Electrical Conductor for Transporting Electrical Energy and Corresponding Production Method

• US 20130264093A1
• Filed: 01/24/2012
• Published: 10/10/2013
• Est. Priority Date: 01/24/2011
• Status: Abandoned Application

• Current Assignee: LA Farga Lacambra, S.A.U.
• Original Assignee: LA Farga Lacambra, S.A.U.
• Inventors: Fontana, Lluis Riera, Crusellas, Nuria Ferrer, Zamora, Miquel Garcia, Arderiu, Oriol Guixa, Marsa, Cristina Garcia, Alvarez, Ferran Espiell
• Application Number:
  US13/825,154
• Publication Number:
  US 20130264093A1
• Time in Patent Office: Days
• US Class Current: 174/113.R
• CPC Class Codes: C22C 21/00 Alloys based on aluminium
• CPC Class Codes: C22C 21/08 with silicon
• CPC Class Codes: C22C 9/00 Alloys based on copper
• CPC Class Codes: C22C 9/02 with tin as the next major constituent
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: C22F 1/05 of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
• CPC Class Codes: C22F 1/08 of copper or alloys based thereon
• CPC Class Codes: D07B 1/147 comprising electric conductors or elements for information transfer D07B1/145 takes precedence
• CPC Class Codes: D07B 2205/2071 Fluor resins
• CPC Class Codes: D07B 2801/18 Coating
• CPC Class Codes: H01B 1/023 Alloys based on aluminium
• CPC Class Codes: H01B 1/026 Alloys based on copper
• CPC Class Codes: H01B 3/025 Other inorganic material
• CPC Class Codes: H01B 3/445 from vinylfluorides or other fluoroethylenic compounds
• CPC Class Codes: H01B 5/08 Several wires or the like stranded in the form of a rope
• CPC Class Codes: H01B 7/14 Submarine cables
• CPC Class Codes: H01B 7/30 with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
• CPC Class Codes: H01B 7/303 Conductors comprising interwire insulation

Abstract

An electrical conductor for transmission of electrical power, having a total cross-section equal to or above 10 mm² and comprising a plurality of stranded filamentary members, where at least one of the filamentary members is made from microalloyed copper or microalloyed aluminium having annealing temperatures higher than 250° C., and has the side surface thereof totally coated with a fluorinated polymer. The conductor has a better behavior relative to the skin effect and allows operation at high temperatures. Furthermore, if the electrical conductor is suspended, it has a smaller sag and prevents or reduces the accumulation of ice and/or snow.

Claims

1. An electrical conductor for the transmission of electrical power, where said conductor has a total cross section equal to or more than 10 mm² and comprises a plurality of stranded filamentary members wherein at least one of said filamentary members is made from unannealed microalloyed copper, with a minimum copper content of 98 wt %, or from unannealed microalloyed aluminum, with a minimum aluminum content of 90 wt %, and has its side surface totally coated with a fluorinated polymer.

2. The electrical conductor according to claim 1, wherein it is a stranded electrical conductor having wires of circular, trapezoidal and/or triangular cross section, without a tubular core.

3. The electrical conductor according to claim 1, wherein it is formed by wires of circular cross section having a diameter of between 0.3 mm and 5 mm.

4. The electrical conductor according to claim 1, wherein it has a plurality of filamentary members coated with fluorinated polymer, where said coated filamentary members are distributed in such a way that each of the filamentary members not coated with fluorinated polymer is only in contact with filamentary members coated with fluorinated polymer.

5. The electrical conductor according to claim 1, wherein all the external filamentary members thereof have their side surface totally coated with said fluorinated polymer.

6. The electrical conductor according to claim 1, wherein said microalloyed copper has an annealing temperature higher than the curing temperature of said fluorinated polymer.

7. The electrical conductor according to claim 1, wherein said microalloyed copper has an annealing temperature of above 250°

C.

8. The electrical conductor according to claim 1, wherein the composition of said microalloyed copper comprises the following weight percentages:

Zn;

0.001-0.015

Pb;

0.005-0.050

Sn;

0.005-0.600

Ni;

0.002-0.050

As;

0.001-0.005

Sb;

0.001-0.010

Ag;

0.002-0.012

Mg<

0.4

9. The electrical conductor according to claim 1, wherein said microalloyed aluminum has an annealing temperature higher than the curing temperature of said fluorinated polymer.

10. The electrical conductor according to claim 1, wherein said microalloyed aluminum has an annealing temperature of above 250°

C.

11. The electrical conductor according to claim 1, wherein the composition of said microalloyed aluminum comprises the following weight percentages

Ag≦

0.020

As≦

0.010

Fe≦

0.800

Ni≦

0.015

Mg≦

0.900

Pb≦

0.020

Si≦

0.900

Ti≦

1.800

Zr≦

0.900

Zn≦

0.020

Se≦

0.010

Te≦

0.010

where the sum of the percentages of these components is at least 0.25 wt % of the total alloy.

12. The electrical conductor according to claim 1, wherein the composition of said microalloyed aluminum comprises the following weight percentages:

Mg;

0.60-0.90

Si;

0.55-0.85

Al;

rest

13. The electrical conductor according to claim 1, wherein the composition of said microalloyed aluminum comprises the following weight percentages

Zr:

0.15-0.25

Fe;

0.1-0.2

Zn;

0.01-0.015

Ti;

0.005

Al;

rest

14. The electrical conductor according to claim 1, wherein said fluorinated polymer is polytetrafluoroethylene or a derivative thereof.

15. The electrical conductor according to claim 1, wherein said fluorinated polymer is polytetrafluoroethylene with heat resistant resins.

16. The electrical conductor according to claim 1, wherein the thickness of the dry film of said fluorinated polymer is comprised between 10 and 35 microns.

17. The conductor according to claim 1, wherein all the filamentary members thereof are made from microalloyed copper.

18. The conductor according to claim 1, wherein all the filamentary members thereof are made from microalloyed aluminum.

19. A process for the manufacture of an electrical conductor for the transmission of electrical power according to claim 1, wherein it comprises a step of coating at least one of said filamentary members with a fluorinated polymer and subsequent stranding of said electrical conductor.

20. The process according to claim 19, wherein said coating step includes a step of applying said fluorinated polymer by spraying, dipping or impregnation by means of rollers, and a curing step of said fluorinated polymer at a temperature of above 200°

C., preferably above 220°

C.

21. An overhead power line for the transmission of electrical power, wherein it comprises at least one conductor according to claim 1.

22. A submarine cable for the transmission of electrical power, wherein it comprises at least one conductor according to claim 1.