GAS-INSULATED ELECTRICAL APPARATUS COMPRISING CARBON DIOXIDE, HEPTAFLUOROISOBUTYRONITRILE AND A HIGH CONTENT OF OXYGEN

摘要

The present invention concerns a medium- or high-voltage equipment including a leaktight enclosure in which there are located electrical components and a gas mixture for providing electrical insulation and/or for extinguishing electric arcs that are likely to occur in said enclosure, the gas mixture comprising heptafluoroisobutyronitrile, carbon dioxide and a high content of oxygen.