Busway Products
JW-FSMA Aluminum Alloy Waterproof Cast Busway
I. Product Overview
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway is a fully insulated resin-cast power distribution device suitable for three-phase four-wire and three-phase five-wire AC 50Hz power distribution systems with rated voltage below 1000V and rated operating current from 400A to 5000A. The product adopts a sandwich-style tightly laminated phase conductor design, with high-performance composite insulation material directly cast and sealed around the aluminum alloy busbars, forming a fully enclosed, air-gap-free structure with an IP68 protection rating, enabling reliable operation in extreme environments such as long-term submersion, high dust, and strong corrosion. The product complies with the national standard GB/T 7251.6-2015, making it an ideal power distribution choice for shipbuilding, chemical processing, metallurgy, rail transit, data centers, nuclear power, marine engineering, and other applications with high safety requirements. Aluminum alloy conductor cast busway fully leverages the significant weight-reduction advantage of aluminum, offering substantially lower weight at equivalent current-carrying capacity, making it especially suitable for engineering scenarios with strict weight requirements.
II. Core Structure
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway adopts a fully enclosed integrated casting structure, composed of three core components: high-purity aluminum alloy busbar conductors, high-performance composite insulation material, and an integrally cast protective insulation layer.
Conductor: high-purity electrical aluminum alloy busbars (aluminum content ≥99.5%) are used as the conducting material, with resistivity below 0.0283 Ω·mm²/m. The busbar surface is tin-plated to effectively enhance oxidation and corrosion resistance, reduce contact resistance, and improve connection reliability. Aluminum has a density of 2.7 g/cm³, about one-third that of copper, so busway of the same length is significantly lighter, making transport and installation more convenient. The cross-section and length of the busbars are designed according to specific load requirements; aluminum's 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 product is cast as an integral unit from a composite insulation material combining polyurethane, inorganic minerals, and epoxy resin. This composite insulation material is precisely formulated from epoxy resin, polyurethane, and various inert inorganic mineral materials (including volcanic rock minerals, quartz sand, etc.) according to a specific formula and process, with inorganic material content reaching 80%-90%, precisely proportioned with epoxy resin, curing agents, toughening agents, silane coupling agents, and other components, and integrally cured through a vacuum mixing and casting process. It offers excellent electrical insulation, mechanical properties, and heat dissipation, and is waterproof, fireproof, explosion-proof, and corrosion-resistant. The insulation material is halogen-free and releases no harmful gases when exposed to fire; it is a self-extinguishing insulation material with Class A fire resistance and an F120 fire rating.
Enclosure: the product has no metal enclosure — it is integrally cast from high-performance composite insulation material with no air gaps, eliminating enclosure electrochemical corrosion. The linear expansion coefficient of the insulation material closely matches aluminum, allowing it to expand and contract in sync with the busbars under temperature changes, effectively preventing insulation cracking and enhancing thermal stability. The insulation material has high thermal conductivity and good heat dissipation, formed through vacuum mixing and casting using an optimal formula of inert inorganic minerals and specialty epoxy resin. The unique formula ensures the insulation material's thermal expansion coefficient matches the conductor's, effectively preventing cracking.
The product features a compact, modular design with standard segment lengths of up to 6 meters, significantly reducing the number of connection points. Joints use a dual-locking method combining mechanical locking and cast sealing, ensuring reliable, maintenance-free connections.
III. Core Performance Features
Lightweight design, convenient installation. Aluminum's density of only 2.7 g/cm³ — about one-third that of copper — makes busway of the same length significantly lighter. Compared to copper busbar cast busway, aluminum busbar cast 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 or hoisting, such as electrical shafts in high-rise buildings or ship cabins, this lightweight advantage is especially valuable, greatly reducing installer labor and shortening the construction period.
Outstanding waterproof performance. The product is integrally cast from high-performance composite insulation material, offering excellent air-tightness and water-tightness with an IP68 protection rating — the highest level, preventing dust ingress and enabling long-term reliable operation even under continuous submersion. It can operate in water for extended periods or be buried underground, unaffected by altitude. Inter-segment joints are cast on-site, and once installation is complete, the system reaches IP68, suitable for harsh environments such as outdoor high-humidity areas and cable trenches.
