Submarine cable having heterogeneous armour
AssigneeLs Cable & System Ltd.
InventorsSoon Chul JUNG, Seon Tae KIM, Kum Hwan CHA, Jee Yong PARK, Kyoung Soo KIM, Doo Yeon KIM, Seung Chol LEE, Ji Young KIM
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Abstract
The present invention relates to a submarine cable having a bimetallic armor. In particular, the present invention relates to a submarine cable capable of effectively suppressing damage to and corrosion of an armor formed of different types of metals due to a local decrease in tensile strength thereof and capable of avoiding an increase in an external diameter of the cable, the structural instability of the cable, and damage to the cable during the manufacture and installation thereof.
Claims21
A submarine cable which includes at least one cable core and a cable protective layer covering the at least one cable core, the submarine cable comprising:
- a first section of which at least a portion is installed at a bottom of a sea;
- and
- a second section of which at least a portion is installed in land,
- wherein each of the at least one cable core comprises a conductor, an inner semiconductive layer covering the conductor, an insulating layer covering the inner semiconductive layer, an outer semiconductive layer covering the insulating layer and a metal sheath layer covering the outer semiconductive layer,
- wherein the cable protective layer comprises an armor, and the armor comprises a plurality of metal wires spirally covering the at least one cable core,
- wherein each of the metal wires is formed by connecting a first metal wire included in the armor disposed in the first section and a second metal wire included in the armor disposed in the second section,
- wherein the first metal wire is formed of a first metal material, and the second metal wire is formed of a second metal material which is different from the first metal material, and
- wherein the cable protective layer comprises an electrolyte blocking film configured to protect a connection part of the first metal wire and the second metal wire from an electrolyte.
A submarine cable which includes at least one cable core and a cable protective layer covering the at least one cable core, the submarine cable comprising:
- a first section of which at least a portion is installed at a bottom of a sea;
- and
- a second section of which at least a portion is installed in land,
- wherein each of the at least one cable core comprises a conductor, an inner semiconductive layer covering the conductor, an insulating layer covering the inner semiconductive layer, an outer semiconductive layer covering the insulating layer and a metal sheath layer covering the outer semiconductive layer,
- wherein the cable protective layer comprises an armor, and the armor comprises a plurality of metal wires spirally covering the at least one cable core,
- wherein each of the metal wires is formed by connecting a first metal wire included in the armor disposed in the first section and a second metal wire included in the armor disposed in the second section,
- wherein the first metal wire is formed of a first metal material, and the second metal wire is formed of a second metal material which is different from the first metal material, and
- wherein a surface of the first metal wire, a surface of the second metal wire, or surfaces of both the first and second metal wires are coated with polymer resin.
A submarine cable which includes at least one cable core and a cable protective layer covering the at least one cable core, the submarine cable comprising:
- a first section of which at least a portion is installed at a bottom of a sea;
- and
- a second section of which at least a portion is installed in land,
- wherein each of the at least one cable core comprises a conductor, an inner semiconductive layer covering the conductor, an insulating layer covering the inner semiconductive layer, an outer semiconductive layer covering the insulating layer and a metal sheath layer covering the outer semiconductive layer,
- wherein the cable protective layer comprises an armor, and the armor comprises a plurality of metal wires spirally covering the at least one cable core,
- wherein each of the metal wires is formed by connecting a first metal wire included in the armor disposed in the first section and a second metal wire included in the armor disposed in the second section,
- wherein the first metal wire is formed of a first metal material, and the second metal wire is formed of a second metal material which is different from the first metal material, and
- wherein the armor comprises at least one galvanic anode wire arranged in parallel to the metal wire, and formed of a fourth metal material having a lower self-potential than those of the first metal material and the second metal material.
A submarine cable which includes at least one cable core and a cable protective layer covering the at least one cable core, the submarine cable comprising:
- a first section of which at least a portion is installed at a bottom of a sea;
- and
- a second section of which at least a portion is installed in land,
- wherein each of the at least one cable core comprises a conductor, an inner semiconductive layer covering the conductor, an insulating layer covering the inner semiconductive layer, an outer semiconductive layer covering the insulating layer and a metal sheath layer covering the outer semiconductive layer,
- wherein the cable protective layer comprises an armor, and the armor comprises a plurality of metal wires spirally covering the at least one cable core,
- wherein each of the metal wires is formed by connecting a first metal wire included in the armor disposed in the first section and a second metal wire included in the armor disposed in the second section,
- wherein the first metal wire is formed of a first metal material, and the second metal wire is formed of a second metal material which is different from the first metal material, and
- wherein a number of connection parts of the first and second metal wires per unit length of 1 m of the submarine cable is n/8 or less, and wherein n represents a total number of the metal wires included in the armor.
Dependencies are inferred from the claim text.