Hybrid electrical-optical cable for overhead installation
AssigneePirelli Cavi e Sistemi S.p.A.
InventorsErnesto Zaccone, Sergio Belli, Giuseppe Casanova, Paolo Marelli
Life of this patent
Estimating the term…
Abstract
Hybrid electrical-optical cable for overhead installations for power distribution and for telecommunications, comprising three insulated phase conductors helically wound around a supporting rope. Inside the supporting rope there is at least one optical fibre element fitted in a tubular structure which resists transverse compression, a supporting structure resistant to longitudinal tension being present around the said tubular structure.
Claims29
Hybrid electrical-optical cable for overhead installations, comprising three insulated phase conductors helically wound around a supporting rope, wherein said supporting rope comprises:
- at least one optical fibre element comprising at least one tubular element containing at least one optical fibre;
- a tubular structure containing said at least one optical element, said tubular structure being made from a material having a high mechanical modulus to resist transverse compression;
- a supporting structure resistant to longitudinal tension placed externally to said tubular structure.
Optical fibre element comprising at least one optical fibre coated by at least a containing layer, said optical fibre element being fitted in a tubular structure made from an expanded polymeric material.
Overhead system for electrical power distribution and for telecommunications, comprising a cable comprising three insulated phase conductors wound around a supporting rope, said cable being fixed between sustaining structures by mooring means operating on said supporting rope, characterized in that said supporting rope comprises at least one optical fibre element fitted in a tubular structure resisting to transverse compression.
Method for suspending a hybrid electrical-optical cable to an overhead line, said cable comprising:
- three insulated phase conductors helically wound around a supporting rope,
- a tubular structure made of a high mechanical modulus material suitable for containing at least one optical element, said at least one optical element comprising at least one tubular element containing at least one optical fibre, and
- a supporting structure placed externally to said tubular structure,
- wherein said method comprises:
- pushing at least one of the three insulated conductors so as to make the supporting rope accessible from the outside;
- hooking the supporting rope by a hooking means;
- extracting the supporting rope by the hooking means from the wound insulated conductors for a predetermined length;
- clamping the extracted length of the supporting rope by a mooring means;
- releasing the supporting rope from the hooking means;
- and
- suspending the cable to sustaining structures of the overhead line by the mooring means.
Dependencies are inferred from the claim text.