Types Of Tap-off Boxes

As a core branch power distribution component of the busway system, the busway tap-off box undertakes the key function of trunk power transmission and shunting. It acts as a power distribution hub connecting the main busway trunk and downstream electrical equipment, which accurately converts the high current transmitted by the busway into the current grade suitable for branch equipment. Divided into two major types: plug-in type and fixed type, it meets diverse installation requirements while balancing safety, high efficiency and convenience.

The plug-in tap-off box adopts a modular pluggable design, featuring outstanding flexibility and convenience. It can be quickly installed, disassembled and replaced without cutting off the power supply of the main busway, greatly improving operation and maintenance efficiency. Equipped with dedicated plugs that precisely match the busway sockets, the plug-in parts are tin‑plated to ensure tight contact and reliable conductivity. Meanwhile, a built-in mechanical interlock device eliminates safety hazards such as electric arcs caused by on-load plugging and unplugging. With a protection rating of IP40 and above, it effectively prevents dust ingress and misoperation. This type is ideal for scenarios with frequent load adjustment and flexible capacity expansion, such as equipment modification in production workshops and commercial mall upgrading. It allows flexible addition or reduction of branches to reduce circuit renovation costs.

The fixed tap-off box is connected by bolt fastening, forming a stable integrated structure with the busway after installation. It features a compact structure, strong seismic performance and no loose risks, making it suitable for power distribution scenarios with stable loads and no long-term adjustment demands, such as high-rise building shafts and fixed power supply for data center cabinets. Built-in circuit breakers or fuses provide dual protection against overload and short circuit, which can quickly cut off faulty circuits and avoid impacts on the main busway system. Its housing is made of high-quality steel or aluminum alloy, delivering excellent corrosion resistance and durability to extend service life.

Both models support customization of multiple current specifications, covering a wide current range from 16A to 1600A. Internal components can be configured as required, ensuring full compatibility with dense type, air-insulated and other mainstream busway systems. Adhering to strict safety compliance standards, we continuously optimize structural design to ensure superior electrical performance and protection performance of all tap-off boxes. We provide professional and reliable branch power distribution solutions for various application scenarios, ensuring efficient, safe and stable operation of the overall power distribution system.