CHARACTERISTICS

Characteristics of AAAC (All Aluminium Alloy Conductor)

1. Electrical Performance

1. Higher ampacity and lower power loss

   With the same outer diameter, its current-carrying capacity is 15%–20% higher than ACSR. Without steel core, there is no eddy current or hysteresis loss, resulting in smaller AC resistance and better energy-saving effect.

2. Higher permissible operating temperature

   Long-term operating temperature reaches 90℃, and short-time overload temperature can hit 120℃, with stronger overload capacity than AAC.

3. Stable reactance & low electromagnetic interference

   Homogeneous alloy structure eliminates magnetic effect caused by steel-aluminum composite. Uniform line reactance makes it suitable for medium/high-voltage distribution lines and railway traction power lines.

2. Mechanical Properties

1. Excellent specific strength

   Much lower density than steel while tensile strength comparable to ACSR of the same size. Lighter self-weight allows longer span length (2%–15% longer than ACSR), cutting the number of transmission towers and construction investment.

2. Good anti-creep performance & low sag

   Heat-treated alloy resists plastic creep effectively. Sag barely changes under long-term tension and high temperature, avoiding ground discharge risks for long-span lines.

3. Corrosion Resistance

4. Construction & Application Advantages

1. Light overall weight reduces transportation, hoisting and installation costs.
2. Simple structure without steel core, easy cutting, joint connection and maintenance.
3. Wide application: overhead distribution lines, long-span transmission lines, coastal power grids, railway traction lines.

5. Disadvantages