Product Description
Aluminum conductor with profile wire is a power transmission wire made by drawing high-purity aluminum into a non-circular cross-section single wire through a special mold, and then using concentric twisting technology. Its core advantage lies in optimizing the cross-sectional structure, solving the problems of large gaps and low space utilization in traditional circular wires, adapting to the demand for "compactness" and "low loss" in medium and high voltage power transmission, and widely used in power grid construction and special power scenarios.
Monofilament structure: The cross-section of a single filament is designed in a non-circular shape, with common types including trapezoidal, fan-shaped, Z-shaped, and semi-circular. Among them, trapezoidal and fan-shaped are the most widely used.
Twisting method: Adopting a concentric layer twisting structure, irregular single wires are arranged layer by layer from the center to the outside. The number of single wires in the outer layer increases with the increase of cross-section, and the twisting pitch is smaller than that of circular wires, reducing single wire slip.
High space utilization: The gap between twisted irregular single wires is only 3% -5%, and the conductive cross-sectional area under the same outer diameter is 10% -15% larger than that of round wires, which can improve transmission capacity.
Lightweight: the density of aluminum material is only 2.7 g/cm ³, and the weight is more than 60% lighter than that of copper conductor under the same transmission capacity, reducing tower load and erection cost.
Good ductility: Pure aluminum monofilament has excellent ductility and is not easily broken during the drawing and twisting process. It is suitable for complex section processing and maintains a certain degree of flexibility even in low temperature environments.
DC resistance: decreases with increasing cross-section, and due to high cross-section utilization, the resistance is 5% -8% lower than that of a circular wire at the same nominal cross-section.
Corona performance: Under 110kV voltage, the corona noise on rainy days is ≤ 50dB, which is 8-10dB lower than that of circular wires, reducing electromagnetic interference to the surrounding environment.
Installation temperature: The recommended construction temperature is -5 ℃~40 ℃. When it is below -5 ℃, the wire should be preheated to avoid single wire brittleness.
Maximum allowable tension: The construction tension shall not exceed 35% of the minimum failure load to prevent cross-sectional deformation from affecting conductivity.
Urban high-voltage distribution network: 110kV-220kV urban peripheral transmission line, compact cross-section suitable for narrow installation space, low corona loss reduces interference to surrounding residential areas.
In the field of special cables: as the core of high-voltage cables and dense bus duct conductors, the compact structure reduces the outer diameter of cables, making it convenient for pipe laying and equipment integration.
High altitude area line: In high-altitude environments, the low corona loss characteristic can avoid the exacerbation of corona caused by thin air, ensuring stable operation of the line.
|
Nominal Cross Section |
Center Wire |
Conductor Structure |
First layer |
Second layer |
Third layer |
Fourth layer |
Control cross section (mm/sup2) |
Weight per meter |
Standard resistance |
Internal control resistance |
|||||
|
mm |
mm |
Compression mold |
Pitch |
Compression mold |
Pitch |
Compression mold |
Pitch |
Compression mold |
Pitch |
≤g/m |
≤Ω/km |
||||
|
25 |
2.5 |
6/1+5 |
5.6 |
90-105 |
|
|
|
|
|
|
24 |
64.8 |
1.2 |
1.176 |
|
|
35 |
2.54 |
6/1+5 |
6.56 |
100-120 |
|
|
|
|
|
|
33.5 |
90.5 |
0.868 |
0.8506 |
|
|
50 |
2.54 |
7/1+6 |
7.61 |
120-138 |
|
|
|
|
|
|
45.2 |
122 |
0.641 |
0.6282 |
|
|
70 |
2.5 |
14/1+5+8 |
5.6 |
100-120 |
9.15 |
145-165 |
|
|
|
|
66.3 |
179 |
0.443 |
0.4341 |
|
|
95 |
2.54 |
16/1+5+10 |
6.56 |
120-150 |
10.78 |
170-195 |
|
|
|
|
91 |
245.7 |
0.32 |
0.3152 |
|
|
120 |
2.54 |
18/1+6+11 |
7.61 |
130-160 |
12.13 |
185-215 |
|
|
|
|
114 |
307.8 |
0.253 |
0.2492 |
|
|
150 |
2.54 |
17/1+6+10 |
7.61 |
130-170 |
13.48 |
215-240 |
|
|
|
|
141 |
380.7 |
0.206 |
0.2029 |
|
|
185 |
2.54 |
30/1+5+10+14 |
6.56 |
120-150 |
10.78 |
160-185 |
15.04 |
240-270 |
|
|
179 |
483.3 |
0.164 |
0.1615 |
|
|
240 |
2.54 |
33/1+6+11+15 |
7.61 |
140-170 |
12.13 |
175-215 |
17.2 |
270-300 |
|
|
231.5 |
625.1 |
0.125 |
0.1231 |
|
|
300 |
2.54 |
31/1+6+10+14 |
7.61 |
140-170 |
13.48 |
200-235 |
19.25 |
300-330 |
|
|
291 |
785.7 |
0.1 |
0.099 |
|
|
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 |
1007.1 |
0.0778 |
0.077 |
|
|
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 |
1296 |
0.0605 |
0.0599 |
|
|
Process Requirements: 1. Conductor wires from the previous process must be cross-checked to avoid misusing single-filament conductors. When stranding, pay attention to tension control to avoid understretching the single-filament conductors, which could result in excessive DC resistance. 2. Conductor structure, lay direction, and lay pitch 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. There must be no broken strands, cracks, or mechanical damage. 3. Soldering of stranded conductors is permitted, but the distance between joints within a layer must be no less than 300mm, and the distance between joints within the same single wire must be no less than 15m. Joints must be smooth and rounded. 4. Stranded wire must be arranged neatly and evenly, with the outermost layer of the strands at least 50mm from the edge of the reel. 5. Strictly follow the process to ensure that the conductor resistance, weight per meter, and outer diameter meet the requirements before continuing production. |
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