Vertical Sandwich Busway

Product Positioning: An Efficient Power Transmission Solution Tailored for Vertical Power Distribution Scenarios

The Qingdao Fenghua Electric Vertical Sandwich Busway is a high-current power distribution solution meticulously crafted for scenarios such as power distribution shafts in high-rise buildings and vertical power transmission in industrial plants. By integrating a "sandwich" compact-stacking structure with a design optimized for vertical installation, the product achieves multiple breakthroughs in space utilization, power transmission efficiency, safety, and stability, establishing itself as a premier choice for vertical power distribution in modern architectural and industrial settings.

Technical Parameters

Core Technologies: Performance Breakthroughs in Vertical Environments

1. Customized "Sandwich" Stacking Structure: A Compact Design Adapted for Vertical Spaces

The product employs a "sandwich" structure featuring the gapless, tight stacking of three-phase conductors. The conductors are directly insulated from one another using high-performance dielectric materials, thereby completely eliminating air gaps between phases. Specifically optimized for vertical installation scenarios, the arrangement of conductors and the enclosure structure have been refined to reduce overall volume by over 30% compared to traditional busway systems. This design allows for a perfect fit within the confined spaces of power distribution shafts, enabling maximum current-carrying capacity within limited vertical channels^.

2. High-Purity Copper Conductors: Ensuring Efficiency in Vertical Power Transmission

T2-grade electrolytic copper with a purity of ≥99.95% is selected as the conductor material. At 20°C, its resistivity is as low as 0.01777 Ω·mm²/m, and its conductivity exceeds 98%. In vertical power transmission scenarios, this low-resistance characteristic effectively minimizes voltage drop over long distances, ensuring stable supply voltages across every floor of a high-rise building. The conductor surfaces can be optionally treated with tin or silver plating to enhance corrosion resistance, ensuring that low contact resistance is maintained over the long term—even within humid power distribution shaft environments—thereby eliminating potential overheating hazards.

3. Integrated Vertical Heat Dissipation System: Solving the Challenge of Temperature Rise Over Long Distances

To address the issue of heat tending to accumulate upward during vertical installation, the system employs a three-stage vertical heat dissipation pathway: "Conductor – Insulation Layer – Metal Enclosure." The enclosure is fabricated from extruded aluminum-magnesium alloy, featuring integrated longitudinal heat-dissipation fins on its surface. Compared to standard steel enclosures, this design increases the heat dissipation surface area by 35% and boosts thermal conductivity efficiency fivefold. At an ambient temperature of 40°C, the temperature rise of the connection terminals remains ≤60K, while that of the metal casing remains ≤30K—figures well below industry standards—thereby ensuring stable operation during long-distance vertical power transmission.

4. Safety Design Against the "Chimney Effect": Establishing a Robust Vertical Fire Barrier

The "sandwich" gapless structure completely eliminates continuous air channels; in the event of a fire, hot airflow is prevented from rapidly spreading upward through the busway system. This effectively eradicates the "chimney effect" at its source and has successfully passed testing by authoritative national fire safety agencies. Furthermore, a fire-resistant variant is available as an option; utilizing a composite insulation layer of mica tape and ceramifying silicone rubber, this version can maintain power supply for over 180 minutes at extreme temperatures of 960°C, thereby meeting the rigorous requirements for fire safety circuits in high-rise buildings.

Exclusive Features for Vertical Installation

1. Modular Vertical Connection System

Featuring factory-prefabricated standard units, the system utilizes double-ended torque-controlled bolts and disc springs for on-site connections. This design allows for a ±4mm installation tolerance adjustment, effectively accommodating precision deviations inherent in vertical installations. Installation time per segment is ≤10 minutes; compared to traditional cable wiring, construction efficiency is improved by over 60%.

2. Layered Plug-in Design: Flexibly Meeting Floor-Specific Power Needs

Tap-off outlets can be opened at any vertical position along the busbar trunking. The tap-off units support hot-plugging (insertion and removal under live conditions), ensuring a "ground-first, ground-last" connection sequence to completely eliminate the risk of electrical arcing. Each floor can flexibly configure tap-off units based on specific power requirements without the need to rewire entire busbar segments—perfectly accommodating the floor layout adjustments and capacity expansion needs typical of high-rise buildings.

