Effect of the percentage of SF₆(100 –10 –5 ) on the decomposition of SF₆–N₂mixtures under negative dc coronas in the presence of water vapour or oxygen

Abstract

Low SF6 content SF6–N2 mixtures have recently been proposed as a replacement for pure SF6 in the insulation of gas insulated lines (GIL). Among the areas of investigation of such gas mixtures, their electrical decomposition under corona discharges must be studied considering the possible occurrence of such stress in GIL.