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JW-XLA-III Aluminum Alloy Compact Busway

I. Product Overview

The JW-XLA-III compact aluminum busway (5mm type) is suitable for three-phase four-wire and three-phase five-wire AC 50Hz power distribution systems with a rated voltage of 380V and rated operating current from 400A to 5000A. The product adopts the classic sandwich structure, with a sound design and stable performance — reliable, highly efficient, good heat dissipation, low voltage drop, impact-resistant, and easy to install — meeting the power distribution needs of a wide range of users. It complies with the national standard GB/T 7251.6 and is suitable for high-current power distribution in industrial plants, commercial complexes, high-rise buildings, residential communities, data centers, rail transit, and similar settings. Thanks to its light weight, cost advantage, and good conductivity, aluminum busbar busway has steadily gained share in the low- and medium-voltage distribution market and has become a closely watched, cost-effective choice in project selection.

II. Core Structure

JW-XLA-III compact aluminum busway is composed of three core components: high-purity aluminum busbar conductors, high-performance insulation material, and a high-strength aluminum alloy enclosure.

Conductor: high-purity electrical aluminum busbars (aluminum content ≥99.5%) are used as the conducting material. The busbar surface undergoes anti-oxidation treatment to effectively enhance corrosion resistance and reduce contact resistance. The 5mm busbar thickness is the result of precise calculation and optimized design, balancing current-carrying capacity, heat dissipation, and light weight. Aluminum's density of just 2.7 g/cm³ — about one-third that of copper — makes busway of the same length significantly lighter, easing transport and installation. Busbar width can be flexibly configured by current rating, with common sizes including 50mm×5mm, 60mm×5mm, 80mm×5mm, 100mm×5mm, 120mm×5mm, and 150mm×5mm, covering a range of current ratings. Conductivity is about 60%-65% that of pure copper, and a suitably larger cross-section design can achieve current-carrying capacity close to that of copper busbars.

Insulation system: the busbars are wrapped in a C-type polyester film using an integral covering process; the insulation material is halogen-free, with a flame-retardant rating of Class B or above and heat resistance above 130°C. It releases no toxic gases in a fire, meeting stringent fire-safety requirements. The larger cross-section of the 5mm busbar demands higher heat resistance and aging resistance from the insulation, so JW-XLA-III uses premium Class B insulation film to ensure long-term stable operation under high-current conditions.

Enclosure: made from premium aluminum-magnesium alloy profile at least 2mm thick, with a heat-dissipating fin design and a surface finish of anodizing or electrostatic powder coating. The aluminum alloy enclosure combines two side panels with top and bottom covers; the side panels feature heat-dissipation fins and dovetail grooves, assembled screw-free through interlocking grooves, giving a high protection rating. The enclosure's protective-circuit continuity resistance is ≤0.007Ω, ensuring a safe, reliable grounding loop. The optimized enclosure structure increases external surface area for heat dissipation, improving cooling performance and heat transfer from conductor to enclosure while lowering temperature rise. The aluminum-magnesium alloy enclosure is non-magnetic and highly corrosion-resistant — after anodizing, its corrosion resistance reaches 20 times that of galvanized steel sheet, allowing it to adapt to a wide range of complex environments.

The product supports tap-off connections: tap-off outlets are built into the busway trunk, wrapped in tin-plated T2 copper sheet and secured with aluminum rivets, allowing plug-in boxes to connect to terminal meter panels or equipment. Each plug-in box is fitted with copper pins and a circuit breaker; the copper pins insert into the busway trunk to draw power, achieving true plug-and-play convenience. Where aluminum-conductor busway connects to switchgear and plug-in boxes, both the incoming line and the plug-in box must undergo copper-aluminum transition treatment — using copper-aluminum transition blocks or tin-plating — to effectively prevent galvanic corrosion and ensure a reliable connection.

III. Core Performance Features

Lightweight design, convenient installation. Aluminum's density of 2.7 g/cm³ — about one-third that of copper — makes busway of the same length significantly lighter. Compared to copper busway, aluminum busway weighs about two-thirds less, making transport and installation more convenient and significantly reducing construction cost and difficulty. In space-constrained scenarios requiring vertical installation, such as electrical shafts in high-rise buildings, this lightweight advantage is especially valuable, greatly reducing installer labor and shortening the construction period.

Significant cost advantage, outstanding value. Aluminum typically costs only one-quarter to one-third the price of copper, substantially lowering raw material costs versus pure copper busbar busway. Against a backdrop of elevated, volatile copper prices, this cost advantage is especially pronounced, effectively controlling upfront project procurement costs. The JW-XLA-III (5mm type) fully meets the power distribution needs of conventional buildings and industrial facilities while offering good economics, giving customers a high-value product choice.