Excellent fire resistance. The composite insulation material is self-extinguishing with Class A fire resistance and an F120 rating; it can withstand flames of 950-1000°C for over 90 minutes without circuit interruption, and being halogen-free, releases no harmful gases at high temperature. It meets the 750°C three-hour combustion test requirement and suits settings with stringent fire safety needs, achieving flame-spread prevention without a dedicated busway fire-stop unit.
Outstanding corrosion resistance. Metal-enclosed busway cannot withstand acid rain, and corrosive gases and liquid splashes in chemical plants can damage electrical equipment. The epoxy resin casting compound of Cast Busway offers excellent corrosion resistance against a wide range of chemicals. The cured resin has excellent alkali, acid, and solvent resistance and resists most mold, enabling long-term safe operation in highly polluted, corrosive environments. The product passed a 96-hour salt spray test with no corrosion.
Reliable explosion-proof performance. The fully epoxy-cast busway system offers high sealing performance, isolating live parts from flammable gases and ensuring safe operation in explosive environments. The product withstands a 6-joule mechanical impact and impacts of 6G or more, meeting the demands of harsh operating conditions.
Strong electrical insulation. The excellent casting process ensures seamless contact between insulation and conductor, avoiding partial discharge from air gaps and improving insulation strength by more than 30%. Normal insulation resistance reaches over 500 MΩ, effectively avoiding short-circuit risk from humidity and dust. The air-gap-free design eliminates the chimney effect, and once installed, the product requires no maintenance for its entire service life.
Efficient heat dissipation, excellent temperature-rise control. The composite insulation material offers high thermal conductivity (about 0.2 W/m·K) and good heat dissipation; under full load, its operating temperature is 20°C lower than standard PVC-insulated busway. The unique formula ensures the insulation material's thermal expansion coefficient matches the conductor's, preventing cracking.
High mechanical strength, excellent impact resistance. The cured composite insulation material has high mechanical strength, wear resistance, and impact resistance, achieving an IK10 impact-protection rating. The fully enclosed cast structure gives excellent dynamic thermal stability and an extremely low fire load. The compact design occupies only 17% of the volume of traditional air-insulated busway, making on-site layout convenient.
All-weather adaptability. Unaffected by altitude, the product can operate long-term at -40°C without the insulation cracking, and can be used indoors and outdoors up to pollution level 4. Its temperature range covers -40°C to 120°C, adapting to climates worldwide.
Significant cost advantage, outstanding value. Aluminum typically costs only one-quarter to one-third the price of copper, substantially lowering raw material costs versus copper busbar cast busway. Against a backdrop of elevated, volatile copper prices, this cost advantage is especially pronounced, effectively controlling upfront project procurement costs while still meeting harsh-environment power distribution needs.
Significant energy savings. Formed through fully cast, sealed curing of a 90% polyurethane and inorganic mineral resin blend with no metal enclosure, the product has low reactance, high thermal conductivity, ductility close to the conductor's, and low temperature rise and thermal resistance. Current-carrying capacity is 10%-20% higher than traditional busway at 1/2 to 1/10 the volume for the same rating. The energy-saving rate reaches 8%-30%, with conductor material usage reduced by 8%-20% versus traditional busway under the same conditions.
IV. Core Process Features
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway employs multiple advanced manufacturing technologies to ensure precision, reliability, and consistency.
Precise formulation and raw material control. The composite insulation material is precisely formulated from epoxy resin, polyurethane, and inert inorganic mineral materials. In a typical casting compound formula, inorganic mineral materials make up about 80-90 parts, combined epoxy resin about 21-28 parts, toughening agent about 11-14 parts, curing agent about 13-15 parts, plus appropriate silane coupling agent, peroxide initiator, and other additives. Key raw materials such as epoxy resin and curing agent are imported from Europe for quality assurance; aluminum alloy conductors are sourced from certified manufacturers, with performance exceeding national standards under strict inspection procedures.
