SUPPORT ISOLANT D'ANCRAGE POUR MATERIEL ELECTRIQUE A HAUTE TENSION

摘要

An insulating stay is disclosed which comprises a central core having high electrical resistance and high tensile strength; and a sheath of high electrical resistivity including fins to offer a maximum resistance path to possible surface current loses. The central core is made of resin reinforced with long, continuous fibers, advantageously of epoxy resin reinforced with glass fibers. The sheath is made of a natural or synthetic polymer, and advantageously of EPDM elastomer. The stay is manufactured by coating the central core with a high viscosity glue having high longitudinal resistivity, then wrapping the glue-covered core in a hollow tube of raw elastomer and placing the assembly in a mold where the fins are formed in the sheath and where the raw elastomer of the tube is polymerized by vulcanization. The stay is intended for bracing electrical installations that need to be isolated and placed at some distance from the ground.