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| Aluminum Stranded Conductor (AAC) Specifications | |||||||
|---|---|---|---|---|---|---|---|
| Code Name | Sectional Area (mm²) |
Wire Diameter & Stranding | Diameter of Conductor (mm) |
Nominal Breaking Load (kN) |
Linear Mass (kg/km) |
Maximum Resistance at 20℃ (Ω/km) |
|
| Dia. (mm) | No. | ||||||
| 10 | 10.0 | 1.35 | 7 | 4.05 | 1.95 | 27.4 | 2.8633 |
| 16 | 16.1 | 1.71 | 7 | 5.13 | 3.04 | 44.0 | 1.7896 |
| 25 | 24.9 | 2.13 | 7 | 6.39 | 4.5 | 68.3 | 1.1453 |
| 40 | 40.1 | 2.7 | 7 | 8.1 | 6.8 | 109.8 | 0.7158 |
| 63 | 63.2 | 3.39 | 7 | 10.17 | 10.39 | 173.0 | 0.4545 |
| 100 | 100.1 | 2.59 | 19 | 12.95 | 17 | 275.4 | 0.2877 |
| 125 | 124.6 | 2.89 | 19 | 14.45 | 21.25 | 343.0 | 0.2302 |
| 160 | 159.6 | 3.27 | 19 | 16.35 | 26.4 | 439.1 | 0.1798 |
| 200 | 199.9 | 3.66 | 19 | 18.3 | 32 | 550.0 | 0.1439 |
| 250 | 249.6 | 4.09 | 19 | 20.45 | 40 | 686.9 | 0.1151 |
| 315 | 314.5 | 3.29 | 37 | 23.03 | 51.97 | 867.6 | 0.0916 |
| 400 | 400.0 | 3.71 | 37 | 25.97 | 64 | 1103.2 | 0.0721 |
| 450 | 451.1 | 3.94 | 37 | 27.58 | 72 | 1244.2 | 0.0641 |
| 500 | 500.5 | 4.15 | 37 | 29.05 | 80 | 1380.4 | 0.0577 |
| 560 | 560.0 | 4.39 | 37 | 39.51 | 89.6 | 1544.7 | 0.0515 |
| 630 | 631.3 | 3.63 | 61 | 32.67 | 100.8 | 1743.6 | 0.0458 |
| 710 | 710.1 | 3.85 | 61 | 34.65 | 113.6 | 1961.3 | 0.0407 |
| 800 | 801.4 | 4.09 | 61 | 36.81 | 128 | 2213.5 | 0.0361 |
| 900 | 898.2 | 4.33 | 61 | 47.63 | 144 | 2480.9 | 0.0321 |
| 1000 | 1000.6 | 4.57 | 61 | 50.27 | 160 | 2763.5 | 0.0289 |
| 1120 | 1120.8 | 3.96 | 91 | 43.56 | 179.2 | 3110.1 | 0.0258 |
| 1250 | 1248.8 | 4.18 | 91 | 45.98 | 200 | 3465.2 | 0.0231 |
| 1400 | 1402.6 | 4.43 | 91 | 48.73 | 224 | 3892.1 | 0.0207 |
| 1500 | 1499.2 | 4.58 | 91 | 50.38 | 240 | 4160.2 | 0.0193 |
Note: The outermost layer is twisted to the right (Z).
Frequently Asked Questions (FAQ)
What is an Aluminum Stranded Conductor (AAC)?
AAC (All Aluminum Conductor) is a refined aluminum stranded conductor with a minimum metal purity of 99.7%. It is widely used in overhead electricity distribution lines and busbars in substations due to its excellent electrical conductivity and corrosion resistance.
What does the "Z-twist" note mean for AAC conductors?
The Z-twist indicates that the outermost layer of the stranded aluminum wires is wound in a right-hand lay (clockwise direction). This standard layout ensures structural integrity, mechanical stability, and compatibility during splicing and hardware installation.
How do I choose the correct AAC conductor size?
Selecting the right size depends on your project's current-carrying capacity (ampacity) requirements, allowable maximum electrical resistance at 20℃, mechanical span length, and nominal breaking load. Refer to the specification table above to match your sectional area and structural requirements.
Can AAC conductors be used for long-span overhead lines?
AAC conductors have a high conductivity-to-weight ratio but relatively low tensile strength. Therefore, they are primarily preferred for shorter spans and urban distribution systems rather than long-span high-voltage transmission lines, where ACSR (steel-reinforced) is typically used.
What is the relationship between temperature and AAC resistance?
The electrical resistance values provided in the table are calibrated at the standard reference temperature of 20℃. As the operating temperature of the conductor increases during power transmission, the electrical resistance will also increase, which should be factored into your line loss calculations.