Cable joints.

摘要

An electric cable joint comprises at least one joint between line or phase conductors of the jointed cables that is surrounded by an insulating sleeve and encapsulated with it in a body of a setting resin which has electrical properties inferior to those of the sleeve and/or which encloses air-filled voids. The sleeve is made of an electrically-insulating material with a permittivity in the approximate range from 6 to 20, so providing electrical stress distribution without requiring an electrical connection to the sleeve or precise centering. Preferred sleeves are moulded from compositions based on chlorosulphonated polyethylene and include internal ribs or other projections to facilitate flow of embedding resin and of air. <IMAGE>