Performance
The busbar is made of copper or aluminum, which has high current density, low resistance and small skin effect, so no derating is required. Small voltage drop means small energy loss, which ultimately saves the user's investment. As for the cable, since the cable core is a multi-strand thin copper wire, its root area is larger than that of the busbar of the same current level. And its "skin effect" is serious, which reduces the current rating, increases the voltage drop, and is easy to heat. The energy loss of the line is large and it is easy to age.
Safety
The metal-enclosed casing of the busway can protect the busbar from mechanical damage or animal damage. It is very safe to install plug-in units in the power distribution system. The casing can be grounded as a whole, and the grounding is very reliable. The PVC casing of the cable is vulnerable to mechanical and Animal damage, the power must be cut off when installing the cable. If there is an error, it will be very dangerous, especially the cable must be grounded on site, and the unreliable grounding will increase the risk.
Installation
The busbar consists of many segments, each of which is short and light in length. Therefore, installation can be completed quickly with only a few people. Busbars have many standard parts and stocks, which can be shipped quickly to save on-site work time. Its tight "sandwich" structure reduces electrical space, freeing up more space for commercial use, such as rental or as a public space. For installing cables, it is a difficult job. Because individual cables tend to be heavy, installation requires the collaboration of many people and takes a long time to complete. In addition, due to the bending radius of the cable, more installation space is required.
Line optimization
By using bus ducts, we can combine some branch circuits and convert them into one large bus duct with a plug-in box. It simplifies the electrical system and obtains more strands with lower current values. Therefore, the construction cost of the project is saved, and the maintenance is easy. For traditional cable lines, cables make the electrical system extremely complex, bulky, and difficult to maintain, thus wasting engineering costs and installation space.
Scalability
For the bus, the system expansion can be completed by adding or changing several sections, and the reuse rate is high. And most of the time, the cables cannot be reused because the lengths and routes are different, and if we want to expand the system, we have to buy new cables to replace the old ones.
Plug-in switch box
The plug-in switch box can be used with the air type busway. No additional accessories are required for installation. The connector is the most important part. It is made of copper alloy stamping, which is heat-treated to enhance elasticity, and the surface is tin-plated. Even if it is plugged for more than 200 times, it can still maintain stable contact ability. The box body is set with a grounding point to ensure reliable grounding, and a switch circuit is set in the box. The use of molded case circuit breakers can protect the capacity of the tapped line from overload and short circuit.
