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Busway (Bus Duct)
4 Series · 27 Models
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Busway (Bus Duct) Overview
Busway (bus duct) systems distribute high-current power from transformers and switchgear to loads using compact, low-impedance busbar construction. QDTB offers dense (sandwich), air-insulated and fire-resistant busway rated 250–6300 A at 380/400/690 V, with copper or aluminum conductors and plug-in tap-off units, for data centers, industrial plants and commercial buildings.
Available Series
Dense Busway Series
Dense (sandwich-type) busway distributes high-current power from transformers and switchgear to loads with compact, low-impedance busbar construction. Rated 250–6300 A, 380V/400V/690V, with copper or aluminum conductors, insulated busbars in a compact housing, and plug-in tap-off units for flexible load connection in data centers and industrial plants.
Air-Insulated Busway Series
Air-insulated (air-type) busway uses busbars separated by air gaps within a ventilated or non-ventilated enclosure, providing high short-circuit withstand and ease of inspection. Rated 250–6300 A, 380/400/690V, suitable for industrial power distribution where ventilation and simple maintenance are preferred over compact dense construction.
Fire-Resistant Busway Series
Fire-resistant (fire-rated) busway maintains circuit integrity under fire for emergency power supply to fire pumps, smoke exhaust and life-safety loads. Rated 250–4000 A, 380/400V, with fire-resistant insulation and mineral/mica barriers, built to JB/T 10327 fire-resistant busway requirements for building emergency distribution.
HV Enclosed Busbar Series
High-voltage enclosed busbar (isolated phase bus duct) connects generators, transformers and switchgear at 10–35 kV, with each phase enclosed in its own grounded metal housing for safety and low field emissions. Rated 10–35 kV, 1000–8000 A, for power plants and large substations.
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| Base price (interpolation) | $975 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
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Application Scenarios
Data Centers & Server Halls
High-current distribution with plug-in taps for server racks and power modules.
Industrial Plants
Feeds process lines and machinery with low voltage-drop busbar.
High-Rise Buildings
Vertical risers carrying power to floors and tenants.
Transformer-to-Switchgear Feeders
Connects transformers to low-voltage switchgear with minimal footprint.
Technical Advantages
Dense (Sandwich) Construction
Tightly stacked busbars for low impedance and low voltage drop.
Fire-Resistant Option
Mineral/mica barriers maintain circuit integrity under fire for life-safety loads.
Plug-In Tap-Off Units
Loads can be added or moved without de-energizing the main bus.
Copper or Aluminum
Conductor material selected for conductivity or cost.
FAQ - Busway (Bus Duct)
What is dense busway?
How are loads tapped from busway?
What is the typical current range?
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