Busway, a closed metal device composed of copper and aluminum busbars, is used to distribute large power to various components of a distributed system. In indoor low-voltage power transmission trunk projects, it has increasingly replaced wires and cables.
In developed countries abroad, and in China'sHong Kong, Macau, etc., it has been popularized. In Guangzhou, Guangdong, China, for buildings above 12 floors, more than 90% of the main lines from the power distribution room to the floors use busway; 630KVA transformers to distribution cabinets use busway.
Chinese Name
Busway
Foreign Name
busway/bus duct
Includes
Composed of copper and aluminum busbars
Belongs to
Various components of distributed systems
A new type of conductor formed in the middle. In Japan, practical application began in Showa 29 (1954), and since then busway has developed. Today, it has become an indispensable wiring method in electrical equipment and power systems in high-rise buildings, factories, etc. Due to the increasing power needs of buildings, factories, and various constructions, and the trend of these needs growing year by year, the original circuit wiring method, i.e., the conduit method, brings many difficulties during construction, and when changing the power distribution system, it is almost impossible to simplify it. However, if busway is adopted, the goal can be achieved very easily, and it can also make buildings more aesthetically pleasing. Economically, the busway itself is more expensive than cables, but compared with various accessories for wiring and the entire power system, using busway can make construction costs much cheaper (see the diagram), especially in cases of large current capacity, where this advantage is even more obvious.
With the emergence of modern engineering facilities and equipment, the electricity consumption of various industries has increased rapidly, especially with the appearance of numerous high-rise buildings and large factory workshops. Traditional cables as power transmission conductors can no longer meet the requirements in high-current transmission systems. The parallel use of multiple cables brings many inconveniences to on-site installation and connection. Plug-in busway emerged as a new type of power distribution conductor.
Compared with traditional cables, it fully demonstrates its superiority in high-current transmission. At the same time, due to the adoption of new technologies and processes, the contact resistance and temperature rise at the connections at both ends of the busway and at the plug-in points of the tap-off outlets have been greatly reduced. High-quality insulating materials are used in the busway, thereby improving the safety and reliability of the busway and making the entire system more complete.
