High tension electric cable with extruded insulating layers - consists of synthetic materials of different dielectric properties sandwiched between 2 semiconducting layers

摘要

A high tension electrical cable has a central conductor, a semiconducting layer surrounding the conductor, two coaxial insulating layers of synthetic materials with different dielectric properties extruded around the semiconducting layer, and a second semiconducting layer surrounding the insulating layer. The inner insulating layer may be of ethylene-propylene copolymer, and the other insulating layer may be of reticulated polyethylene. ADVANTAGE - The insulation is thin and the cable is easy to make.