Method for manufacturing an electric device having an insulation system impregnated with a dielectric fluid

Abstract

A method for manufacture of an electric device having at least one conductor and a porous, fibrous and/or laminated electrically insulating dielectric system comprising a solid electrically insulating part impregnated with a dielectric fluid and a porous, fibrous and/or laminated body for use in an electric device produced with the method. The method comprises the steps of: providing a conductor and a porous, fibrous and/or laminated structure of a solid electrically insulating material associated with each other, pretreating the porous, fibrous and/or laminated body with a gelling additive such that the body comprises the gelling additive which imparts a high viscosity and elasticity to the fluid at conditions for which the device is designed to operate under, impregnating the pretreated body comprising the gelling additive with the dielectric fluid, wherein the gelling additive upon impregnation is brought into contact with the dielectric fluid and the gelling additive, at least in part, is dissolved by the fluid such that following the impregnation the dielectric fluid is gelled.

Dependencies are inferred from the claim text.