Advanced vacuum casting equipment. Jiuwei Busway Technology uses new vacuum casting equipment with precise metering and vacuum mixing systems; the entire casting, batching, and mixing process is completed automatically, avoiding quality issues caused by human factors. Digital operation enables continuous metering and uniform mixing of raw materials under vacuum, letting air bubbles in the casting compound escape more easily and greatly improving both internal and external product quality.
Strict production environment control. Cast busway production requires strict environmental and process parameter control, with temperature and humidity kept within specific ranges. Jiuwei Busway Technology's casting workshop is equipped with air-conditioning systems that strictly control temperature and humidity, ensuring stable, consistent product quality, with temperature, pressure, and time parameters strictly controlled to keep the insulation layer free of bubbles and defects.
Aluminum alloy conductor pretreatment. The busbar surface undergoes pickling, phosphating, and anti-oxidation treatment to remove the surface oxide layer and enhance conductive contact, then tin-plating to further improve oxidation resistance and reduce contact resistance for reliable long-term contact. Cutting, punching, and surface treatment are strictly controlled to ensure precise dimensions and a smooth, burr-free surface.
Comprehensive quality inspection. Quality inspection includes electrical performance tests (withstand voltage, insulation resistance), mechanical strength tests, and environmental adaptability verification. The cast busway system withstands a 3750V power-frequency test for one minute with no breakdown or flashover. A contact resistance tester monitors joint contact resistance, ensuring joint temperature rise meets standard requirements.
Modular design and factory prefabrication. Before leaving the factory, the product is prefabricated into straight sections, corner sections, T-joint sections, and end caps according to project layout requirements, making on-site installation convenient. Prefabricated modules reduce on-site labor by 40%, require no secondary waterproofing, and shorten commissioning time. Standard segment lengths of up to 6 meters significantly reduce connection points, lowering overall system impedance by 15% and improving transmission efficiency.
On-site joint casting. Inter-segment joints are cast on-site — the location where faults are most likely to occur. On-site joints use a contact resistance tester to control resistance and joint temperature rise. The insulation material is mixed on-site using compact vacuum equipment, ensuring joint performance, with a dedicated Y-type waterproof connector for reliable, convenient connection.
V. Diverse Application Scenarios
With its lightweight design, significant cost advantage, and comprehensive performance in waterproofing, fire resistance, corrosion resistance, explosion resistance, high insulation, and high mechanical strength, aluminum alloy conductor cast busway is widely used in applications with stringent requirements for power supply continuity and safety.
(1) Shipbuilding and Marine Engineering
Ships, offshore platforms, and port facilities operate in marine environments with high salt spray, humidity, and corrosion, demanding strict corrosion resistance and waterproofing. Cast Busway's epoxy resin casting compound effectively resists seawater salt spray, and its IP68 rating withstands wave impact and long-term submersion. The lightweight aluminum conductor is especially valuable in the limited cabin space of ships, reducing weight and fuel consumption, and it is widely used in shipbuilding, docks, offshore wind farms, and coastal industrial zones.
(2) Petrochemical and Metallurgical Industries
Chemical plants, refineries, and steel mills involve corrosive gases, liquids, and flammable/explosive environments, demanding high safety and reliability from power distribution equipment. Cast Busway's composite insulation offers excellent alkali, acid, and solvent resistance for long-term safe operation in highly polluted, corrosive environments, and its fully epoxy-cast insulation isolates live parts from flammable gases for explosion-proof safety. Aluminum's cost advantage is especially notable in the large-scale power networks of these industries.
(3) Rail Transit and Tunnel Engineering
Subway tunnels and high-speed rail power systems demand high stability under vibration and humidity. Cast Busway withstands impacts of 6G or more, operating safely under the continuous vibration of running trains, and performs reliably in tunnels with long-term water exposure and high dust. The lightweight aluminum conductor eases installation and maintenance in narrow tunnel spaces, and the product is widely used in rail transit traction substations and station power systems.
(4) Nuclear Power and Electrical Facilities
Nuclear plants, hydropower stations, thermal power plants, and substations demand high safety ratings and reliability. Cast busway solves problems inherent to traditional cable connections in nuclear applications — high ground capacitance current, high losses, high voltage drop, low current-carrying capacity, and short service life. Aluminum alloy conductor cast busway effectively controls equipment weight and investment cost while preserving electrical performance, applicable to low- and medium-voltage systems in thermal, hydro, and nuclear power with a maximum rated current of up to 5000A.
