Electrical conductor for aeronautical applications

Abstract

A stranded electrical conductor includes a single center strand in aluminum or aluminum alloy (10, 20, 30, 40A, 50A) and a plurality of conductor strands (11, 21, 31, 41, 51) arranged in at least one layer around said center strand. The relation between the diameter of said center strand in aluminum or aluminum alloy and the diameter of said peripheral conductor strands is greater than or equal to 3.

Claims

1. A stranded electrical conductor being AWG between 16 and 30, comprising: a single center strand in aluminum or aluminum alloy and the plurality of conductor strands arranged around a center strand, the diameter of all said peripheral conductor strands is substantially identical, wherein the relation between the diameter of said strand in aluminum or aluminum alloy and the diameter of said peripheral conductor strands is 3, said peripheral conductor strands being in contact two-by-two and twelve in number.

2. The conductor as claimed in claim 1, wherein said peripheral conductor strands are in copper or copper alloy.

3. The conductor as claimed in claim 1, wherein at least one of said peripheral conductor strands consists of at least one layer of copper and one layer of silver-plated copper alloy, whose mass ratio of silver is between 0.1% and 0.5%.

4. The electrical conductor as claimed in claim 1, wherein said strands are coated with a protective layer vis--vis corrosion.

5. The electrical conductor as claimed in claim 4, wherein said protective layer is a layer of nickel.

6. An electric cable comprising at least one conductor as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is described below in more detail with the help of the figures, showing only preferred embodiments of the invention.

(2) FIG. 1 is a view in transverse section of a first embodiment of the invention.

(3) FIG. 2 is a view in transverse section of a second embodiment of the invention.

(4) FIG. 3 is a view in transverse section of a third embodiment of the invention.

(5) FIG. 4 is a view in transverse section of a fourth embodiment of the invention.

(6) FIG. 5 is a view in transverse section of a fifth embodiment of the invention.

DETAILED DESCRIPTION

(7) The conductor shown on FIG. 1 is AWG between 16 and 30 and comprises a single center strand 10 in aluminum or aluminum alloy and a plurality of strands 11 in copper or copper alloy arranged around said center strand. The relation between the diameter of the strand in aluminum or aluminum alloy and the diameter of the peripheral strands in copper or copper alloy is 3, said peripheral strands in copper or copper alloy being in contact two-by-two and twelve in number. The relation between the cross section of the strand in aluminum or aluminum alloy and the cross section of the peripheral strands in copper or copper alloy is 43%.

(8) More precisely, the characteristics of the strands according to AWG are specified in table 1 below.

(9) TABLE-US-00002 TABLE 1 Al/Al alloy strands Cu/Cu alloy strands Wire Cross section Wire Cross section AWG Number mm mm.sup.2 Number mm mm.sup.2 30 1 0.191 0.029 12 0.0635 0.038 28 1 0.236 0.044 12 0.0785 0.058 26 1 0.3 0.071 12 0.1 0.094 24 1 0.345 0.093 12 0.115 0.125 22 1 0.48 0.181 12 0.16 0.241 20 1 0.609 0.291 12 0.203 0.388 18 1 0.762 0.456 12 0.254 0.608 16 1 0.9 0.636 12 0.3 0.848

(10) The conductor shown on FIG. 2 is AWG 12 or 14 and comprises a single center strand 20 in aluminum or aluminum alloy and a plurality of strands 21 in copper or copper alloy arranged around said center strand. The relation between the diameter of the strand in aluminum or aluminum alloy and the diameter of the peripheral strands in copper or copper alloy is 5, said peripheral strands in copper or copper alloy being in contact two-by-two and eighteen in number. The relation between the cross section of the strand in aluminum or aluminum alloy and the cross section of the peripheral strands in copper or copper alloy is 58%.

(11) More precisely, the characteristics of the strands according to AWG are specified in table 2 below.

