Power cable with multiple water barriers

Patent metadata

Field	Value
Publication number	US-2023268097-A1
Application number	US-202318172211-A
Country	US
Kind code	A1
Filing date	Feb 21, 2023
Priority date	Feb 18, 2022
Publication date	Aug 24, 2023
Grant date	—

Abstract

A power cable comprising: a power core including: a conductor, an insulation system including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, a first metallic water blocking layer arranged concentrically with and around the outer semiconducting layer, a semiconducting polymer layer arranged concentrically with and around the first metallic water blocking layer, and a second metallic water blocking layer arranged concentrically with and around the semiconducting polymer layer; and an outer sheath arranged around the second metallic water blocking layer.

First claim

1 . A power cablecomprising:
a power core including:
a conductor,
an insulation system comprising an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer,
a first metallic water blocking layer arranged concentrically with and around the outer semiconducting layer,
a semiconducting polymer layer arranged concentrically with and around the first metallic water blocking layer,and
a second metallic water blocking layer arranged concentrically with and around the semiconducting polymer layer;and
an outer sheath arranged around the second metallic water blocking layer.

2 . The power cable as claimed in claim 1 , wherein the semiconducting polymer layer is an extruded layer.

3 . The power cable as claimed in claim 1 , wherein the first metallic water blocking layer is or includes a first metal foil.

4 . The power cable as claimed in claim 1 , wherein the second metallic water blocking layer is or claim 1 , wherein the second metallic water blocking layer includes a second metal foil.

5 . The power cable as claimed in claim 1 , wherein the first metallic water blocking layer has a first seam extending axially along the power core, the first seam being formed by bonding of overlapping edges of the first metallic water blocking layer by means of adhesive or solder.

6 . The power cable as claimed in claim 1 , wherein the second metallic water blocking layer has a second seam extending axially along the power core, the second seam being formed by bonding of overlapping edges of the second metallic water blocking layer by means of adhesive or solder.

7 . The power cable as claimed in claim 6 when dependent on claim 5 , wherein the first seam and the second seam are arranged between 90 and 270 degrees offset from each other in the circumferential direction of the power core.

8 . The power cable as claimed in claim 6 when dependent on claim 5 , wherein the first seam and the second seam are arranged between 120 and 240 degrees offset from each other in the circumferential direction of the power core.

9 . The power cable as claimed in claim 6 when dependent on claim 5 , wherein the first seam and the second seam are arranged between 160 and 200 degrees offset from each other in the circumferential direction of the power core.

10 . The power cable as claimed in claim 1 , wherein the semiconducting polymer layer adheres to the first metallic water blocking layer.

11 . The power cable as claimed in claim 1 , wherein the semiconducting polymer layer adheres to the second metallic water blocking layer.

12 . The power cable as claimed in claim 1 , wherein the first metallic water blocking layer includes aluminium, copper, or stainless steel.

13 . The power cable as claimed in claim 1 , wherein the second metallic water blocking layer includes aluminium, copper, or stainless steel.

14 . The power cable as claimed in claim 1 , wherein the power core is a first power core, and the power cable includes a second power core and a third power core each of the second power core and the third power core comprising:
a conductor, an insulation system comprising an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, a first metallic water blocking layer arranged concentrically with and around the outer semiconducting layer, a semiconducting polymer layer arranged concentrically with and around the first metallic water blocking layer, and a second metallic water blocking layer arranged concentrically with and around the semiconducting polymer layer, wherein the outer sheath is arranged around the first power core the second power core and the third power core.

15 . The power cable as claimed in claim 1 , wherein the power cable is a submarine power cable.

16 . The power cable as claimed in claim 2 , wherein the first metallic water blocking layer is or includes a first metal foil.

17 . The power cable as claimed in claim 2 , wherein the second metallic water blocking layer is or includes a second metal foil.

18 . The power cable as claimed in claim 2 , wherein the first metallic water blocking layer has a first seam extending axially along the power core, the first seam being formed by bonding of overlapping edges of the first metallic water blocking layer by means of adhesive or solder.

19 . The power cable as claimed in claim 2 , wherein the second metallic water blocking layer has a second seam extending axially along the power core, the second seam being formed by bonding of overlapping edges of the second metallic water blocking layer by means of adhesive or solder.

Assignees

• Nkt Hv Cables Ab

Inventors

• Långström Sonny
• Johansson Tommy
• Jäderberg Johan
• Sandell Håkan
• Dahl Ryde Christoffer

Classifications

• Y02A30/14

  Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables · CPC title

• H01B7/285 Primary

  by completely or partially filling interstices in the cable · CPC title

• H01B7/14 Primary

  Submarine cables · CPC title

• H01B3/30

  plastics; resins; waxes · CPC title

• H01B7/282 Primary

  Preventing penetration of fluid {, e.g. water or humidity,} into conductor or cable · CPC title