EHV Cables with Compressed SF6 Gas Insulation

An EHV power cable with compressed pure SF
₆
gas insulation was produced experimentally, and succeeded in the dielectric withstand test. The outside diameter of one phase of the cable was 14 inches. The conductor, composed of a metal pipe 4½ inches in diameter, was arranged at the center of the outer pipe, and supported by spacers placed at intervals of about 15 feet.