GAS-INSULATED MEDIUM OR HIGH-VOLTAGE ELECTRICAL APPARATUS INCLUDING CARBON DIOXIDE, OXYGEN, AND HEPTAFLUORO-ISOBUTYRONITRILE
First Claim
1. 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, wherein the gas mixture comprises heptafluoroisobutyronitrile, carbon dioxide, and oxygen, the oxygen being present in said gaseous medium at a molar percentage lying in the range 1% to 25%.
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Accused Products
Abstract
The present invention provides 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 oxygen in small quantities. Electrical components covered in a solid dielectric layer of varying thickness are located inside said leaktight enclosure of the equipment of the invention.
6 Citations
15 Claims
- 1. 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, wherein the gas mixture comprises heptafluoroisobutyronitrile, carbon dioxide, and oxygen, the oxygen being present in said gaseous medium at a molar percentage lying in the range 1% to 25%.
Specification