SF₆와 이종절연재의 연면방전 특성 비교

In this paper describes the comparisons of the surface flashover characteristics according to the change of the insulation media by experimental GIS(Gas Insulated Switchgear) chamber in accordance with change of pressure(P) and electrode distance(d). The using insulation medias are SF?, Dry-Air, I-Air(Imitation Air, N₂ : O₂ = 79[%] : 21[%]), N₂:O₂ mixture gas and pure N₂. In this study, in order to compare the properties SF? and order insulation gas, we investigated the properties of the various insulation media with a knife to knife electrode under ac high voltage application. The gas pressure was changed from 1 to 5[atm]. as a result, it was found that dielectric strength is SF? > I-Air > Dry-Air and the best environmental preservation gas is Dry-Air.