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AssigneeShowa Electric Wire & Cable Co., Ltd.
InventorsMitsugu Aihara, Yutaka Kogane, Yasumitsu Ebinuma, Masaki Minami
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A d.c. high tension cable termination or joint and method of manufacturing same is described. The cable comprises an electric conductor, an electrically insulating layer which is concentrically applied over the conductor, and a semi-conductive layer which is concentrically applied over the insulating layer in close contact therewith. The cable termination or joint comprises an electrically insulating liquid impregnated into a portion of the semi-conductive layer which is located adjacent to an end of the insulating layer so as to present an electrical resistance which is higher than that of the non-impregnated portion of the semi-conductive layer but is lower than that of the insulating layer. The electric conductor is electrically connected with the end of that portion of the semi-conductive layer impregnated with the insulating liquid which is located nearer the conductor.
A d.c. high tension cable termination comprising an electric conductor, an electrically insulating layer concentrically applied over the electric conductor, and a semi-conductive layer concentrically applied over the insulating layer in close contact therewith, the semi-conductive layer including an area adjacent to an end of the insulating layer which is impregnated with an electrically insulating liquid so as to present an electrical resistivity which is higher than that of the remainder of the semi-conductive layer which is not impregnated with the liquid and which is lower than that of the insulating layer, the electric conductor being electrically connected with that end of the impregnated area of the semi-conductive layer which is located nearer the conductor.
A method of forming a termination for a d.c. high tension cable which includes an electric conductor successively covered in concentric manner with an electrically insulating layer, a semi-conductive layer, and at least one additional layer, the method comprising the steps of stripping the additional layer or layers from an end of the cable to expose the semi-conductive layer, applying an electrically insulating liquid to an exposed area of the semi-conductive layer which is located adjacent to a cable end to impregnate the semi-conductive layer with the liquid, and electrically connecting the impregnated semi-conductive layer with the conductor.
Dependencies are inferred from the claim text.