New Development of Eco-Friendly Epoxy Solid Insulation System Osamu Tsujimoto - (PPT)

摘要

Sulfur hexafluoride (SF_6) gas is not approved for use as an insulation medium in medium voltage (MV) and high voltage (HV) electrical apparatus. This is because SF_6 is listed as a greenhouse gas by the Intergovernmental Panel on Climate Change. Solid insulation techniques, especially solid insulated epoxy systems, have been developed as an eco-friendly replacement for SF_6. The epoxy system used in solid insulated apparatus must have very specific properties, such as a high glass transition temperature (Tg), low coefficient of thermal expansion (CTE), low electric loss (Tδ) as well as high long-term mechanical and electrical stability. These are all directly related to the service life of solid insulated apparatus.