Modern power supply lines play a very important role like the aorta of the human body, and if something goes wrong, it can have serious consequences. Before the 80s of the 20th century, many stable cables were used in modern construction. With the rapid development of cities, the power load of buildings has increased dramatically, and the limitations such as difficult to disconnect cables and small capacity have become more and more obvious. At this moment, the bus duct with large capacity and convenient branches is widely used in various modern constructions, rather than cables, so let's learn about the six advantages of bus ducts relative to cables in modern construction!
1. Large ampacity and low power loss
The maximum rated operating current of a single bus duct reaches 6300A, which can meet the power demand of the current large load. The maximum rated operating current of a single circuit cable is only 800 amps. The current carrying capacity of the busway is stable, which can avoid unnecessary power loss. The cables are placed in sealed trays in such a way that unnecessary power loss is added.
2. The cooling conditions are good, and the temperature rise is low
The busway is a flat conductor, and the gross insulation material is also a thermal insulation material, which uses air to conduct heat and emit heat, which is emitted through the outer part of the metal shell. Compared with round conductor cables and pre-branch cables, busway has the characteristics of good heat dissipation and low impedance.
3. Foldable and convenient, adaptable
The busway is easy to separate, and when adding equipment, you only need to add a pin box nearby. When adding capacity, simply replace the maintenance unit capacity inside the plug box. After disconnecting the prefabricated disconnect cable, it is necessary to add a long parallel cable between the distribution cabinet and the load from scratch, and it is necessary to block the power supply for normal operation. Faults can affect the safety of adjacent circuits.
Long service life and high safety function
The service life of the bus duct can be more than 30 years, and the operation is relatively safe. Because of the high short-term withstand current, it is possible to equip the plug box of the branch circuit with special maintenance devices such as fuses and circuit breaker maintenance, and there are fewer natural defects in the circuit. The life of the cable is barely more than 15 years, the line aging is simple and faulty, for the tap maintenance of each layer, the power distribution room must be operated and maintained alone.
The device is simple and the maintenance is less in the later stage.
The bus duct structure is small, occupies a small space, and is composed of a special device bracket, which does not require rated support. In routine maintenance, it is only necessary to measure the temperature rise of the shell, new bolts, wire boxes, etc. After the fault, only the faulty plug box needs to be replaced, and the power transmission and distribution of other equipment will not be affected. After decomposition, it can be reused. The cable placement structure is messy, the clear steamer needs to equip the cable tray, the underground routing needs to dig trenches, and the construction cost is high. After the fault occurs, the whole line should be stopped, the replacement cycle is long, and the loss is large.
6. Strong overload capacity and good constant temperature effect
The busway insulation material is made of materials with an operating temperature of more than 100 °C. For example, busway products use DuPont polyester film that is insulated at room temperature up to Class B 130. Together, the busway shell is made of metal, which is simple to burn and has good fire resistance. As mentioned above, compared with the current carrying capacity, safety, service life, energy saving, and convenience of installation, the busway has more advantages than cables. It is believed that in the near future, in industrial plants, high-rise buildings, commercial complexes, rail transit, etc., bus stadiums will be more widely used in our lives, rather than cables.
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