ACSRAS (Aluminium Conductor Aluminium Clad Steel Reinforced)

Aluminium Conductor Aluminium Clad Steel Reinforced is an upgraded composite overhead conductor, with a core design of "high conductivity aluminum layer+aluminum clad steel reinforced core", made through concentric twisting process. Its innovation replaces the traditional galvanized steel core of steel core aluminum stranded wire with "aluminum clad steel core", which not only retains the high strength characteristics of steel, but also solves the electrochemical corrosion problem between steel core and aluminum layer through aluminum coating, while improving the overall corrosion resistance.

Structure:

 Reinforced core: The aluminum clad steel core is made up of 1, 7, or 19 strands of aluminum clad steel wire twisted together, with a single wire structure of "low carbon steel core+aluminum coating layer", and the thickness of the aluminum layer is ≥ 10% of the steel wire diameter; The aluminum clad steel core is located at the center of the wire, providing the main tensile strength, and the aluminum layer is made of the same material as the outer aluminum conductor, avoiding electrochemical corrosion caused by heterogeneous metal contact.

Conductive layer: High purity aluminum monofilaments are arranged in concentric layers around the aluminum clad steel core using aluminum stranded wire. The monofilaments have a circular cross-section and the number of outer strands increases with the specification; The aluminum layer is the core of electrical energy transmission, with a twist pitch of 12-16 times the outer diameter of the wire, ensuring a tight fit with the aluminum clad steel core.

Core characteristics:

Anti corrosion upgrade：The aluminum layer of the aluminum clad steel core completely isolates the steel core from contact with air and water vapor, and its corrosion resistance life in salt spray environment is 3-5 times that of ACSR, solving the pain point of "steel core corrosion strength attenuation" in traditional steel cored aluminum stranded wire.

Excellent conductivity: The conductivity of the aluminum layer reaches 61% IACS, and the aluminum layer of the aluminum clad steel core also participates in conductivity. The overall DC resistance is comparable to ACSR of the same specification, and the power loss is low.

Electrical performance:

DC resistance: slightly lower than ACSR under the same specifications, with a 240mm ² specification resistance of ≤ 0.140 Ω/km, resulting in low energy transmission loss.

Current carrying capacity: At 25 ℃, the current carrying capacity of 120mm ² specification is about 280A, and 240mm ² is about 425A, which is equivalent to ACSR and meets the requirements of medium and high voltage transmission.

Voltage resistance: In the 1-minute power frequency withstand voltage test, there is no breakdown phenomenon for 10kV level ≥ 42kV and 110kV level ≥ 230kV.

Construction parameters:

Installation temperature: Recommended for construction at -20 ℃~45 ℃. Aluminum clad steel core has better low-temperature toughness than galvanized steel core, and preheating is not required below -20 ℃.

Tension control: Construction tension ≤ 45% of the minimum failure load to avoid tensile deformation of the aluminum layer

Application scenarios:

Coastal power grid: 10kV-220kV distribution and transmission lines in coastal cities such as Shenzhen and Qingdao are resistant to salt spray corrosion and reduce line replacement maintenance every 5-8 years.

Island networking project: used for cross sea transmission lines between islands and mainland China, resistant to seawater evaporation and salt spray, and suitable for 100-200m cross sea spans.

Industrial pollution zone: 35kV-110kV outgoing lines in chemical industrial parks and metallurgical plant areas, resistant to industrial waste gas corrosion, ensuring continuous power supply.