The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2017
Filed:
Feb. 28, 2013
Nexans, Paris, FR;
Daniel Guery, Dour, BE;
Michel Martin, Thuin, BE;
NEXANS, Paris, FR;
Abstract
The invention concerns an electric power transmission cable, particularly for an overhead power line, comprising at least one central composite ring () formed of fibers impregnated by a matrix, of which the specific breaking strength is greater than 0.4 MPa·m/kg and at least one layer of conductive wires () nested within one another, made of aluminum or an aluminum alloy and windings around said ring (), said cable having an outer diameter at ambient temperature called the initial diameter (D) and the ratio between the thermal expansion coefficient of the conductive wires () and that of the central ring () is greater than three. According to the invention, said conductive wires () nested within one another are of a geometry such that the increase in the outer diameter of one length of said cable shorter than 45 m, during an increase of temperature lasting two to four minutes, from ambient temperature to a temperature between 150 and 240° C., is less than or equal to 10% of the initial diameter (Di), said cable being subject to a mechanical tension between 10% and 30% of the nominal breaking strength of the cable. The invention also concerns a conductive wire geometry enabling such a level of expansion of the diameter.