Electron Swarms Parameters in CF<sub>3</sub>SO<sub>2</sub>F as an Alternative Gas to SF<sub>6</sub>
Yunxiang Long, Liping Guo, Yi Wang, Cheng Chen, Yiheng Chen, Fang Li, Wenjun Zhou
Abstract
The electron swarms parameters of trifluoromethanesulfonyl fluoride (CF3SO2F) with a low value of global warming potential (GWP) of 3678 were measured for a range of reduced electric fields (per gas density N) E/N from 400 to 750 Td at room temperature (20 °C). The discharge parameters such as the reduced Townsend first ionization coefficient α/N, the reduced attachment coefficient η/N, and the reduced effective ionization coefficients (α–η)/N are obtained by using the steady-state Townsend method. The comparison of the experimental results with those of SF6, a kind of the most widely used insulation gas, indicates that CF3SO2F has a better insulation performance than SF6 because of a much higher reduced critical electric field of 578.8 Td.