Creeping discharge characteristics under non-uniform field on single pulse voltage application in CO2/N2 mixtures

N2, CO2 and their mixtures as well as SF6/N2 mixtures have been interested in the practical application as an insulating medium in place of SF6. However, the insulation characteristics of those gases under the non-uniform field have not been clarified. Especially, creeping flashover characteristics have not been elucidated. In this work, creeping discharge characteristics in CO2/N2 mixtures under steep-front pulse voltage on non-uniform field have been investigated. It is well-known that CO2 gas is also electronegative gas, but its electronegativity is very weak. In the case of CO2/N2 mixed gas, the dependency of gas content on flashover voltage is quite different from that in the case of SF6/N2 seen in our previous work, a maximum value of flashover voltage has been observed for 10 to 30%…