Improved Dielectric Strength of SF6 Gas with a Trichlorotrifluoroethane Vapor Additive

A study of alternative insulating gases to SF6

“…leader which causes breakdown in a non-uniform field can be inhibited by adding traces of compounds such as TEA (triethylamine) [6], MEK (methylethylketone) [7] and some freons (e.g. R113, R12 etc) [8,9], which, when added to SF 6 in small quantities (<1%), result in improved corona stabilization and an increase in the leader propagation field. Because of the small concentrations used, there is little change in the effective ionization coefficient and hence in the uniform field dielectric strength relative to pure SF 6 , but the particle triggered breakdown voltage may be increased by 50%.…”

Composition of a Thermal Plasma Formed From Ptfe With Copper in Non-Oxidant Atmosphere, Part I: Definition of a Test Case With the Sf6

“…PTFE (C 2 F 4 ) n and sulphur Hexafluoride SF6 are widely used in industry for electrical insulating purposes and also in circuit breakers [1][2][3][4][5]. The SF 6 gas has been well studied since a long time ago [5].…”

Composition of a Thermal Plasma Formed From Ptfe With Copper in Non-Oxidant Atmosphere, Part Ii: Comparison of a Test Case With Nitrogen

“…In our previous paper we have define a test case with the SF 6 , PTFE and Cu to choose the better insulating compounds [1]. As a matter of fact the SF 6 gas is widely used for electrical insulating and in high voltage circuit breakers [2][3][4][5][6]. The environmental impact and the life cycle cost are, at the present time, keys for new markets.…”