ACSR (Aluminum Conductor Steel Reinforced) bare conductors, manufactured and tested in strict accordance with the ASTM B232 standard, are a cornerstone of modern overhead power transmission and distribution infrastructure. These conductors ingeniously combine the high electrical conductivity of aluminum with the robust mechanical strength of steel, delivering an optimal balance of light weight, impressive strength, and cost-effectiveness for electrical grids worldwide.
Construction
ACSR is a composite concentric-lay-stranded conductor.
The steel strand or strands form the central core of the conductor, around which is stranded one
or more layers of aluminum 1350-H19 wires.
The steel core may consist of a single strand or a concentric-stranded cable of 7, 19, 37 or more
wires. The sizes and stranding listed on the following pages are those most frequently used for overhead lines.
acsr conductor construction
Key Characteristics of ACSR Conductors (ASTM B232)
Composition: ACSR conductors are uniquely designed with a central steel core that provides superior tensile strength, surrounded by one or more layers of aluminum strands that ensure excellent electrical conductivity.
Standard Compliance: Our ACSR conductors strictly adhere to ASTM B232, which is the definitive standard specifying the requirements for concentric-lay-stranded aluminum conductors, steel-reinforced, for overhead power lines.
Versatile Applications: These conductors are suitable for use across various voltage levels and are particularly advantageous in challenging environments such as:
- Long spans: Minimizing the need for intermediate support structures.
- River crossings: Where extended distances between towers are common.
- Areas with high wind or ice loading: Where significant mechanical stress on conductors is anticipated.
Advantages:
- High Tensile Strength: The robust steel core provides the necessary mechanical strength to withstand significant external forces, including wind, ice, and tension, ensuring structural integrity over long spans.
- Good Conductivity: The outer layers of aluminum strands facilitate efficient and reliable electrical current flow, minimizing power loss during transmission.
- Lightweight: Despite their strength, ACSR conductors are relatively lightweight compared to alternative conductors offering comparable mechanical properties, simplifying installation and reducing structural load on towers.
- Economy: ACSR conductors offer an excellent balance of high performance and competitive cost, making them a popular and economically viable choice for large-scale overhead power line projects.
Steel Strands (Core): The central steel core can be treated with various coatings to provide enhanced corrosion protection, including:
- Galvanized (zinc-coated): A common and effective method for corrosion resistance.
- Aluminized: Providing a layer of aluminum for corrosion protection.
- Aluminum-clad: Offering robust corrosion resistance with a seamless aluminum layer over the steel.
Aluminum Strands: The surrounding aluminum strands are typically made from 1350-H19 high-strength aluminum alloy, chosen for its excellent conductivity and desirable mechanical properties.
Construction: ACSR conductors are precisely manufactured by concentrically stranding the aluminum and steel wires in multiple layers, ensuring uniform strength and electrical performance.
Corrosion Protection (Optional): For added protection against corrosion, especially in aggressive environments, the conductor can undergo additional treatments such as:
- Greasing the core: Applying a corrosion-inhibiting grease to the steel core.
- Infusing the entire conductor: Saturating the conductor with grease or other protective compounds.
Why Choose ACSR ASTM B232 Standard Conductors?
By adhering to the rigorous specifications of ASTM B232, our ACSR bare conductors guarantee reliability, efficiency, and longevity in critical power transmission and distribution applications. Their proven design provides a cost-effective solution for utilities and infrastructure developers seeking durable and high-performing overhead conductors capable of withstanding demanding environmental conditions.
For detailed technical specifications, available sizes, or to discuss your specific project requirements, please contact our sales team.