(5) Data Centers and Information Infrastructure
Data centers demand high stability and reliability with dense equipment and valuable space. Cast Busway occupies only 17% of the volume of traditional air-insulated busway, ideal for compact data center wiring spaces, with strong electrical insulation that avoids short-circuit risk from humidity and dust. The lightweight aluminum conductor eases flexible wiring and installation, and the modular design lets data centers adjust power distribution as IT layouts change, with prefabricated modules cutting on-site labor by 40% and commissioning time.
(6) Large Public Buildings and Commercial Complexes
Airport terminals, stadiums, convention centers, and hospitals have strict safety and continuity requirements alongside dense crowds and high fire safety demands. Cast Busway's halogen-free insulation releases no harmful gases at high temperature and produces no toxic smoke in a fire, ensuring safe evacuation. It operates long-term at -40°C, unaffected by altitude, adapting to various climates. The lightweight aluminum conductor significantly reduces construction difficulty and safety risk during high-altitude installation in large-span buildings.
(7) Industrial Plants and Manufacturing Enterprises
Paper mills, machinery and electronics manufacturers, and steel and metallurgy enterprises need reliable equipment under dust, humidity, and heat. Cast Busway's fully enclosed structure resists dust ingress, avoiding short-circuit faults from conductive dust buildup. Its high mechanical strength and IK10 impact rating withstand accidental mechanical impacts, and aluminum's cost advantage delivers significant economic benefit in high-current factory power networks, with wide use across shipbuilding, papermaking, power plants, substations, petrochemicals, steel and metallurgy, machinery, electronics, and large buildings.
(8) Coal Mines and Mining
Underground coal mines and mining environments involve high dust, humidity, and flammable gases, demanding special explosion-proofing and sealing. Cast Busway's fully epoxy-cast structure offers high sealing performance, isolating live parts from flammable gases, and withstands a 6-joule mechanical impact with good explosion-proof performance. The lightweight aluminum conductor eases transport and installation in narrow underground tunnels, suiting coal mines and similar safety-critical settings.
(9) Wastewater Treatment and Water Plants
Wastewater treatment plants and waterworks operate long-term in high-humidity, moisture-laden environments where traditional metal-enclosed busway is prone to corrosion. Cast Busway's IP68 rating allows extended submersion while providing stable power transmission, and its composite insulation resists erosion from wastewater and chemical agents for long-term reliable operation. The lightweight aluminum conductor eases hoisting and maintenance in humid pump rooms.
(10) New and Renewable Energy
Photovoltaic stations, wind farms, and energy storage stations are often located in coastal, desert, or high-altitude areas with harsh conditions, demanding high all-weather adaptability. Cast Busway operates normally at altitudes up to 5,000 meters with a temperature range of -40°C to 120°C, adapting to extreme climates. Aluminum's cost advantage and light weight offer significant economic and practical value in large-scale distributed new energy projects, meeting the high-power demands of large renewable energy installations.
(11) Underground Engineering and Cable Trenches
Underground utility tunnels, cable trenches, and civil air defense projects have narrow spaces, high humidity, and poor drainage, where traditional busway is prone to moisture damage. Cast Busway can be buried underground, unaffected by altitude, and operates reliably in long-term submerged environments. Once installed, the system reaches IP68 protection, suitable for outdoor high-humidity areas and cable trenches. The metal-enclosure-free design eliminates enclosure electrochemical corrosion, giving a service life far exceeding traditional products, and the lightweight aluminum conductor reduces installation difficulty in cramped underground spaces.
(12) Cost-Effective Engineering Projects
For projects with limited budgets but high power distribution quality needs, aluminum alloy conductor cast busway offers a high-value option. Compared to copper busbar cast busway, it can reduce material costs by about 60%-70%, while a larger cross-section design ensures sufficient current-carrying capacity. It especially suits cost-sensitive, reliability-conscious projects such as municipal engineering, affordable housing, standardized factory buildings in economic development zones, and old power distribution system retrofits.
