Feeder Type Sandwich Busway

Qingdao Fenghua Electric Manufacturing Co., Ltd. manufactures premium Feeder Type Sandwich Busway. Different from plug-in / tap-off type busway with reserved branch outlets, this feeder type is a pure main-run power transmission bus duct. It has no tap-off openings along the trunk, eliminating potential weak points caused by outlet structures. High-purity copper or aluminum conductors are tightly clamped with high-temperature halogen-free insulating sheets. The fully enclosed continuous laminated structure maximizes electrical reliability and mechanical strength. It is mainly used to connect transformer low-voltage side to main LV switchgear, or to connect main switchgear to secondary distribution boards along a fixed trunk route. With compact size and low power loss, it replaces multiple parallel heavy cables and reduces cable trench space, widely adopted for new construction, renovation and capacity expansion of industrial, commercial and infrastructure power distribution systems.

Product Parameter (Specification)

Product Features and Application Scope

Feeder Type Sandwich Busway is engineered for fixed main power transmission routes where high reliability is required and no branch tapping is needed along the run.

Core Advantages

1. Ultra-high Reliability with No Tap-off Openings No reserved branch outlets on the trunk, avoiding potential insulation weak points and leakage risks caused by tap-off structures. The continuous sealed structure provides maximum protection.

2. Compact Laminated Structure Conductors and insulating layers are tightly stacked, greatly reducing overall footprint and saving valuable power room and shaft space compared with parallel cable runs.

3. Excellent Short-circuit Dynamic & Thermal Stability The whole laminated assembly is clamped as one rigid unit, firmly restraining busbars against huge electromagnetic force during short-circuit faults and preventing deformation.

4. Low Impedance & Low Power Loss High-purity plated conductors minimize contact resistance. Non-magnetic aluminum alloy housing reduces eddy current loss, ensuring efficient long-term power transmission.

5. Flexible Layout with Prefabricated Fittings Supplied with straight lengths, elbows, tees, expansion joints, end closures and terminal transition plates for fixed trunk routing between transformer and switchgear.

6. Customized Current & Conductor Options Full current range 250A–6300A available; copper or aluminum conductor, housing surface treatment and terminal connection plates can be customized to match project drawings.

Application Scenarios Transformer to main LV switchgear connection, main switchgear to secondary distribution board trunk, substation 0.4kV main bus run, factory power house main feeder, commercial building vertical main trunk without branch tapping, industrial park centralized power transmission.

Production Details and Craftsmanship

Qingdao Fenghua Electric adopts dedicated continuous lamination process for Feeder Type Sandwich Busway. Conductors are precision cut and surface tin-plated or silver-plated (copper) / surface treated (aluminum). Halogen-free high-temperature insulating sheets are tightly laminated between phases. The whole assembly is clamped and enclosed in rigid alloy housing without tap-off openings, with anti-corrosion powder coating. Every bus segment undergoes insulation resistance test, power frequency withstand voltage test, temperature rise test and short-circuit simulation test before shipment. We accept third-party witness inspection and non-standard customized transition terminals for EPC projects.

Why Choose Qingdao Fenghua Electric

1. Mature Feeder Type Busway Manufacturing We have rich production experience for run-type compact bus duct, fully familiar with main trunk temperature rise control and short-circuit testing requirements.

2. Strict Continuous Structure Quality Control Rigorous inspection of lamination tightness, housing sealing and insulation integrity to guarantee no weak points along the main trunk.

3. Full Range of Prefabricated Fittings Complete series of straight sections, elbows, tees, expansion joints and transition terminals for fixed main trunk routing.

4. Full-cycle Engineering Technical Service Provide load calculation, short-circuit parameter verification, routing optimization and on-site installation guidance.

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

Conclusion

Qingdao Fenghua Electric Manufacturing Co., Ltd. provides high-performance Feeder Type Sandwich Busway. With no tap-off openings, continuous laminated structure and ultra-high reliability, it is the ideal main power transmission trunk for fixed routes between transformer and distribution equipment. We welcome bulk procurement, drawing customization and tender cooperation with global EPC contractors and project owners.