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| Type: | Bare |
| Conductor Type: | Stranded |
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AAAC stands for All Aluminium Alloy Conductor. It is a type of concentric-lay-stranded overhead conductor made entirely from aluminium alloy wires, typically 6201-T81 (Al-Mg-Si alloy). AAAC is known for its superior strength-to-weight ratio, better corrosion resistance, and higher conductivity compared to ACSR (Aluminium Conductor Steel Reinforced).
AAAC is widely used in power distribution and transmission where high strength, low weight, and corrosion resistance are important.
AAAC conductors are primarily used in:
| Application Area | Purpose |
|---|---|
| Overhead power transmission lines | For medium and high voltage transmission systems |
| Urban and coastal areas | Where corrosion resistance is critical |
| Distribution lines | For long spans due to high strength and light weight |
| Renewable energy networks | Used in wind and solar farm transmission |
| Replacement of ACSR | Where lower line losses and improved durability are desired |
No steel core = no galvanic corrosion
Lighter = easier handling and installation
Better sag characteristics at elevated temperatures
| Component | Details |
|---|---|
| Conductor | Concentric lay stranded aluminium alloy wires (typically 6201-T81 alloy) |
| Stranding | Similar to ACSR/ACSR/AAC: 7, 19, 37, or more wires in multiple layers |
| Coating | No additional coating; relies on the aluminium alloy's corrosion resistance |
| Color | Metallic grey |
6201-T81 Aluminium-Magnesium-Silicon Alloy
Higher strength and better corrosion resistance than EC-grade aluminium
| Property | Value Range (Approximate) |
|---|---|
| Electrical Conductivity | ~52.5-53% IACS (lower than AAC, higher than ACSR) |
| Tensile Strength | Higher than AAC, lower than ACSR |
| Temperature Rating | Typically up to 90°C continuous, 150°C short-circuit |
| Density | ~2.7 g/cm³ |
| Resistance to Corrosion | High |
AAAC conductors conform to the following international and regional standards:
| Standard | Description |
|---|---|
| IEC 61089 | Overhead electrical conductors - AAAC construction and properties |
| ASTM B399 / B399M | Standard Specification for Concentric-Lay-Stranded 6201-T81 AAAC |
| BS EN 50182 | Conductors for overhead lines - AAAC types and mechanical properties |
| IS 398 (Part 4) (India) | Indian standard for AAAC conductors |
| CSA C49 (Canada) | Overhead electrical conductors - includes AAAC |
Better corrosion resistance (especially in coastal/industrial areas)
Lighter than ACSR - less sag and easier to install
Good mechanical strength without the need for a steel core
Lower power losses due to better conductivity than ACSR
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