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway is a fully insulated resin-cast power distribution device suitable for three-phase four-wire and three-phase five-wire AC 50Hz power distribution systems with rated voltage below 1000V and rated operating current from 400A to 5000A. The product adopts a sandwich-style tightly laminated phase conductor design, with high-performance composite insulation material directly cast and sealed around the aluminum alloy busbars, forming a fully enclosed, air-gap-free structure with an IP68 protection rating, enabling reliable operation in extreme environments such as long-term submersion, high dust, and strong corrosion. The product complies with the national standard GB/T 7251.6-2015, making it an ideal power distribution choice for shipbuilding, chemical processing, metallurgy, rail transit, data centers, nuclear power, marine engineering, and other applications with high safety requirements. Aluminum alloy conductor cast busway fully leverages the significant weight-reduction advantage of aluminum, offering substantially lower weight at equivalent current-carrying capacity, making it especially suitable for engineering scenarios with strict weight requirements.
II. Core Structure
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway adopts a fully enclosed integrated casting structure, composed of three core components: high-purity aluminum alloy busbar conductors, high-performance composite insulation material, and an integrally cast protective insulation layer.
Conductor: high-purity electrical aluminum alloy busbars (aluminum content ≥99.5%) are used as the conducting material, with resistivity below 0.0283 Ω·mm²/m. The busbar surface is tin-plated to effectively enhance oxidation and corrosion resistance, reduce contact resistance, and improve connection reliability. Aluminum has a density of 2.7 g/cm³, about one-third that of copper, so busway of the same length is significantly lighter, making transport and installation more convenient. The cross-section and length of the busbars are designed according to specific load requirements; aluminum's 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 product is cast as an integral unit from a composite insulation material combining polyurethane, inorganic minerals, and epoxy resin. This composite insulation material is precisely formulated from epoxy resin, polyurethane, and various inert inorganic mineral materials (including volcanic rock minerals, quartz sand, etc.) according to a specific formula and process, with inorganic material content reaching 80%-90%, precisely proportioned with epoxy resin, curing agents, toughening agents, silane coupling agents, and other components, and integrally cured through a vacuum mixing and casting process. It offers excellent electrical insulation, mechanical properties, and heat dissipation, and is waterproof, fireproof, explosion-proof, and corrosion-resistant. The insulation material is halogen-free and releases no harmful gases when exposed to fire; it is a self-extinguishing insulation material with Class A fire resistance and an F120 fire rating.
Enclosure: the product has no metal enclosure — it is integrally cast from high-performance composite insulation material with no air gaps, eliminating enclosure electrochemical corrosion. The linear expansion coefficient of the insulation material closely matches aluminum, allowing it to expand and contract in sync with the busbars under temperature changes, effectively preventing insulation cracking and enhancing thermal stability. The insulation material has high thermal conductivity and good heat dissipation, formed through vacuum mixing and casting using an optimal formula of inert inorganic minerals and specialty epoxy resin. The unique formula ensures the insulation material's thermal expansion coefficient matches the conductor's, effectively preventing cracking.
The product features a compact, modular design with standard segment lengths of up to 6 meters, significantly reducing the number of connection points. Joints use a dual-locking method combining mechanical locking and cast sealing, ensuring reliable, maintenance-free connections.
III. Core Performance Features
Lightweight design, convenient installation. Aluminum's density of only 2.7 g/cm³ — about one-third that of copper — makes busway of the same length significantly lighter. Compared to copper busbar cast busway, aluminum busbar cast 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 or hoisting, such as electrical shafts in high-rise buildings or ship cabins, this lightweight advantage is especially valuable, greatly reducing installer labor and shortening the construction period.
Outstanding waterproof performance. The product is integrally cast from high-performance composite insulation material, offering excellent air-tightness and water-tightness with an IP68 protection rating — the highest level, preventing dust ingress and enabling long-term reliable operation even under continuous submersion. It can operate in water for extended periods or be buried underground, unaffected by altitude. Inter-segment joints are cast on-site, and once installation is complete, the system reaches IP68, suitable for harsh environments such as outdoor high-humidity areas and cable trenches.
