2500A enclosed busbar trunking

2500A enclosed busbar trunking

Structural features:

(1) The outer shell of the bus duct is made of track type aluminum alloy profiles, which are easy to assemble and have a beautiful appearance.

(2) All current level bus ducts adopt the same specification shell, and standard connection terminals are used at the connection points. The common phase enclosed bus has good universality.

(3) Using insulating components to support and separate insulated wires ensures electrical safety and reliability.

(4) Using universal two hole and three hole sockets, it is convenient and fast to lead out branch power supplies.

(5) The socket setting is beneficial for three-phase load balancing.

(6) Provide various on-site installation methods, and users can flexibly use them according to their needs.

The connector of the bus duct should be connected to the side plate of the metal shell end at the same time;

The attached side plate of the two ends should be welded or bolted to the outer shell of the bus duct;

3. There should be no insulation layer at each connection point. For the common busbar, the effectiveness of the protective circuit should be maintained, and the contact area of the connection should not be less than the cross-sectional area of the main line protective conductor.

1. Convenient tapping of busbar trunking: The so-called plug-in busbar trunking refers to its use of plugging to tap the power supply of the main line to the branch line, making tapping very convenient. The disadvantage of cables is that they need to be customized from the factory; The branch connection method adopts an open "C" - shaped clamp. After a long time, can the clamping force be guaranteed? Due to the high cost of each branch head, prefabricated branch cables are still not widely used today. Any floor needs to cut off the power supply, and the bus duct does not need to be powered off. As long as it is unloaded, the plug-in box of the bus duct can be removed. But it is very dangerous to cut off the branch power supply of the prefabricated branch cable while it is live.

2. Strong overload capacity of busbar trunking: The strong overload capacity of busbar trunking depends on the high working temperature of the insulation material used. The insulation material used for busbar trunking is made of materials with a working temperature of 105 ℃. Radiation cross-linked flame-retardant winding tape (PER) and radiation cross-linked hydrocarbon heat shrinkable tube with a working temperature of over 140 ℃ have been developed. The insulation material used in cables generally operates at temperatures of 95 ℃ and 105 ℃, so the overload capacity of bus ducts is much greater than that of cables.

2500A enclosed busbar trunkingThe contact or joint parts of the busbar duct are prone to heating during use, or insufficient consideration of the busbar's current carrying capacity can also cause the busbar duct to heat up. Therefore, when selecting the capacity of the busbar trunking in specific engineering design, it is necessary to fully calculate the actual electrical load of the building, take into account the influence of the surrounding environmental temperature, and leave a margin.

The impact of voltage drop on equipment and potential hazards. So quality control of bus ducts is very important. At present, most projects only have three-phase four wire or three-phase five wire currents. Some projects have added IP protection levels, and important technical specifications should be clearly written on the drawings as much as possible during the design process. High voltage common box bus ducts are used to prevent difficulties in project settlement due to technical parameters and reduce hidden dangers. Review technical content: ① Current specifications ② Protection level IP ③ Short circuit withstand strength ICWKA ④ Ordinary busbar or fire-resistant smoke spreading busbar or fire-resistant busbar ⑤ Temperature rise ⑥ Conductor current interception capability ⑦ Protection circuit continuity, etc If the above 7 technical data meet the technical requirements, the certified product can be used with confidence. The quality control audit of production, inspection of conductors, whether there are instruments for measuring the resistivity of conductors in bus ducts, whether there are voltage withstand test equipment for busbars, whether there are temperature rise test equipment for the current interception capacity of bus ducts, and whether there are test equipment for protecting circuit continuity, all of which have a direct impact on the qualification rate of the production enterprise's products leaving the factory. If these testing equipment are available, it can ensure that the quality assurance of the enterprise's factory products can provide effective basis.

Compared to ordinary wire connection systems, it can save costs and shorten on-site installation time, making the project faster.

2. It provides quick design and multifunctionality, thus increasing flexibility. If future modifications to the busbar are needed, using this wiring system is more convenient than general wire wiring.

3. Because the busbar system is very simple, it is easy to estimate the installation cost based on the combination of design and site. This is because the technical characteristics of this system and the price of each set of busbars are always known, making it easy to inquire about prices in the market.

4. When the distribution busbar passes along the busbar, a shunt point is usually designed at 0.5 or 1M to distribute power along its length. The tap changer unit is inserted in the direction of the busbar to supply the load along the busbar, which may be to provide power to a sub distribution board or in a factory. Tap changers can usually be added or removed from the busbar at any time, allowing for power outages and downtime.

5. Vertical installation in the same system can be used for rising edge power applications. The built-in fire protection measures of the bus duct allow the bus to pass through the floor slab. Setting up protective devices such as fuses and circuit breakers along the busbar reduces the operation of large distribution panels and large loads, allowing for quick installation and configuration of distribution cables for equipment.

6. The system is very compact, thus providing space savings

7. Beautiful, the bus duct can be connected and installed with galvanized, aluminum and other devices.

In high-rise buildings, wiring can be easily implemented, simplifying the entire power system and making the building more aesthetically pleasing.

Functional aspects

The busbar is made of copper or aluminum bars, which have high current density, low resistance, and small skin effect, and do not require derating. A small voltage drop also means low energy loss, saving users' investment. As for cables, due to electricityThe cable core is a multi strand thin copper wire with a root area larger than that of busbars of the same current level. Moreover, its "skin effect" is severe, reducing the additional value of current, adding voltage drop, and reducing heat generation. The energy loss of the line is significant and it is prone to aging.

Adopting a typical "sandwich" structure, it is a flexible, safe, and reliable power transmission and distribution system with reasonable design and excellent performance. It has the characteristics of stability and reliability, high distribution efficiency, good heat dissipation, voltage reduction, high mechanical strength, small space occupation, and convenient and fast installation.

The conductors inside the bus duct are insulated and tightly arranged using a new integrated wrapping process, and are stacked together to form a compact structure for overall heat dissipation. The molded aluminum alloy enclosed shell not only has high mechanical strength, but also excellent corrosion resistance and heat dissipation, and can be used as a grounding conductor. This structure can effectively balance the impedance of each phase, thereby greatly reducing the voltage loss of the bus duct system.