activation energy E and refers to the former factor to determine its dynamic characteristics. The results showed that the activation energies of epoxy resin, crosslinked polyethylene and silicone rubber were 63.53 kJ·mol-1, 99.66 kJ·mol-1, 62.59 kJ·mol-1, respectively. The pre-exponential factors were 3.2×105·s-1, 4.3×107·s-1 and 1386.9·s-1, respectively.