Product Description
Aluminum alloy special-shaped wire is made of aluminum alloy material as a conductor. Through special processing technology, the cross-section of the wire is made into a non-circular wire, such as trapezoid, special-shaped isosceles trapezoid, etc. Compared with traditional circular wires, it has better electrical performance, mechanical performance, and space utilization.
Generally composed of multiple aluminum alloy single wire wires twisted in concentric layers. Except for the center of the twisted wire, each layer is made up of multiple special-shaped aluminum alloy single wire conductors twisted together in a concentric manner. The cross-section of the special-shaped aluminum alloy single wire conductor is a special-shaped isosceles trapezoid, which is replaced by a circular arc isosceles trapezoid with a long base. The intersection point of the center of the circular arc and the extension line of the waistline of the special-shaped isosceles trapezoid coincides.
High strength: Aluminum alloy material itself has high strength. After special processing technology, the tensile strength of the core of the special-shaped wire is further improved, which can withstand greater tension and is suitable for large-span overhead transmission lines.
Good conductivity: Although the conductivity of aluminum alloy is slightly lower than that of pure aluminum, through reasonable alloy composition design and processing technology, the conductivity of aluminum alloy shaped wires can meet the requirements of power transmission, and under the same current carrying capacity, their weight is much lighter than copper wires.
Sag: Determine the appropriate sag based on factors such as the span of the line, the weight of the conductor, and tension to ensure the safe operation of the conductor under different climatic conditions. Generally speaking, the larger the span, the greater the sag.
Tension: During the installation process, it is necessary to control the tension of the wire to avoid damage caused by excessive tension or excessive sag caused by insufficient tension. The tension control range of aluminum alloy special-shaped wires is usually between 40% and 60% of their rated tensile strength.
It is the main application field of aluminum alloy shaped wires, which can be used for urban overhead lines, rural overhead lines, cross regional transmission lines, etc., and can effectively improve the efficiency and reliability of power transmission.
In special environments such as coastal areas, desert areas, and high-altitude areas, the corrosion resistance, high temperature resistance, and low temperature resistance of aluminum alloy shaped wires can better adapt to environmental requirements and ensure the stability of power supply.
In the process of renovating and upgrading the existing power grid, aluminum alloy special-shaped wires can utilize their good performance to improve the transmission capacity and reliability of the line without changing the original tower structure, and reduce the cost of renovation.
|
Nominal Cross Section |
Center Wire |
Conductor Structure |
First Layer |
Second Layer |
Third Layer |
Fourth Layer |
Control Cross Section (mm²) |
Weight per Meter |
Standard resistance |
Resistance before annealing |
|||||
|
mm |
mm |
Compression mold |
Pitch |
Compression mold |
Pitch |
Compression mold |
Pitch |
Compression mold |
Pitch |
≤g/m |
≤Ω/km |
≤Ω/km |
|||
|
25 |
2.5 |
6/1+5 |
5.6 |
90-105 |
|
|
|
|
|
|
24 |
65 |
1.2 |
1.23 |
|
|
35 |
2.54 |
6/1+5 |
6.56 |
100-120 |
|
|
|
|
|
|
33.5 |
90.8 |
0.868 |
0.8897 |
|
|
50 |
2.54 |
7/1+6 |
7.61 |
120-138 |
|
|
|
|
|
|
45 |
122 |
0.641 |
0.657 |
|
|
70 |
2.5 |
14/1+5+8 |
5.6 |
100-120 |
9.1 |
145-165 |
|
|
|
|
65 |
176.2 |
0.443 |
0.4541 |
|
|
95 |
2.54 |
16/1+5+10 |
6.56 |
120-150 |
10.78 |
170-195 |
|
|
|
|
90.5 |
245.3 |
0.32 |
0.328 |
|
|
120 |
2.54 |
18/1+6+11 |
7.61 |
130-160 |
12.1 |
185-215 |
|
|
|
|
114 |
308.9 |
0.253 |
0.2593 |
|
|
150 |
2.54 |
17/1+6+10 |
7.61 |
130-170 |
13.4 |
215-240 |
|
|
|
|
141 |
382.1 |
0.206 |
0.2112 |
|
|
185 |
2.54 |
30/1+5+10+14 |
6.56 |
120-150 |
10.78 |
160-185 |
15 |
240-270 |
|
|
177 |
479.7 |
0.164 |
0.1681 |
|
|
240 |
2.54 |
33/1+6+11+15 |
7.61 |
140-170 |
12.13 |
175-215 |
17.2 |
270-300 |
|
|
231.5 |
627.4 |
0.125 |
0.1281 |
|
|
300 |
2.54 |
31/1+6+10+14 |
7.61 |
140-170 |
13.48 |
200-235 |
19.2 |
300-330 |
|
|
290 |
785.9 |
0.1 |
0.1025 |
|
|
400 |
2.54 |
53/1+6+11+15+20 |
7.61 |
160-200 |
12.13 |
225-265 |
17.25 |
300-335 |
21.8 |
350-385 |
373.5 |
1012.2 |
0.0778 |
0.0797 |
|
|
500 |
2.54 |
53/1+6+10+14+22 |
7.61 |
160-200 |
13.48 |
235-275 |
19.25 |
310-355 |
24.73 |
380-420 |
480 |
1300.8 |
0.0605 |
0.062 |
|
|
Process Requirements: 1. Conductor wires from the previous process must be cross-checked to avoid misusing single-filament conductors. Pay attention to tension control during wire drawing to avoid underdrawing the single-filament conductor, which could result in excessive DC resistance. 2. Conductor structure, lay direction, and spacing must meet process requirements. The strands must be tightly twisted, with the outermost layer twisted to the left, and adjacent layers twisted in opposite directions. The conductor surface must be smooth, flat, and free of oil and dirt. Broken strands, cracks, and mechanical damage are prohibited. 3. Welding of single strands of wired conductors is permitted, but the distance between two joints in the same layer must be no less than 300m. The distance between two joints on the same wire must be no less than 15m, and the joints must be smooth and rounded. 4. Wire drawing must be neat and uniform, with the outermost layer of wire drawing no less than 50m from the edge of the reel. 5. Strictly follow the process to ensure that the conductor's electrical resistance, weight, and outer diameter meet the requirements before continuing production. |
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