4000A Sandwich Busway

Qingdao Fenghua Electric Manufacturing Co., Ltd. manufactures premium 4000A Sandwich Busway. As the top-tier high-current compact bus trunking, it is upgraded from 3200A busway with enlarged conductor cross-section and optimized lamination structure to handle continuous ultra-heavy load. High-purity copper busbars are tightly clamped with high-temperature halogen-free insulating sheets. The integrated sandwich locking structure restrains conductors effectively against huge electromagnetic force during short-circuit faults, preventing busbar deformation and displacement. The fully enclosed rigid alloy housing provides reliable dust and moisture protection. It replaces multiple parallel heavy power cables, simplifies power room layout and reduces hidden risks of cable joint failure. It is widely used for new construction, renovation and capacity expansion of mission-critical power distribution systems.

Product Parameter (Specification)

Product Features and Application Scope

4000A Sandwich Busway is designed for ultra-large capacity main power incoming where continuous heavy load and high fault resistance are required.

Core Advantages

1. Stable Continuous 4000A Full-load Operation Optimized thickened conductor cross-section and low current density design. Temperature rise remains within standard limits under long-term 4000A continuous operation, with sufficient margin for peak load surges and equipment startup impact.

2. Superior Short-circuit Dynamic & Thermal Stability High-density laminated clamping structure firmly locks all phase conductors. It withstands massive instantaneous electromagnetic force and thermal energy during short-circuit faults, avoiding permanent deformation of copper bars.

3. Ultra-low Impedance & Low Voltage Drop High-purity plated copper bars minimize contact resistance and line impedance, reducing power transmission loss and stabilizing power quality for heavy-load core equipment.

4. Compact Structure Saves Power Room Space Compared with multi-parallel heavy cables for 4000A power transmission, the sandwich busway occupies much less space, tidies up electromechanical layout and reduces fire risks from dense cable bundles.

5. Optional Infrared Inspection Window Reserved observation windows allow regular infrared thermal scanning of bus joints without shutdown, supporting predictive maintenance for critical infrastructure.

6. Complete Heavy-duty Modular Accessories Supplied with large-current elbows, tees, expansion joints, end closures and heavy transition terminals for connection with large-capacity transformers and LV main switchgear.

Application Scenarios Hyperscale data center main incoming trunk, large chemical & metallurgical plant main distribution, substation 0.4kV main bus, super high-rise commercial complex central power supply, large industrial park power renovation and expansion.

Production Details and Craftsmanship

Qingdao Fenghua Electric adopts dedicated ultra-high-current lamination process for 4000A Sandwich Busway. Copper conductors are precision cut, polished and surface tin-plated or silver-plated to reduce contact resistance. High-temperature halogen-free low-smoke flame-retardant insulating sheets are tightly laminated between phases. The laminated assembly is clamped and enclosed in thickened high-rigidity alloy housing with anti-corrosion powder coating. Every bus segment undergoes insulation resistance test, power frequency withstand voltage test, 4000A full-load temperature rise test and short-circuit simulation test before shipment. We accept third-party witness inspection and non-standard customized terminals for large EPC projects.

Why Choose Qingdao Fenghua Electric

1. Mature Ultra-high Current Sandwich Busway Manufacturing We have rich production experience for 4000A compact bus duct, fully familiar with full-load temperature rise control and high short-circuit withstand test requirements.

2. Strict Full-load Quality Verification Each batch is verified under rated 4000A continuous load to eliminate overheating risk for core heavy-load projects.

3. Full Range of Heavy-duty Fittings Complete series of large-current prefabricated components for direction change, thermal expansion compensation and transformer/switchgear transition.

4. Full-cycle Engineering Technical Service Provide load calculation, short-circuit parameter checking, routing optimization, on-site installation guidance and acceptance support for mega projects.

5. Complete Test Reports & Certificates Supply full set of type test reports, construction drawings and certificates required for tendering and project handover.

Conclusion

Qingdao Fenghua Electric Manufacturing Co., Ltd. provides high-performance 4000A Sandwich Busway. With ultra-stable heavy-load performance, outstanding short-circuit resistance and compact footprint, it is the flagship ultra-high-current compact trunking solution for hyperscale data centers, heavy industrial bases and large power system projects. We welcome bulk procurement, drawing customization and tender cooperation with global EPC contractors and project owners.