| Authors |
Chang-Ho Lim ; Eun-Hyeok Choi ; Do-Seok Kim ; Young-Su Kim ; Won-Zoo Park ; Kwang-Sik Lee |
| Keywords |
Imitation-Air ; GIS ; Phase transition ; SF? |
| Abstract |
This paper describes experiments of the breakdown characteristics by temperature change of SF? gas and Imitation Air(I-Air) in model GIS(Gas Insulated Switchgear). From the results of the experiments, the breakdown characteristics classify the vapor stage of SF? according to Paschen"s law, in which the stage of coexistence for gas & liquid of the voltage value increases. This results in large deviation and the breakdown of the voltage(VB) low stage as the interior of the chamber is filled with a mixture of SF? that is not liquefacted and remaining air that can not be ventilated. The ability of SF? liquid(LSF?) insulation is higher than high-pressurize SF? gas. The VB of the I-Air decreases as the temperature drops and the VB also drops. It is considered that the results of this paper are fundamental data for the electric insulation design of superconductor and cryogenic equipment that will be studied and developed in the future. |