3. Anti-Drop and Seismic Reinforcement

Specifically designed for vertical installation scenarios, the system is equipped with dedicated anti-drop brackets and seismic reinforcement components capable of withstanding magnitude 8 earthquake impacts, thereby ensuring the structural stability of the busbar trunking under extreme operating conditions. Bracket spacing can be flexibly adjusted according to floor height requirements: ≤3m for straight sections and ≤1.5m for corner sections.

Application Scenarios

1. High-Rise Building Power Distribution Shafts

Vertically routed within power distribution shafts, the system serves as a replacement for traditional cables. For the same current capacity, it occupies only one-third of the space required by cables, effectively resolving the critical issue of limited space within high-rise power distribution shafts. Its fully enclosed structure eliminates hazards such as rodent infestation and fire risks, thereby enhancing the overall safety of the building's power distribution system.

2. Vertical Power Transmission in Industrial Plants

Provides vertical backbone power supply for large-scale equipment and automated production lines within multi-story industrial facilities. Its high current-carrying density is ideally suited for concentrated equipment layouts, while its modular expandability supports flexible adjustments to production lines.

3. Specialized Vertical Environments

Waterproof cast-resin products are suitable for vertical power transmission in humid and corrosive environments—such as underground utility tunnels and rail transit systems. Fire-resistant products are applicable to vertical power distribution scenarios with stringent fire safety requirements, such as those found in the petrochemical and nuclear power industries.

Customer Value

Qingdao Fenghua Electric Appliance Manufacturing Co., Ltd. is situated in the beautiful coastal city of Qingdao, within the West Coast New Area. Established in 2005, the company is a leading manufacturer specializing in electrical products, including cable trays, busbar trunking systems, and power distribution cabinets. Our subsidiary, Qingdao Fenghua Electric Co., Ltd., operates in a complementary role to our parent company, collectively establishing a comprehensive product matrix that spans the entire spectrum of power distribution equipment. In recent years, the company has maintained a steadfast commitment to innovation, achieving remarkable results in the realm of energy conservation and consumption reduction. Several of our products—such as self-locking cable trays and copper-aluminum composite busducts—have garnered market recognition for their high added value and advanced technological content. Furthermore, we possess comprehensive test reports and mandatory certification certificates covering a wide range of busduct specifications, enabling us to fully satisfy the diverse and multifaceted needs of our clients.

By choosing Qingdao Fenghua Electric's Vertical Sandwich Busway, you benefit from:

• Space Optimization: Vertical space utilization is increased threefold, making it perfectly suited for the confined environments typical of power distribution shafts.

• Energy Efficiency: Featuring low-resistance copper conductors and a low-reactance structural design, it reduces power distribution losses by 10% to 20% annually.

• Safety and Reliability: Incorporating an anti-"chimney effect" design alongside multiple layers of protection, it establishes a robust vertical fire barrier.

• Flexible Adaptability: With a layered plug-in interface and modular installation capabilities, it accommodates future floor layout adjustments and equipment expansion requirements.

• Brand Assurance: Backed by 18 years of specialized manufacturing expertise from Qingdao Fenghua, we provide comprehensive after-sales service and technical support.

FAQ

1.What is a vertical sandwich busway?

A vertical sandwich busway is a compact, high-current distribution system with stacked copper conductors, designed for safe and efficient vertical power transmission in high-rise buildings and industrial workshops.

2.What are the current and voltage ratings?

Fenghua Electric vertical busways are rated 250A–6300A and ≤690VAC, suitable for various low-voltage high-current distribution applications.

3.What materials are used for the conductors?

High-purity T2 electrolytic copper is used, ensuring low loss, high conductivity, and long-term reliability.

4.What protection levels are available?

Protection ranges from IP54 to IP68, depending on the model, making it suitable for indoor, outdoor, and harsh environments.

5.Can the busway be used in fire-prone areas?

Yes, the fire-resistant model features insulation rated up to 180°C and short-circuit endurance designed for safe operation under fire conditions.

6.How high can it be installed vertically?

Vertical installation can reach up to 200 meters, depending on the busway type and load requirements.

7.Is installation easy?

Yes, the modular design and compact structure allow quick and convenient installation, reducing labor and project time.

8.Where is it commonly used?

Ideal for high-rise building shafts, industrial workshops, factories, data centers, and other vertical high-current distribution scenarios.