Patent ID: 8410366
Filing Date: 2013-04-02
Classification: H02G

Abstract:
1. A protection device for a power cable that comprises a central conductor surrounded by insulation based on paper impregnated with material based on impregnation oil, an end of the central conductor penetrating a connector, the protection device comprising: a sheath around the insulation, a first portion of the power cable being stripped of the sheath, an adjacent portion of the power cable being stripped of both the insulation and the sheath, the adjacent portion of the power cable penetrating the connector; an outer protection extending over at least the first portion and the adjacent portion of the power cable, and extending over the connector; and a plug of high-permittivity mastic material filling an axial space extending along the adjacent portion of the power cable; wherein the outer protection comprises a continuous barrier layer placed in contact with the insulation along at least part of the first portion of the power cable, wherein the continuous barrier layer includes elastomer material that is virtually impermeable to the impregnation oil, and wherein the plug axially separates the continuous barrier layer and the connector so as to prevent migration of the impregnation oil into the connector.