(12) TABLE-US-00003 TABLE 2 Al/Al alloy strands Cu/Cu alloy strands Wire Cross section Wire Cross section AWG Number mm mm.sup.2 Number mm mm.sup.2 14 1 1.250 1.227 18 0.25 0.884 12 1 1.600 2.011 18 0.32 1.448

(13) The conductor shown on FIG. 3 is AWG 12 or 14 and comprises a single center strand 30 in aluminum or aluminum alloy and a plurality of strands 31 in copper or copper alloy arranged around said center strand. The relation between the diameter of the strand in aluminum or aluminum alloy and the diameter of the peripheral strands in copper or copper alloy is 3, said peripheral strands in copper or copper alloy being in contact two-by-two and arranged in two layers of twelve and eighteen strands. The relation between the cross section of the strand in aluminum or aluminum alloy and the cross section of the peripheral strands in copper or copper alloy is 23%.

(14) More precisely, the characteristics of the strands according to AWG are specified in table 3 below.

(15) TABLE-US-00004 TABLE 3 Al/Al alloy strands Wire Cross section AWG Number mm mm.sup.2 14 1 0.750 0.442 12 1 0.960 0.724 Cu/Cu alloy strands Number Wire Cross section Number Wire Cross section AWG Layer 1 mm mm.sup.2 Layer 2 mm mm.sup.2 14 12 0.250 0.589 18 0.25 0.884 12 12 0.320 0.965 18 0.32 1.448

(16) The conductor shown on FIG. 4 is AWG 12 or 14 and comprises a layer of six strands 40B in aluminum on a center strand 40A and a plurality of strands 41 in copper or copper alloy arranged in a single layer around said center strands. The relation between the diameter of the strands in aluminum or aluminum alloy and the diameter of the peripheral strands in copper or copper alloy is 1.67, said peripheral strands in copper or copper alloy being in contact two-by-two and eighteen in number. The relation between the cross section of the strands in aluminum or aluminum alloy and the cross section of the peripheral strands in copper or copper alloy is 52%.

(17) More precisely, the characteristics of the strands according to AWG are specified in table 4 below.

(18) TABLE-US-00005 TABLE 4 Al/Al alloy strands Number Wire Cross section Number Wire Cross section AWG Core mm mm.sup.2 Layer 1 mm mm.sup.2 14 1 0.417 0.136 6 0.417 0.818 12 1 0.533 0.223 6 0.533 1.340 Cu/Cu alloy strands Wire Cross section AWG Number mm mm.sup.2 14 18 0.25 0.884 12 18 0.32 1.448

(19) The conductor shown on FIG. 5 is AWG 12 or 14 and comprises a layer of twelve strands 50B in aluminum on the center strand 50A and a plurality of strands 51 in copper or copper alloy arranged in a single layer around said center strands. The relation between the diameter of the center strand 50A in aluminum or aluminum alloy and the diameter of the peripheral strands in copper or copper alloy is 3, said peripheral strands in copper or copper alloy being in contact two-by-two and eighteen in number.

(20) The relation between the cross section of the strands in aluminum or aluminum alloy 50A and 50B in aluminum or aluminum alloy and the cross section of the peripheral strands in copper or copper alloy is 54%. As for the relation between diameter of the center strand 50A in aluminum or aluminum alloy and the diameter of the layer of strands in aluminum or aluminum alloy surrounding it, it is also 3.

(21) More precisely, the characteristics of the strands according to AWG are specified in table 5 below.

(22) TABLE-US-00006 TABLE 5 Al/Al alloy strands Number Wire Cross section Number Wire Cross section AWG Core mm mm.sup.2 Layer 1 mm mm.sup.2 14 1 0.750 0.442 12 0.250 0.589 12 1 0.960 0.724 12 0.320 0.965 Cu/Cu alloy strands Wire Cross section AWG Number mm mm.sup.2 14 18 0.25 0.884 12 18 0.32 1.448

(23) In every case, the conductor strands are arranged together such that the circular cross section of the conductor is as circular as possible. In effect, such a conductor is easy to handle. Furthermore, its flexing behavior is identical, whatever the direction of flexion. It is therefore easier to deploy and connect in order to make an electrical connection between different devices.