A Comparision of the Breakdown Characteristics for $SF_6$ and I-Air based on Temperature variations

온도변화에 따른 $SF_6$와 I-Air의 절연파괴특성 비교

This paper gives a basic data of the breakdown characteristics of l-Air(Imitation Air, $N_2:O_2=79:21$) and $SF_6$ gas based on temperature variations in experimental GIS model by applying negative DC voltage. The breakdown charcteristics were compared with gas pressures and each gas already entered in GIS model. The characteristics of l-Air and $SF_6$ were different in specific temperature range that $SF_6$ gas was being liquefied. The breakdown voltages of $SF_6$ were more higher than l-Air except for 4[atm] at $-10{\sim}0[^{\circ}C]$.