AAAC-630 All Aluminum Alloy Stranded Overhead Conductor
AAAC-630 (630 mm² nominal area) is an all-aluminum-alloy stranded conductor used on overhead distribution and sub-transmission lines where mechanical span loading rules out plain AAC but corrosion concerns rule out steel reinforcement. The 6201-T81 alloy roughly doubles the tensile strength of pure aluminum.
Technical Specifications
| Conductor type | AAAC — All Aluminum Alloy Conductor |
| Alloy | AA-6201-T81 |
| Nominal cross-section | 630 mm² |
| IACS conductivity | 52.5 % IACS |
| Stranding | Concentric-lay, multiple layers |
| Rated tensile strength | ~165 MPa |
| Mass per unit length | ~1.74 kg/m |
| Typical application | Overhead distribution, 110kV sub-transmission |
| Operating temperature | 70 °C continuous |
Compliance Standards
- ✓IEC 61089
- ✓GB/T 1179
- ✓ASTM B399 (on request)
Overview
Concentric-lay stranding of hard-drawn AA-6201 aluminum alloy wires. The 6201-T81 alloy combines magnesium and silicon to give about twice the tensile strength of plain 1350-O aluminum while keeping conductivity at 52.5% IACS (versus 61% for pure aluminum). The compromise is favorable for distribution spans 200m and longer.
Key Features
Higher strength than AAC
~2× the tensile of plain aluminum — supports longer spans without the corrosion concerns of steel-reinforced ACSR.
Single-metal corrosion advantage
No bimetallic galvanic effects vs ACSR — preferred for coastal and high-humidity overhead lines.
Applications
Distribution overhead lines
Distribution feeders in rural and suburban networks where overhead lines are economical.