WQYTC2 Heat-Dissipating Intensive Energy-Saving Busway

        The WQYTC2 series heat-dissipating intensive energy-saving busway is a new generation of material-saving and energy-efficient busway product independently innovated and developed by our company. Its technical performance indicators have reached advanced levels.

        The WQYTC2 series busway is divided into two models: WQYTC2-T (copper conductor) and WQYTC2-TL (copper-aluminum composite conductor). Based on the same structure, each has its own characteristics: the copper conductor offers advantages such as low resistivity, high current-carrying capacity, fast thermal conductivity, small heat capacity ratio, and compact size; the copper-aluminum composite conductor leverages the lightweight and abundant resources of aluminum while maintaining the electrical reliability of copper conductors. Due to the larger conductor cross-section design, the temperature rise is lower, reducing the stress caused by differences in expansion rates between copper and aluminum, making the product cost-effective with high quality.

        The technical performance is briefly described as follows:

        1. Structure. The heat-dissipating intensive energy-saving busway (hereinafter referred to as "energy-saving busway") features U-shaped tubular heat sinks on both side plates. It overcomes the technical bottlenecks in the connection process and equipment between the U-shaped tubular heat sinks and the side plates, increasing the heat dissipation area by more than 5 times and maximizing the effective space of the side plates to enhance heat dissipation. The heat dissipation area is more than 2.3 times that of ordinary busways and more than 1.7 times that of aluminum alloy heat sink busways. The protection level reaches IP66.

        2. Fast Heat Dissipation and Reduced Temperature Rise. Due to the U-shaped tubular heat sinks on the side plates, when the busway carries current and temperature rises, creating a temperature difference with the surroundings, the tubular cavities naturally form a chimney-like wind tunnel effect during air heat exchange, thereby increasing airflow speed and significantly improving heat dissipation efficiency. According to 3C test data: for copper conductor energy-saving busways, the current-carrying capacity of copper conductor cross-sections rated at 5000A-4000A is 2.5A/mm², with a temperature rise not exceeding 60°C; for 3150A-2000A, it is 2.8A/mm², with a temperature rise not exceeding 55°C; for 1600A-630A, it is 3.0A/mm², with a temperature rise not exceeding 50°C; for below 500A, it is 3.3A/mm², with a temperature rise not exceeding 37°C. Compared to aluminum alloy shell busways, the temperature rise is reduced by more than 5°C, achieving low temperature rise and high current-carrying capacity.

The temperature rise of copper-aluminum composite conductors is even lower: the average temperature rise for 4000A-2500A is around 50°C; for 2000A-1600A, around 40°C; for 1250A-630A, around 35°C; and for below 630A, around 30°C.

        3. Low-Carbon and Energy-Saving. The energy-saving busway features advanced design. By incorporating U-shaped tubular heat sinks on both side plates and utilizing the chimney effect to accelerate airflow speed in the tubular cavities, heat dissipation efficiency is greatly improved. Compared to traditional products, it breaks through the technical bottlenecks of heat dissipation structures in busway products. Under the same cross-section, current-carrying capacity, and environmental conditions, it reduces temperature rise and line losses, offering low temperature rise, high current-carrying capacity, material and energy savings, compact size, and high cost-effectiveness.

        4. High Strength. The energy-saving busway uses U-shaped tubular heat sinks, which enhance the strength of the side plates, improve the busway's resistance to bending and torsion, and increase the overall strength of the busway. It also reduces the resonance frequency caused by electromagnetic effects.

        5. High Corrosion Resistance. The side plates of the energy-saving busway shell are treated with a self-developed high-corrosion-resistant vapor phase inhibitor (VCI) bimetallic composite coating technology, which reaches advanced levels. This significantly improves the corrosion resistance of the busway shell, providing rapid and long-lasting anti-corrosion effects. Tests by the Mechanical Industry Electrical Products Environmental Adaptability Testing Center show that the corrosion resistance of the high-corrosion-resistant VCI coating is more than 30 times that of hot-dip galvanizing.

        6. Balanced electromagnetic induction between the protective conductor (PE) and phase lines, resulting in lower reactance. The energy-saving busway uses the entire non-magnetic aluminum alloy shell as the protective conductor (PE) for grounding. In traditional busways, the protective ground wire (PE) is placed on one side inside the busway. Due to electromagnetic induction, the fault current induced in the PE wire is measured to be 50% higher than theoretical calculations. Additionally, the distance between the three-phase conductive bars and the PE wire is unequal, leading to unequal circuits. Over long distances, this causes severe three-phase imbalance under fault currents. Using a non-magnetic aluminum alloy shell with good conductivity as the protective ground wire, surrounding the conductive bars, minimizes reactance as it is as close as possible to the three-phase busbars. The distance between the protective ground wire and the three-phase busbars is equal, resulting in equal reactance. This grounding method performs better than a separately installed PE bar for both short-term and sustained phase-to-ground short-circuit faults. Therefore, the International Electrotechnical Commission (IEC) recommends using the shell as the grounding conductor for busways. Integrating the shell with the PE bar avoids poor grounding continuity caused by long-term corrosion and poor contact at the connection points. The method of using the entire shell as the protective conductor for grounding offers better electrical and safety performance than busways with separately installed PE conductor bars.