Electric sector cables

Patent metadata

Field	Value
Publication number	US-9647436-B2
Application number	US-201013883705-A
Country	US
Kind code	B2
Filing date	Nov 17, 2010
Priority date	Nov 17, 2010
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A high voltage electric cable having a longitudinal axis may include: a conductive core having a first cross sectional area; wherein the conductive core includes a solid, central conductor, and at least three solid, sector conductors stranded around the central conductor. The central conductor may have a second cross sectional area. A ratio of the second cross sectional area to the first cross sectional area may be of from 1/130 to 1/20.

First claim

The invention claimed is:

1. A high voltage electric cable having a longitudinal axis, the cable comprising:
a solid conductive core having a first cross sectional area;
wherein the solid conductive core comprises:
a solid, central conductor; and
at least three solid, sector conductors stranded around the central conductor;

wherein every sector conductor of the cable directly rests against the central conductor,
wherein the central conductor has a second cross sectional area,
wherein a ratio of the second cross sectional area to the first cross sectional area is from 1/130 to 1/20,
wherein the first cross sectional area is greater than 1,000 square millimeters (mm 2 ) and less than 4,000 mm 2 , and
wherein a stranding step of the sector conductors is of from 1,200 millimeters (mm) to 1,800 mm.

2. The cable of claim 1 , wherein the ratio of the second cross sectional area to the first cross sectional areas is from 1/65 to 1/20.

3. The cable of claim 1 , wherein the ratio of the second cross sectional area to the first cross sectional areas is from 1/65 to 1/25.

4. The cable of claim 1 , wherein the central conductor and the sector conductors are made of aluminum.

5. The cable of claim 1 , wherein each one of the sector conductors rests against adjacent sector conductors.

6. The cable of claim 1 , wherein all of the sector conductors have a same size and shape.

7. The cable of claim 1 , wherein the conductive core comprises up to nine sector conductors.

8. The cable of claim 1 , wherein the central conductor has a circular cross section.

9. The cable of claim 1 , wherein each one of the sector conductors has a cross section with a substantially trapezoidal shape, and
wherein the cross section has a major basis, a minor basis, a first side, and a second side.

10. The cable of claim 9 , wherein the major basis is an arc of a circle.

11. The cable of claim 9 , wherein the first side has a blocking recess, and
wherein the second side has a blocking tooth whose shape and size matches a shape and size of the blocking recess.

12. The cable of claim 1 , further comprising:
water blocking material.

13. The cable of claim 1 , wherein the cable is a submarine cable.

Assignees

• Miramonti Gianni
• Montagner Sergio
• Prysmian Spa

Inventors

• Miramonti Gianni
• Montagner Sergio

Classifications

• H01B9/006 Primary

  Constructional features relating to the conductors · CPC title

• H02G9/00 Primary

  Installations of electric cables or lines in or on the ground or water · CPC title

• H01B7/14

  Submarine cables · CPC title