Corona characteristics for free conducting particles in various SF/sub 6/-gas mixtures

This paper reports on experimental investigations concerning the behavior of pulsative corona discharges from free conducting wire particles of different sizes in parallel plane and concave electrode systems, insulated with SF/sub 6/ and its mixtures with nitrogen N/sub 2/, triethylamine (C/sub 2/H/sub 5/)/sub 3/N and perfluorocarbon C/sub 8/F/sub 16/O gases. Corona inception and particle lift-off voltages as well as corona charge levels are measured for different experimental conditions. The results show that corona and particle lift-off characteristics are affected by particle parameters, electrode shape and gas composition. Generally, addition of triethylamine and perfluorocarbon to SF/sub 6/ reduces the corona charge level.<
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