# US 2021/0280339 A1 · Armoured power cable

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- Number: US 2021/0280339 A1
- Document ID: US20210280339A1
- Status: Published application
- Kind: A1
- Application number: 17/163,223
- Filed: 2021-01-29
- Published: 2021-09-09
- Earliest claimed: 2020-01-31
- Assignees: Prysmian S.p.A.
- Applicants: Prysmian S.P.A.
- Inventors: Paolo MAIOLI; Rodolfo SICA
- Web page: https://patentgrep.com/patent/US20210280339A1

## CPC

- H01B 7/226: {Helicoidally wound metal wires or tapes}
- H01B 7/2806: {Protection against damage caused by corrosion}
- C22C 21/16: with magnesium
- H01B 7/1875: {Multi-layer sheaths}
- H01B 9/00: Power cables
- H01B 7/14: Submarine cables
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

An armoured power cable is disclosed. The cable includes: at least one core comprising an electric conductor; and an armour surrounding the core, wherein the amour comprises at least one layer made of a metallic material having a tensile strength of at least 400 MPa and showing a weight loss from 0.01% to 0.1% after 30 days of exposure to a corrosive solution according to ASTM G3172 (2004). The cable has mechanical properties suitable for its handling and installation, for example, underwater, and its armour can be at least partially degraded over time after installation due to corrosion exerted by corrosive agents present in the installation environment, without impairing the mechanical properties of the other cable portions and without impairing its electric performance.

## Claims

### Claim 1

An armoured power cable comprising:
at least one core including an electric conductor; and
an armour surrounding the at least one core, wherein the armour includes at least one layer made of a metallic material having a tensile strength of at least 400 MPa and weight loss from 0.01% to 0.1% after 30 days of exposure to a corrosive solution according to ASTM G3172 (2004).

### Claim 2 (depends on 1)

The armoured power cable according to claim 1, wherein the metallic material of the at least one layer of the armour has a tensile strength of 800 MPa at most.

### Claim 3 (depends on 1)

The armoured power cable according to claim 1, wherein the metallic material of the at least one layer of the armour has an elongation at break of at least 10%.

### Claim 4 (depends on 1)

The armoured power cable according to claim 1, wherein the metallic material of the at least one layer of the armour has an elongation at break of 25% at most.

### Claim 5 (depends on 1)

The armoured power cable according to claim 1, wherein the at least one layer of the armour includes elongated tensile elements helically wound around the at least one core.

### Claim 6 (depends on 1)

The armoured power cable according to claim 1, wherein the metallic material forming the at least one layer of the armour is an aluminium alloy.

### Claim 7 (depends on 6)

The armoured power cable according to claim 6, wherein the aluminium alloy is an aluminium-copper alloy.

### Claim 8 (depends on 7)

The armoured power cable according to claim 7, wherein the aluminium-copper alloy has a copper content in a range from about 0.5% to about 7% by weight on a total weight of the alloy.

### Claim 9 (depends on 8)

The armour power cable according to claim 8, wherein the aluminium-copper alloy is a 2-xxx series aluminium alloy.

### Claim 10 (depends on 1)

The armoured power cable according to claim 1, wherein the armoured power cable is a three phase power transmission cable, and the at least one core includes three single-phase cores for transporting alternate current.