Excellent fire resistance. The composite insulation material is self-extinguishing with Class A fire resistance and an F120 rating; it can withstand flames of 950-1000°C for over 90 minutes without circuit interruption, and being halogen-free, releases no harmful gases at high temperature. It meets the 750°C three-hour combustion test requirement and suits settings with stringent fire safety needs, achieving flame-spread prevention without a dedicated busway fire-stop unit.
Outstanding corrosion resistance. Metal-enclosed busway cannot withstand acid rain, and corrosive gases and liquid splashes in chemical plants can damage electrical equipment. The epoxy resin casting compound of Cast Busway offers excellent corrosion resistance against a wide range of chemicals. The cured resin has excellent alkali, acid, and solvent resistance and resists most mold, enabling long-term safe operation in highly polluted, corrosive environments. The product passed a 96-hour salt spray test with no corrosion.
Reliable explosion-proof performance. The fully epoxy-cast busway system offers high sealing performance, isolating live parts from flammable gases and ensuring safe operation in explosive environments. The product withstands a 6-joule mechanical impact and impacts of 6G or more, meeting the demands of harsh operating conditions.
Strong electrical insulation. The excellent casting process ensures seamless contact between insulation and conductor, avoiding partial discharge from air gaps and improving insulation strength by more than 30%. Normal insulation resistance reaches over 500 MΩ, effectively avoiding short-circuit risk from humidity and dust. The air-gap-free design eliminates the chimney effect, and once installed, the product requires no maintenance for its entire service life.
Efficient heat dissipation, excellent temperature-rise control. The composite insulation material offers high thermal conductivity (about 0.2 W/m·K) and good heat dissipation; under full load, its operating temperature is 20°C lower than standard PVC-insulated busway. The unique formula ensures the insulation material's thermal expansion coefficient matches the conductor's, preventing cracking.
High mechanical strength, excellent impact resistance. The cured composite insulation material has high mechanical strength, wear resistance, and impact resistance, achieving an IK10 impact-protection rating. The fully enclosed cast structure gives excellent dynamic thermal stability and an extremely low fire load. The compact design occupies only 17% of the volume of traditional air-insulated busway, making on-site layout convenient.
All-weather adaptability. Unaffected by altitude, the product can operate long-term at -40°C without the insulation cracking, and can be used indoors and outdoors up to pollution level 4. Its temperature range covers -40°C to 120°C, adapting to climates worldwide.
Significant cost advantage, outstanding value. Aluminum typically costs only one-quarter to one-third the price of copper, substantially lowering raw material costs versus copper busbar cast busway. Against a backdrop of elevated, volatile copper prices, this cost advantage is especially pronounced, effectively controlling upfront project procurement costs while still meeting harsh-environment power distribution needs.
Significant energy savings. Formed through fully cast, sealed curing of a 90% polyurethane and inorganic mineral resin blend with no metal enclosure, the product has low reactance, high thermal conductivity, ductility close to the conductor's, and low temperature rise and thermal resistance. Current-carrying capacity is 10%-20% higher than traditional busway at 1/2 to 1/10 the volume for the same rating. The energy-saving rate reaches 8%-30%, with conductor material usage reduced by 8%-20% versus traditional busway under the same conditions.
IV. Core Process Features
Polyurethane-blended inorganic mineral epoxy resin aluminum alloy conductor cast busway employs multiple advanced manufacturing technologies to ensure precision, reliability, and consistency.
Precise formulation and raw material control. The composite insulation material is precisely formulated from epoxy resin, polyurethane, and inert inorganic mineral materials. In a typical casting compound formula, inorganic mineral materials make up about 80-90 parts, combined epoxy resin about 21-28 parts, toughening agent about 11-14 parts, curing agent about 13-15 parts, plus appropriate silane coupling agent, peroxide initiator, and other additives. Key raw materials such as epoxy resin and curing agent are imported from Europe for quality assurance; aluminum alloy conductors are sourced from certified manufacturers, with performance exceeding national standards under strict inspection procedures.
