Abstract
Rejuvenation technique on cable insulation failures is a hot topic in improving production benefits for electric related enterprises. Breaking the traditional thought of repair action without extensive former damage in scale of the cable insulation, the proposed technique starts from the local standard geometry elimination on insulation or sheaths around cable insulation failure section(s). And then, one standard injection molding technique is applied for rejuvenation on eliminated insulation no matter of the failure resulting from water tree or local mechanical damage or other modes. By this advancement, an injection molding technique is perfectly developed for rejuvenation on cable insulation failure. Frame work on this technigue is hear introduced and it consists of three branches including injection molding material development, standard injection plastic molding technique, and coded quality approval regularities. Realizability and reliability of the present technigue have been verified by sampling testing to expect to be wide applied in production.
Highlights
Cable is the basic component of electrical equipment which is widely applied in power transmission
One is water tree damage in which the cable is used in humid environment
Water trees continue to develop into electric trees, and the electric trees result in the cable does not work normally [1,2,3]
Summary
Cable is the basic component of electrical equipment which is widely applied in power transmission. One is water tree damage in which the cable is used in humid environment. Due to the existence of tiny defects on the surface of cable conductive body, water molecules in the environment are gathered to form water trees under the action of electric field. In view of water tree damaged failure, a comprehensive method of liquid injection chemistry was developed to try to restore the cable function[4]. In which the rejuvenation fluid was injected into the interface between the cable insulation and the conductor body where water tree damage was existent and a stable and insulating compound was expected to be formed. To assure high quality repair effect, a new cable repair technique-insulation injection molding rejuvenation technique is developed by the present team.
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