公开(公告)号：US11335477B2

公开(公告)日：2022-05-17

申请号：US17056611

申请日：2018-05-25

Applicant: Prysmian S.p.A.

Inventor： Fabrizio Cristofani ,  Paolo Liboi ,  Silvio Frigerio ,  Giovanni Pozzati

IPC: H01B7/02 ,  H01B7/282

Abstract: A power cable has an insulated conductor; a copper water barrier, in form of a tube with a welding line, surrounding each insulated conductor; and a polymeric sheath surrounding each copper water barrier. The copper water barrier has a thickness and the polymeric sheath has a thickness such that a ratio between the thickness of the copper water barrier and the thickness of the polymeric sheath is 0.15 at most.

公开(公告)号：US11195640B2

公开(公告)日：2021-12-07

申请号：US17017618

申请日：2020-09-10

Applicant: PRYSMIAN S.p.A.

Inventor： Giovanni Pozzati ,  Fabrizio Cristofani ,  Silvio Frigerio ,  Paolo Liboi

IPC: H01B7/20 ,  H01B7/14 ,  H01B7/18 ,  H01B9/00 ,  H01B13/22 ,  H01B13/24

Abstract: Process for manufacturing a power cable includes: providing a power cable core having an electric conductor; providing a copper foil; providing a protective strip over the power cable core, the protective strip having a radially inner and outer surface and being made of copper with a coating; folding the copper foil around the power cable core so as to bring two longitudinal copper foil rims to contact one to the other; welding the two contacted longitudinal copper foil rims thus obtaining a copper sheath in form of a tube with a welding seam; reducing the diameter of the copper sheath to put it into direct contact with the power cable core and the protective strip; heating the protective strip and the copper sheath at a temperature higher than the melting temperature of the coating of the strip so that the coating fuses in the welding seam.