ACSS/MA conductors are a type of High-Temperature Low-Sag conductors (HTLS). In ACSS/MA conductors, round annealed aluminium wires providing electrical conductivity are stranded around one or more Galfan-Coated steel wires operating as the supporting core of the conductor.
Annealed aluminum wires have higher electrical conductivity and lower electrical resistance. The best advantage of annealed aluminum wires compared to 1350-H19 aluminum wires is their higher thermal resistivity (up to 200 °C).
Technical Specifications:
ACSS/MA conductors are a type of High-Temperature Low-Sag (HTLS) conductors. In ACSS/MA conductors, round annealed aluminium wires providing electrical conductivity are stranded around one or more Galfan-Coated high-strength steel wires operating as the supporting core of the conductor. The combination of high-strength steel wires with annealed aluminium layers reduces sag, increases current-carrying capacity, and diminishes line losses. Engineered to operate continuously at high temperatures up to 250 °C without compromising strength. The most important difference between ACSS conductors compared to ACSR conductors is the use of 1350-O annealed aluminum wires instead of hard-drawn 1350-H19 aluminum wires. Annealed aluminum wires have higher electrical conductivity and lower electrical resistance. The other advantage of annealed aluminum wires compared to 1350-H19 aluminum wires is their higher thermal resistivity.
Galfan-Coated steel wires used in the core of ACSS/MA conductors enhances their corrosion resistance. Galfan is a Zinc-Aluminium alloy composed of Zinc - %5 Aluminium - Mischmetal that benefits the advantages of both aluminium and zinc against corrosion. This coating increases the lifespan of ACSS/MA conductors compared to ACSR/GA conductors.
The use of Galfan-Coated steel wires in the core of ACSS/MA conductors significantly increases their lifespan and reduces the need for periodic maintenance in power transmission lines, especially in areas with high humidity and adverse environmental conditions. This Galfan coating also protects the core from environmental factors such as sea salts, industrial chemicals, and extreme temperature fluctuations. Therefore, ACSS/MA conductors are highly suitable for use in coastal, industrial, and high-corrosion-risk environments. These features not only enhance the stability and efficiency of power delivery systems but also contribute to significant savings in maintenance and repair costs. Additionally, due to their ability to withstand higher temperatures, these conductors can carry higher electrical currents without performance degradation, thus improving the power transmission capacity of existing lines.