New semiconductive compound technology for solid dielectric insulated power cables

Abstract

New formulation technologies have been developed for application in semiconductive conductor shield compounds. These technologies offer several advantages for conductor shields relative to the traditional polyethylene copolymers of alkyl-acrylate, or vinyl-acetate, that have been in commercial use for over 30 years. New semiconductive conductor shield compounds have been tested extensively both in the laboratory and on insulated power cables. A conventional shield class of product was produced with the new technology utilizing a furnace black. It was used to manufacture a commercial scale 15 kV cable with XLPE insulation. This cable was then tested in long term wet aging under 4,4' ACLT conditions and found to exhibit excellent performance. The cable extrusion study showed excellent processability in comparison to conventional shields.