ACSR 400/51 Steel Reinforced Overhead Bare Conductor | High-Tension Transmission Cable

The ACSR (Aluminium Conductor Steel Reinforced) 400/51 is a high-performance bare overhead conductor specifically designed for critical electrical power transmission and sub-transmission lines operating at medium, high, and extra-high voltages (EHV).

This conductor is structurally composed of two materials to achieve an optimal blend of electrical and mechanical properties. It features multiple concentric strands of hard-drawn 1350-H19 aluminium wires over a robust core made of galvanized high-tensile steel wires. The aluminium strands (nominal area $400\text{mm}^2$) provide high conductivity for efficient current flow, while the steel core (nominal area $51\text{mm}^2$) furnishes the necessary tensile strength to support the conductor’s weight over long distances, thereby minimizing sag and enabling longer span lengths between towers. As a bare conductor, it is utilized without external insulation or a protective sheath and relies on air for dielectric strength.

(2) Key Features & Advantages

• Superior Mechanical Strength: The steel reinforcement core significantly increases the breaking strength and limits elongation, allowing for longer spans and reduced construction costs (fewer towers).

• Excellent Conductivity: Utilizes high-grade 1350-H19 aluminium wire, ensuring low resistance and minimal power loss during transmission.

• Optimal High-Voltage Performance: The larger overall diameter relative to a solid conductor helps to minimize the corona effect and associated energy loss at high operating voltages.

• Corrosion Resistance: The steel core is protected by a heavy zinc galvanization coating, providing robust protection against atmospheric corrosion in various environments.

• Thermal Stability: Maintains structural integrity and electrical characteristics over a wide range of operating temperatures, ensuring reliable, year-round utility service.

(3) Technical Specifications

(4) Typical Applications

This robust ACSR bare conductor is indispensable for large-scale electrical infrastructure projects globally:

• High and Extra-High Voltage (HV/EHV) Transmission: Primary use in main grid transmission networks where long-distance, high-capacity, and high-tension lines are required.

• Sub-Transmission & Primary Distribution: Employed in high-current sub-transmission and main distribution feeders connecting substations.

• Utility Infrastructure Upgrades: Essential for reinforcing existing power grids to handle increasing load demands.

• Long-Span Crossings: Perfectly suited for difficult terrain, such as mountain passes, river crossings, and wide valleys, due to its exceptional strength-to-weight ratio.

• Industrial Power Networks: Used to deliver bulk power to large industrial facilities, mining sites, and railway electrification projects.

(5) Why Choose Us

• Certified Manufacturing Excellence: Our production processes adhere to rigorous international standards, backed by ISO 9001 and CE/TUV certifications, ensuring quality and conformity suitable for global B2B procurement.

• Vast Global Export Experience: Decades of experience supplying conductors to major EPC contractors and state utility companies across the Americas, Africa, and Southeast Asia. We ensure seamless customs and logistical execution.

• Customization & Engineering Support (OEM/ODM): We offer full OEM services, including custom stranding designs, varying aluminium-to-steel ratios to meet specific electrical/mechanical requirements, and different galvanization classes (e.g., Class A, B, or C).

• Reliable and Fast Delivery: Leveraging an optimized production line and established raw material supply chains, we guarantee competitive lead times and delivery stability for project schedules.

• Proven Project Track Record: Our ACSR conductors have been successfully deployed in diverse climates globally, evidenced by numerous long-term, high-profile utility and infrastructure engineering projects.