Efficient heat dissipation, excellent temperature-rise control. JW-XLA-III uses a compact structure in which aluminum busbars, wrapped in high-quality insulation, are pressed tightly together; heat from the busbars is conducted to the aluminum alloy enclosure for dissipation, giving high cooling efficiency. Combined with the 5mm busbar thickness and the enclosure's heat-dissipation fin design, heat from the closely packed busbars escapes quickly through the enclosure, effectively lowering busway temperature rise and ensuring long-term stable operation.

Good conductivity and current-carrying capacity. Aluminum busbars offer good conductivity — for equal weight, aluminum conducts nearly twice as well as copper. With a well-designed 5mm cross-section, JW-XLA-III can carry a rated operating current of 400A to 5000A, meeting most low- and medium-voltage distribution needs. Aluminum busway has a low voltage drop, keeping line losses within a reasonable range, making it suitable for a variety of long-distance runs.

Full range of ratings, flexible configuration. Current ratings cover 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, and 5000A, configurable flexibly as three-wire, four-wire, or five-wire systems. Manufacturing length is determined by current rating: for 1250A and below, standard segments run 3 meters up to a maximum of 6 meters; for 1600A-2000A, segments are generally within 3 meters; for 2500A and above, segments are generally 1.5-2 meters, easing on-site installation and transport.

Multiple layers of protection, safe and reliable. Protection ratings of IP40, IP54, IP65, and others are available, selected flexibly according to the installation environment. The product has passed national CQC certification, strictly complies with national standards, and features reliable electrical and mechanical connections for safe, stable long-term operation. The product is made entirely of halogen-free, environmentally friendly materials, and the insulation system releases no toxic gases in a fire, meeting green building and fire-safety requirements.

Integral grounding technology, superior protective performance. JW-XLA-III uses a highly conductive, non-magnetic aluminum alloy enclosure as the protective earth conductor, surrounding the phase conductors on all sides. This integral grounding approach keeps the protective earth as close as possible to the three-phase busbars, minimizing reactance, with equal distance — and therefore equal reactance — from the earth conductor to each phase busbar. Combining the enclosure with the PE conductor avoids the poor grounding continuity that can result from long-term corrosion or poor contact at enclosure-to-PE connections, in line with the IEC-recommended approach of using the busway enclosure itself as the grounding conductor.

IV. Core Process Features

JW-XLA-III compact aluminum busway employs multiple advanced manufacturing technologies to ensure precision, reliability, and consistency.

Automated processing. Jiuwei Busway Technology uses automated stamping, bending, and welding equipment together with laser distance measurement and inline temperature-rise testing systems, holding precision within ±0.5mm. Busbar cutting, punching, and surface treatment are strictly controlled to ensure precise dimensions and a smooth, burr-free surface. Some production lines have introduced an MES system providing full traceability from raw material receipt to finished-product shipment, so every product's complete production history can be traced.

Conductor surface treatment. The busbar surface undergoes pickling, phosphating, and anti-oxidation treatment to remove the surface oxide layer and enhance conductive contact performance. Tin-plating is available as an option to further improve oxidation resistance and reduce contact resistance, ensuring reliable long-term contact.

Screw-free assembly. The aluminum alloy enclosure's top and bottom covers connect to the side panels through an interlocking groove structure, requiring no screws, rivets, or welding. Because the enclosure has no holes, moisture and dust cannot enter, raising the protection rating while giving a very clean appearance. The side panels' heat-dissipation fins and dovetail grooves aid cooling, strengthen the enclosure, ease installation, and reduce the busway's overall weight.

Insulation wrapping process. The busbars are covered by an integral C-type polyester film wrapping process, applying the insulation material evenly and densely to the busbar surface with no bubbles or wrinkles. The insulation material is halogen-free and flame-retardant, releasing no toxic gases in a fire, meeting environmental and fire-safety requirements.

V. Diverse Application Scenarios

With its lightweight design, significant cost advantage, excellent heat dissipation, and reliable overall performance, JW-XLA-III compact aluminum busway (5mm type) is widely used across many industries and scenarios, offering an especially strong value proposition in low- and medium-voltage power distribution.

(1) Industrial Plants

Industrial plants typically require high-current power supply, and JW-XLA-III's high current-carrying capacity and light weight meet the demands of heavy machinery and production-line equipment. In automotive plants, the stamping, welding, painting, and final assembly shops all require high-capacity power distribution, and compact aluminum busway can supply the whole vehicle production line with stable, efficient power. In machining enterprises, it supports the continuous operation of CNC equipment and large machining centers. In the food and beverage industry, its sealing and protection ratings suit more demanding production environments. In general manufacturing sectors such as plastics, textiles, and building materials, JW-XLA-III's outstanding value makes it an ideal choice for power distribution upgrades.

(2) Commercial Complexes and Public Buildings

In high-rise office towers, JW-XLA-III can be flexibly installed vertically in electrical shafts as the main trunk of a tree-type power distribution system, supplying stable power to office equipment, lighting, and HVAC systems. Aluminum busway's light weight is a significant advantage for vertical installation in tall buildings, greatly reducing structural load and installation difficulty. In large shopping centers, it supports the power needs of high-power air conditioning, lighting, and elevators, while its compact structure does not compromise the building's appearance. In exhibition halls and convention centers, JW-XLA-III can supply centralized power to lighting, audio, and display equipment, with a modular design that adapts easily to on-site requirements.

