METHOD FOR TREATING ELECTRICAL CABLE AT SUSTAINED ELEVATED PRESSURE

摘要

A method for enhancing the dielectric properties of an electrical cable segment having a central stranded conductor encased in a polymeric insulatio n jacket and an interstitial void volume in the region of the conductor, including filling the interstitial void volume with a dielectric property- enhancing fluid at a pressure below the elastic limit of the polymeric insulation jacket, and confining the fluid within the interstitial void volu me at a residual pressure greater than about 50 psig, with the pressure being imposed along the entire length of the segment but below the elastic limit o f the polymeric insulation jacket. Preferably, the residual pressure is sufficient to expand the interstitial void volume along the entire length of the cable segment by at least 5%.