COMPOSITE INSULATION MATERIAL FOR AN ELECTRIC POWER CABLE, PROCESS TO MANUFACTURE A POWER CABLE AND A POWER CABLE CONTAINING THE INSULATION MATERIAL

摘要

The present invention relates to a composite insulation material for an electric power cable (10; 20)comprising a porous base material and a curing agent for a cable insulation impregnation liquid, which is curable or cross-linkable. The curing agent is embedded in a carrier material, thereby forming a curing agent capsule, and the curing agent is releasably arranged in the carrier material. The invention further relates to a process for the production of an electric power cable(10; 20) and a power cable produced. An insulation system(2; 22) comprising the composite insulation material is applied to surround the conductor. The insulation system(2; 22)is impregnated with a curable impregnation liquid and the curing is initiated by means of increased temperature, radiation or increased pressure to enable the impregnation liquid to come into contact with the curing agent. The cable is cured and a solid insulation system (2; 22) is provided on which protective material may be provided. The present material and process provide for an efficient control of the impregnation process.