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Difference between insulated tube bus and copper bar
2022.01.15 Views:237

In modern power construction, in order to meet the requirements of large current transmission, the conductors of new buses are gradually used as the power grid connection to ensure the stability and safety of power transmission. In addition, the disadvantages of traditional bus conductors in power grid construction are gradually highlighted, and new bus products such as tubular bus, sealed bus, and cast bus appear, which are loved and recognized by the majority of users.

tubular busbar

Insulated tubular bus is a bus product that uses copper tube or aluminum alloy tube as conductor and external insulation. The official name is "tubular bus". It has large current carrying capacity, good insulation performance, high mechanical strength, good heat dissipation, low temperature rise, strong resistance to electrical shock, no environmental interference, high reliability, simple bus structure, clear layout, convenient installation The maintenance workload is less.

The application of insulated tube bus in China started late, and it has only been more than ten years since 2004. However, the demand for equipment has grown steadily, and the application fields have expanded to power grid, power generation, petroleum, chemical industry and other industries. In particular, China has a large population density, concentrated power consumption areas, and there has always been a demand for large capacity transmission, which makes the insulated tube bus with strong current transmission capacity have great development space at 35KV and below voltage levels.

Rectangular copper bus

The copper busbar generally refers to copper busbar, which is a kind of rectangular busbar. Different from tubular busbar, the conductor of tubular busbar adopts hollow tubular structure, which can also be divided into copper tubular busbar and aluminum tubular busbar. The rectangular bus adopts long conductors with rectangular or chamfered (rounded) rectangular section, which are divided into copper bus bar (copper bus bar) and aluminum bus bar (aluminum bus bar). It is an indispensable conductive material for manufacturing motor windings, high and low voltage electrical appliances, switch contacts, and conductors for power supply and distribution installation.

What are the advantages of insulated tubular buses over rectangular buses?

First of all, the current carrying capacity of insulated tube bus is relatively large. The insulated tube bus uses hollow copper tubes or aluminum or aluminum alloy tubes as conductors and is covered with an insulating layer. Compared with conventional rectangular bus, the surface of insulated tube bus conductor is larger and the current density distribution is more uniform. According to data, the maximum rated current of insulated tube bus can reach 12000A, This is beyond the reach of rectangular buses.

Second, in terms of mechanical strength: the allowable stress of the main body of the insulated tube bus is 4 times that of the rectangular bus, which can withstand high short circuit current and high mechanical strength, making the maximum span of the bus support up to 8 meters.

Third, in terms of heat dissipation and corrosion resistance: the insulated tube bus is a hollow conductor, with ventilation holes at both ends of the bus. The inner diameter air duct can naturally form hot air convection, and the heat dissipation condition is better than that of conventional bus. The main insulation material of the bus bar of Guangdong high voltage epoxy resin cast insulation pipe is epoxy resin, which has excellent electrical performance and chemical stability, low dielectric loss, flame retardancy, aging resistance and corrosion resistance. The product can be used normally for more than 30 years.

Fourth, in terms of installation and maintenance: the structure of insulated tube bus is simple, the layout is clear, and the installation is relatively simple. The amount of cleaning and maintenance work in the later period is also less!

After this comparison, it is not difficult to find why insulated tube bus will replace rectangular bus and become a popular product in power construction! For more information on insulated tube bus, please consult Guangdong High Power Technology Co., Ltd, With 30 years of practical experience in the bus industry, the company has rich experience, mature technology, guaranteed quality, and professional production equipment. It can quickly produce and ship according to customer needs, meet the needs, and the manufacturer quotes.