Patent ID: 8080185

Claim:
A method of using a gaseous dielectric compound to insulate electrical equipment comprising the steps of: providing electrical equipment configured to have an insulation gas, the electrical equipment being selected from the group consisting of current-interruption equipment, gas-insulated transmission lines, gas-insulated transformers, and gas-insulated substations; and placing an insulation gas in the electrical equipment, the insulation gas consisting of: at least one gas selected from the group consisting of nitrogen, CO 2 and N 2 O; and a gaseous compound selected to have each of the following properties: a boiling point in the range between about −20° C. to about −273° C.; a GWP less than about 22,200; chemical stability, as measured by a negative standard enthalpy of formation (dHf<0); a toxicity level such that when the dielectric gas leaks, the effective diluted concentration does not exceed its PEL in the working environment; and a dielectric strength greater than air.