Application of a gas mixture with c-C4F8 in gas insulation

High global warming potential of SF₆ gas has stimulated the active studies of searching for a substitute gas or mixture with lower environmental impact. As there exist many hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs) with much lower warming potential than SF₆, we suggest the possibility of applying a mixture composed of one such gas with reduced warming potential. Furthermore, a component gas with higher boiling point than SF₆ may mitigate the difficulty of recovering the component gas in liquid state. This paper discusses the application of c-C₄F₈ (perfluorocyclobutan, C-318) for a gas mixture examining the environmental, physical and electrical aspects