ACSS/TW (Aluminium Conductor Steel Supported / Trapezoidal Wire) is a high-temperature, low-loss overhead transmission conductor consisting of annealed aluminum trapezoidal wires stranded on a steel core. Its unique trapezoidal conductor structure (TW) can accommodate more aluminum at the same outer diameter, increase current carrying capacity and reduce corona and resistance losses.

Compared with traditional ACSR, ACSS/TW can operate for a long time in an environment up to 250°C without losing mechanical properties, and is suitable for line capacity expansion or new high-load lines. Its aluminum wire is fully annealed, soft and does not creep, and the steel core bears all the tension, ensuring that the line remains stable at high temperatures.

The trapezoidal wire design increases the aluminum cross-sectional area while maintaining the same outer diameter, making it convenient to upgrade old lines without changing towers. Compared with ACSS, ACSS/TW further optimizes the conductor structure, improves transmission efficiency and reduces energy consumption.

ACSS/TW conductors are widely used in high-voltage and ultra-high-voltage transmission lines and line projects under complex environmental conditions. They comply with international standards such as ASTM B857 and B856 and are an ideal choice for high-temperature capacity expansion and energy-saving transformation of modern power grids.