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Specifications of Magnesium-Aluminum Alloy Tubular Busbars

Magnesium-aluminum alloy tubular busbars are high-performance conductors designed for ultra-high voltage power transmission, combining lightweight aluminum with the mechanical strength of magnesium. Material Composition and Alloy GradesMagnesium-aluminum alloy tubular busbars are primarily composed of aluminum with magnesium additions, optimized for a balance of electrical conductivity, mechanical strength, and heat resistance. Common alloy grades include 6063G aluminum-magnesium alloy, LF21Y aluminum-manganese alloy, 6R05 rare-earth aluminum alloy, and 2A14 heat-resistant aluminum alloy.

These alloys are engineered to meet internationally advanced standards for ultra-high voltage (UHV) applications.

Electrical Properties

Electrical Conductivity: ≥60% IACS, ensuring strong current-carrying capacity and high transmission efficiency. Rated Voltage: Suitable for 500 kV to 1000 kV systems, with some designs supporting ±800 kV. Rated Current: Up to 12,000 A, capable of handling ultrahigh current transmission requirements.

Low Loss: Excellent convective heat dissipation minimizes energy loss and temperature rise during operation.

Mechanical Properties

Tensile Strength: 180–250 MPa, providing high mechanical stability under electrical and environmental stresses. Temperature Range: Operates reliably from -40℃ to 150℃, suitable for harsh outdoor environments. Lightweight Advantage: Aluminum reduces overall weight, while magnesium enhances structural strength, improving the strength-to-weight ratio.

Manufacturing and Structural Features

Seamless Tubular Design: Produced using transverse piercing hot-rolling and multipass cold-drawing to eliminate weld seam weaknesses. Thermomechanical Treatment: Precisely controls microstructure for uniform mechanical and electrical performance. Surface Treatments: Optional anodizing, tin plating, or nickel plating can enhance corrosion resistance and durability.

Dimensional Control: Tubular busbars are manufactured with precise outer diameter and wall thickness to meet current-carrying and mechanical requirements. ApplicationsMagnesium-aluminum alloy tubular busbars are widely used in: Ultra-high voltage transmission and transformation systems (220 kV, 500 kV, 750 kV, ±800 kV, 1000 kV)Substations and switchgear requiring high current capacity and low energy lossOutdoor and harsh environmental conditions due to excellent weather resistance and mechanical strength. SummaryMagnesium-aluminum alloy tubular busbars provide a high-strength, lightweight, and low-loss solution for modern power transmission systems.

Their combination of high conductivity, mechanical robustness, and thermal stability makes them ideal for UHV applications, supporting reliable and efficient energy distribution in demanding electrical networks.

Specifications of Magnesium-Aluminum Alloy Tubular Busbars

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General Information Section 1

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