Advanced vacuum casting equipment. Jiuwei Busway Technology uses new vacuum casting equipment with precise metering and vacuum mixing systems; the entire casting, batching, and mixing process is completed automatically, avoiding quality issues caused by human factors. Digital operation enables continuous metering and uniform mixing of raw materials under vacuum, letting air bubbles in the casting compound escape more easily and greatly improving both internal and external product quality.
Strict production environment control. Cast busway production requires strict environmental and process parameter control, with temperature and humidity kept within specific ranges. Jiuwei Busway Technology's casting workshop is equipped with air-conditioning systems that strictly control temperature and humidity, ensuring stable, consistent product quality, with temperature, pressure, and time parameters strictly controlled to keep the insulation layer free of bubbles and defects.
Aluminum alloy conductor pretreatment. The busbar surface undergoes pickling, phosphating, and anti-oxidation treatment to remove the surface oxide layer and enhance conductive contact, then tin-plating to further improve oxidation resistance and reduce contact resistance for reliable long-term contact. Cutting, punching, and surface treatment are strictly controlled to ensure precise dimensions and a smooth, burr-free surface.
Comprehensive quality inspection. Quality inspection includes electrical performance tests (withstand voltage, insulation resistance), mechanical strength tests, and environmental adaptability verification. The cast busway system withstands a 3750V power-frequency test for one minute with no breakdown or flashover. A contact resistance tester monitors joint contact resistance, ensuring joint temperature rise meets standard requirements.
Modular design and factory prefabrication. Before leaving the factory, the product is prefabricated into straight sections, corner sections, T-joint sections, and end caps according to project layout requirements, making on-site installation convenient. Prefabricated modules reduce on-site labor by 40%, require no secondary waterproofing, and shorten commissioning time. Standard segment lengths of up to 6 meters significantly reduce connection points, lowering overall system impedance by 15% and improving transmission efficiency.
On-site joint casting. Inter-segment joints are cast on-site — the location where faults are most likely to occur. On-site joints use a contact resistance tester to control resistance and joint temperature rise. The insulation material is mixed on-site using compact vacuum equipment, ensuring joint performance, with a dedicated Y-type waterproof connector for reliable, convenient connection.
V. Diverse Application Scenarios
With its lightweight design, significant cost advantage, and comprehensive performance in waterproofing, fire resistance, corrosion resistance, explosion resistance, high insulation, and high mechanical strength, aluminum alloy conductor cast busway is widely used in applications with stringent requirements for power supply continuity and safety.
(1) Shipbuilding and Marine Engineering
Ships, offshore platforms, and port facilities operate in marine environments with high salt spray, humidity, and corrosion, demanding strict corrosion resistance and waterproofing. Cast Busway's epoxy resin casting compound effectively resists seawater salt spray, and its IP68 rating withstands wave impact and long-term submersion. The lightweight aluminum conductor is especially valuable in the limited cabin space of ships, reducing weight and fuel consumption, and it is widely used in shipbuilding, docks, offshore wind farms, and coastal industrial zones.
(2) Petrochemical and Metallurgical Industries
Chemical plants, refineries, and steel mills involve corrosive gases, liquids, and flammable/explosive environments, demanding high safety and reliability from power distribution equipment. Cast Busway's composite insulation offers excellent alkali, acid, and solvent resistance for long-term safe operation in highly polluted, corrosive environments, and its fully epoxy-cast insulation isolates live parts from flammable gases for explosion-proof safety. Aluminum's cost advantage is especially notable in the large-scale power networks of these industries.
(3) Rail Transit and Tunnel Engineering
Subway tunnels and high-speed rail power systems demand high stability under vibration and humidity. Cast Busway withstands impacts of 6G or more, operating safely under the continuous vibration of running trains, and performs reliably in tunnels with long-term water exposure and high dust. The lightweight aluminum conductor eases installation and maintenance in narrow tunnel spaces, and the product is widely used in rail transit traction substations and station power systems.
(4) Nuclear Power and Electrical Facilities
Nuclear plants, hydropower stations, thermal power plants, and substations demand high safety ratings and reliability. Cast busway solves problems inherent to traditional cable connections in nuclear applications — high ground capacitance current, high losses, high voltage drop, low current-carrying capacity, and short service life. Aluminum alloy conductor cast busway effectively controls equipment weight and investment cost while preserving electrical performance, applicable to low- and medium-voltage systems in thermal, hydro, and nuclear power with a maximum rated current of up to 5000A.