(3) Residential Communities and Civil Buildings

In premium residential projects, JW-XLA-III provides an efficient, safe power distribution solution for high-rise housing. Installed vertically in electrical shafts, a single installation easily handles floor-by-floor power distribution and future load-growth needs, offering excellent economics and flexibility. Compared to traditional cable installation, compact aluminum busway is smaller and takes up less space, improving building space utilization. The 5mm busbar thickness fully meets residential distribution needs while offering good material economics, significantly lowering the investment cost of a residential project's electrical infrastructure.

(4) Data Centers and Information Infrastructure

Data centers demand extremely high stability and reliability from power systems, and JW-XLA-III is one of the more cost-effective distribution solutions available. It supplies high-density, high-current power to servers and storage equipment. Its good conductivity reduces power loss and improves energy efficiency. Aluminum busway's light weight eases flexible wiring and installation within data center equipment rooms. Since data center equipment is updated frequently, JW-XLA-III's modular design simplifies future expansion and adjustment, lowering the cost of upgrading the power system. In small and mid-sized data centers and edge computing nodes, aluminum busway's excellent value makes it a preferred distribution choice.

(5) Hospitals and Medical Facilities

Hospitals demand extremely high stability and safety from power systems. In operating rooms and ICUs, JW-XLA-III supplies uninterrupted power to critical medical equipment, ensuring patient safety. In imaging and laboratory departments where precision instruments are concentrated, its high protection rating and low electromagnetic interference help ensure accurate equipment operation. Its low-loss characteristics meet hospitals' energy-saving and environmental requirements, and its strong fire performance effectively reduces fire risk. Aluminum busway's light weight eases installation in power distribution retrofits of existing hospital buildings, minimizing disruption to normal hospital operations.

(6) Schools and Educational Facilities

School buildings need stable, reliable power to support daily teaching operations. With its high load capacity and stable performance, JW-XLA-III is an ideal choice for school power distribution systems, reliably supplying classroom lighting, laboratory equipment, multimedia teaching systems, and HVAC. Aluminum busway's cost advantage gives it strong competitiveness in publicly funded projects like schools, delivering high-quality power distribution within limited budgets.

(7) Stadiums and Large Public Facilities

Stadiums need high-power supply for lighting, audio, and large display systems, and JW-XLA-III's high current-carrying capacity fully meets these demands. Its compact structure can be concealed within the building fabric without affecting the venue's appearance. The modular design enables rapid installation, suited to the short, tight construction schedules typical of stadium projects. Aluminum busway's light weight is an advantage for long-span installation in large venues, reducing installation difficulty and construction cost.

(8) Airport Terminals and Transport Hubs

Airport terminals need stable power for a large volume of equipment — security screening, baggage handling, information systems, lighting, and HVAC all demand high-quality power supply. JW-XLA-III's stability and reliability keep these critical systems running. Aluminum busway's light weight is a significant advantage across the extensive wiring runs of a terminal, reducing structural load and installation effort. In rail transit, subway stations and depots need high-capacity distribution to power signaling, ventilation, platform screen doors, and lighting. Compact aluminum busway's flexible installation adapts to complex station layouts, and its modular design eases phased construction and ongoing maintenance.

(9) New Energy

At photovoltaic power stations, JW-XLA-III efficiently carries the high currents generated by solar power systems. The aluminum conductor's light weight and low cost are significant advantages across a solar plant's large distribution network. At wind farms, it supplies stable power to wind turbine equipment. In energy storage systems, it supports the power needs of high-power storage equipment, helping green energy be used efficiently and transmitted to the grid. As solar, wind, and other renewable generation scales up, aluminum busway's excellent value and light weight give it broad application prospects in new-energy power distribution.

(10) Distribution Rooms and Substations

Busway rated at 2000A and above is commonly used in distribution rooms. JW-XLA-III (5mm type) suits this setting as the connecting trunk between transformers and low-voltage switchgear, delivering high current efficiently. Aluminum busway's light weight eases installation and maintenance in distribution rooms, and its cost advantage effectively lowers the investment needed to build the power distribution system. In distribution-room applications, the 5mm aluminum busbar can carry the high current output by transformers while meeting the dual requirements of compact installation and reliable operation.

(11) Cost-Effective Engineering Projects

For projects with limited budgets but high power distribution quality needs, JW-XLA-III offers a high-value option. Compared to pure copper busbar busway, aluminum busway can reduce material costs by about 60%-70%, while the larger 5mm cross-section design ensures sufficient current-carrying capacity — especially suited to cost-sensitive projects such as municipal engineering, affordable housing, and standardized factory buildings in economic development zones.

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