Electric cable resistant to water penetration

H - Electricity – 01 – B

Patent

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Details

H01B 7/288 (2006.01)

Patent

CA 2394846

Electric cable, in particular for power transmission or distribution at medium or high voltage, comprising a metallic screen and a water swellable layer capable of forming a barrier to the water penetration provided in a position radially external to said metallic screen. Said water swellable layer is made of an expanded polymeric material in which a water swellable material, preferably in the form of powder, is embedded.

L'invention concerne un câble électrique (20) destiné notamment à une transmission ou à une distribution d'énergie à moyenne ou haute tension. Ce câble comprend un écran métallique (5) ainsi qu'une couche gonflant dans l'eau (21) capable de former une barrière offrant une protection contre la pénétration de l'eau et se trouvant dans une position radialement extérieure par rapport audit écran métallique (5). Ladite couche gonflant dans l'eau (21) est constituée d'une matière polymérique expansée comprenant une matière gonflant dans l'eau se présentant de préférence sous forme de poudre.

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