(5) Data Centers and Information Infrastructure
Data centers demand high stability and reliability with dense equipment and valuable space. Cast Busway occupies only 17% of the volume of traditional air-insulated busway, ideal for compact data center wiring spaces, with strong electrical insulation that avoids short-circuit risk from humidity and dust. The lightweight aluminum conductor eases flexible wiring and installation, and the modular design lets data centers adjust power distribution as IT layouts change, with prefabricated modules cutting on-site labor by 40% and commissioning time.
(6) Large Public Buildings and Commercial Complexes
Airport terminals, stadiums, convention centers, and hospitals have strict safety and continuity requirements alongside dense crowds and high fire safety demands. Cast Busway's halogen-free insulation releases no harmful gases at high temperature and produces no toxic smoke in a fire, ensuring safe evacuation. It operates long-term at -40°C, unaffected by altitude, adapting to various climates. The lightweight aluminum conductor significantly reduces construction difficulty and safety risk during high-altitude installation in large-span buildings.
(7) Industrial Plants and Manufacturing Enterprises
Paper mills, machinery and electronics manufacturers, and steel and metallurgy enterprises need reliable equipment under dust, humidity, and heat. Cast Busway's fully enclosed structure resists dust ingress, avoiding short-circuit faults from conductive dust buildup. Its high mechanical strength and IK10 impact rating withstand accidental mechanical impacts, and aluminum's cost advantage delivers significant economic benefit in high-current factory power networks, with wide use across shipbuilding, papermaking, power plants, substations, petrochemicals, steel and metallurgy, machinery, electronics, and large buildings.
(8) Coal Mines and Mining
Underground coal mines and mining environments involve high dust, humidity, and flammable gases, demanding special explosion-proofing and sealing. Cast Busway's fully epoxy-cast structure offers high sealing performance, isolating live parts from flammable gases, and withstands a 6-joule mechanical impact with good explosion-proof performance. The lightweight aluminum conductor eases transport and installation in narrow underground tunnels, suiting coal mines and similar safety-critical settings.
(9) Wastewater Treatment and Water Plants
Wastewater treatment plants and waterworks operate long-term in high-humidity, moisture-laden environments where traditional metal-enclosed busway is prone to corrosion. Cast Busway's IP68 rating allows extended submersion while providing stable power transmission, and its composite insulation resists erosion from wastewater and chemical agents for long-term reliable operation. The lightweight aluminum conductor eases hoisting and maintenance in humid pump rooms.
(10) New and Renewable Energy
Photovoltaic stations, wind farms, and energy storage stations are often located in coastal, desert, or high-altitude areas with harsh conditions, demanding high all-weather adaptability. Cast Busway operates normally at altitudes up to 5,000 meters with a temperature range of -40°C to 120°C, adapting to extreme climates. Aluminum's cost advantage and light weight offer significant economic and practical value in large-scale distributed new energy projects, meeting the high-power demands of large renewable energy installations.
(11) Underground Engineering and Cable Trenches
Underground utility tunnels, cable trenches, and civil air defense projects have narrow spaces, high humidity, and poor drainage, where traditional busway is prone to moisture damage. Cast Busway can be buried underground, unaffected by altitude, and operates reliably in long-term submerged environments. Once installed, the system reaches IP68 protection, suitable for outdoor high-humidity areas and cable trenches. The metal-enclosure-free design eliminates enclosure electrochemical corrosion, giving a service life far exceeding traditional products, and the lightweight aluminum conductor reduces installation difficulty in cramped underground spaces.
(12) Cost-Effective Engineering Projects
For projects with limited budgets but high power distribution quality needs, aluminum alloy conductor cast busway offers a high-value option. Compared to copper busbar cast busway, it can reduce material costs by about 60%-70%, while a larger cross-section design ensures sufficient current-carrying capacity. It especially suits cost-sensitive, reliability-conscious projects such as municipal engineering, affordable housing, standardized factory buildings in economic development zones, and old power distribution system retrofits.