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Busbar slot product specifications_Air plug busbar manufacturers
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[Abstract]:
What are the product specifications for the busway?
The enclosed busway is divided by current: 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A, 6300A, 7200A, and so on.
The enclosed busway (referred to as the busbar) is a busbar system consisting of a metal plate (steel plate or aluminum plate), a protective casing, a conductive row, an insulating material and related accessories. It can be made into a plug-in type closed busway with a plug-in junction box at intervals, or a feed-type enclosed busway without a splitter box in the middle. In the power supply system of a high-rise building, the power and lighting lines are often arranged separately, and the busway is installed as one or more turns in the electrical shaft along the wall.
The busway can be divided into three types: air-type busbar slot, dense-insulated busbar slot and high-strength plug-in busway.
High strength enclosed busway (CFW). The process is not limited by the plate, and the outer casing is made into a wrap form, which increases the mechanical strength of the busbar, and the horizontal section of the busbar can be produced up to 13m long. Since the outer shell is made into a wrap form, the position of the pit is intentionally separated and fixed, and there is a distance of 18 mm between the bus bars. The ventilation between the lines is good, so that the moisture proof and heat dissipation function of the bus trough is obviously improved, and it is more suitable for the southern climate; There is a certain gap between them, which causes the temperature rise of the wire to drop, which improves the overload capability and reduces the magnetic oscillation noise. However, it produces stray currents and inductive reactances that are much larger than dense busbars, so its conductive strip sections must be larger than dense insulated plug-in busbars when compared to the same specifications.
Air plug-in busway (BMC). Because the joint between the busbars is soft-bonded with copper, the weather in the south is humid, and the joints are prone to oxidation, forming a poor contact between the joint and the busbar, making the contacts easy to heat, so it is rarely used in the south. And the volume between the joints is too large, the horizontal busbar sections are inconsistent in size, and the shape is not beautiful.
Dense insulated plug-in busway (CMC). Its moisture and heat dissipation effects are poor. In terms of moisture protection, the busbar is susceptible to moisture and water seepage during construction, resulting in a decrease in phase-to-phase insulation resistance. The heat dissipation of the busbar mainly depends on the outer casing. Due to the compact arrangement between the wires and the wires, the heat energy of the L2 and L3 phases is slowly dissipated, and the temperature rise of the busbar slots is formed to be high. Dense insulated plug-in busbars are limited by the outer panel and can only produce horizontal sections of no more than 3m. Due to the small air gap between the busbars, when the busbar passes a large current, it generates strong electric power, which causes the magnetic oscillation frequency to form a superimposed state, causing excessive noise. The plug-in busway is a trunk-type system, which has the advantages of small size, compact structure, reliable operation, large transmission current, convenient tapping and feeding, convenient maintenance, low energy consumption, good dynamic thermal stability, etc. widely used.
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