Material Advantages

E99 is a high-purity electrical-grade aluminium alloy designed for power systems that demand superior conductivity and structural stability. With a purity of up to 99.99% and extremely low impurity levels, E99 ensures excellent electrical performance, thermal stability, and mechanical strength. It is widely used in key sectors such as high-voltage power transmission, new energy systems, and rail transportation.

The key advantage of the E99 aluminium busbar lies in its ultra-high electrical conductivity. Laboratory tests show a conductivity of ≥62% IACS, significantly higher than that of conventional electrical-grade aluminium. It also features excellent ductility, weldability, and corrosion resistance, making it highly suitable for cutting, welding, and further processing in complex assemblies and harsh industrial environments.

Optimized Process for Reliable Performance

To maximize the performance of the E99 busbar, we strictly control the following key production parameters:

• Ingot heating temperature: 460~480℃
• Extrusion speed: 12~18 m/min for uniform microstructure
• Peak aging treatment: 170℃ ± 5℃ for 6 hours
• Over-aging treatment: 195℃ ± 5℃ for 4 hours

These optimized parameters result in a fine, compact grain structure (grain grade 1–2), while achieving an ideal balance between mechanical strength and conductivity, ensuring long-term operational reliability.

Product Specifications

Application Fields

1. High-Voltage Power Transmission Busbar Systems

Ideal for main and branch busbars in substations rated 110kV and above. E99 reduces energy losses and improves transmission efficiency, especially in space-constrained, high-current applications.

2. Transformer Winding Connection Straps

Used in oil-immersed and dry-type transformers to connect coil terminals to external conductors. E99 offers reliable performance under high temperatures, with excellent oxidation resistance and long-term contact stability.

3. Energy Storage / Photovoltaic Busbars

Applied in battery pack interconnections, combiner box busbars, and inverter terminals. Its high conductivity and lightweight nature enhance energy efficiency and system integration in solar, wind, and energy storage plants.

4. Power Capacitor Internal Connections

Used in shunt capacitors, filter capacitors, and harmonic suppression devices. E99 provides excellent heat resistance and electrical stability, ensuring consistent performance and extended service life of capacitors.

5. Rail Transit and EV Charging Systems

Widely used in traction power supply systems, on-board power distribution, and fast-charging EV stations. E99 busbars support high-frequency, high-load conditions with reliable current-carrying capacity and structural integrity.

With its superior electrical and mechanical properties, E99 aluminium busbar has become a core material in advanced electrical systems, contributing to the future of green energy and efficient power transmission.