Abstract: A container for storing and transporting a dielectric insulation medium, including: a container interior for containing the dielectric insulation medium, and connecting means for connecting the container to an electrical apparatus of medium or high voltage and filling a housing of the electrical apparatus with the dielectric insulation medium, said dielectric insulation medium being a mixture of an organofluorine compound or a mixture of organofluorine compounds as component A, the molar percentage of component A being in a range from 1 to 15 mol %, and a carrier gas compound or a mixture of carrier gas compounds other than an organofluorine compound as component B. The component B may include nitrogen, the molar percentage of nitrogen in the dielectric insulation medium being at least 65 mol %, and the minimum storage and transportation temperature of the container is equal or higher than the cricondentherm of the insulation medium.

Abstract: An instrument transformer of a type designed for using an insulation medium containing SF6, said instrument transformer including a housing enclosing an insulation space and further including an electrical active part arranged in the insulation space, said insulation space containing a dielectric insulation medium. The instrument transformer is characterized in that the dielectric insulation medium contains a gaseous mixture including from 3 to 5 mol-% of heptafluoroisobutyronitrile, from 4 to 11 mol-% of oxygen (O2) and from 84 to 93 mol-% of nitrogen (N2).

Abstract: The present invention relates to a method for re-establishing an electrical apparatus of medium or high voltage. The method includes providing an electrical apparatus designed for using an insulation medium containing SF6, removing SF6 from an insulation space contained in the apparatus and filling an alternative insulation medium into the insulation space, wherein the alternative insulation medium is a mixture of at least one organofluorine compound A and a carrier gas containing nitrogen.