| Title |
The Phase Transition and Breakdown Characteristics of SF6 in a Temperature Decline |
| Authors |
Jong-Hwan Kim ; Eun-Hyeok Choi ; Kwang-Seo Park ; Dae-Hee Yoon ; Lee-Kook Kim ; Kwang-Sik Lee |
| Keywords |
SF6 ; GIS ; Phase transition |
| Abstract |
In this paper, insulations characteristics by temperature changes(+30～-40[℃]) of SF6 gas in the experimental chamber were studied. From this result, The breakdown characteristics classify the vapor stage of SF6 according the Paschen’s law, the gas & liquid coexisted stage of voltage value increases & much deviation and the VB low stage as the interior of chamber gets filled with mixture of SF6 that are not liquefacted and remaining air which couldn’t be ventilated. In addition the ability of insulation of liquid SF6 was higher than that of the highly pressurized SF6 gas. In this research, we want to provide the base data on designing insulation of high-temperature superconductor and the cryogenic equipments by investigating the insulation characteristics of SF6. |