3200A enclosed insulated bus duct

3200A enclosed insulated bus ductThe connection of voltage distribution devices at all levels in substations, as well as the connection of electrical equipment such as transformers and corresponding distribution devices, mostly uses bare or stranded wires with rectangular or circular cross-sections, which are collectively referred to as busbars. The function of a busbar is to collect, distribute, and transmit electrical energy. Due to the large amount of electrical energy passing through the busbar during operation, the enclosed busbar trunking bears significant heating and electrodynamic effects during short circuits. Therefore, it is necessary to select busbar materials, cross-sectional shapes, and cross-sectional areas reasonably to meet the requirements of safe and economical operation. Busbars are divided into hard busbars and soft busbars according to their structure. Hard busbars are divided into rectangular busbars and tubular busbars. Rectangular busbars are generally used from main transformers to distribution rooms. Their advantages include easy construction and installation, minimal changes during operation, and high current carrying capacity, but they are relatively expensive. Soft busbar is used outdoors, and due to the large space, the swinging of the wires will not cause insufficient distance between the wires. The vast majority of electrical accidents caused by bus ducts are due to the installation of connectors and inadequate protection levels. The protection level of busbar trunking not only refers to the protection level of the busbar body, but also includes the protection level of the installation connection head. At present, there are many bus ducts on the market, with a marked protection level of IP54. IP65、IP66， The protection level of the busbar body can meet its requirements, but the protection level of the connector can only reach IP30 or IP40. Therefore, the design and processing of the connector is a crucial factor. If the connector seal is not good, no matter how high the protection level of the busbar body is, it cannot truly and effectively protect the safe operation of the busbar trunking.

3200A enclosed insulated bus ductWhen the construction reserves openings for one or more sets of bus ducts. When the opening size is larger than the actual required size, it is responsible for filling the opening according to the actual needs to meet the requirements of the bus duct manufacturer. The platform/wall and cover plate of the bus duct also need to be appropriately revised according to the actual environment of the construction site, so that the bus ducts do not overlap with each other. The interface of the bus duct should be safe and tight, with a three-phase five wire bus duct, and the power should not be turned off when testing the interface. At the same time, the interface also needs to have protection and prevent moisture infiltration. When the bus duct is close to the ceiling or wall, the bolts of the interface only need to be tightened at any convenient location in the bus duct.

In the power supply system of high-rise buildings, the power and lighting lines are often set separately, and the busbar is installed vertically along the wall in the electrical shaft as the main power supply line. According to the purpose, a busbar trunking generally consists of a starting busbar trunking, a straight through busbar trunking (with and without sockets), an L-shaped vertical (horizontal) bent busbar, a Z-shaped vertical (horizontal) offset busbar, a T-shaped vertical (horizontal) three-way busbar, an X-shaped vertical (horizontal) four-way busbar, a variable capacity busbar, an expansion busbar, a terminal head, a terminal junction box, a plug-in box, busbar related accessories, and fastening devices. Bus ducts can be divided into three types according to insulation methods: air type plug-in bus ducts, dense insulation plug-in bus ducts, and high-strength plug-in bus ducts. High strength enclosed bus ducts

1. Reduce grounding faults and avoid phase to phase short circuits. Enclosed busbars with enclosures can prevent grounding faults caused by external moisture, dust, and foreign objects. Adopting phase to phase enclosed busbars also prevents the occurrence of phase to phase short circuits.
2. The use of shell shielding for steel structure heating isolated phase enclosed busbars can fundamentally solve the problem of induced heating in steel structures.
3. Reduce the short-circuit electromotive force between phase conductors due to the dual shielding effect of eddy currents and circulating currents on the outer shell.
4. Improve the safety and reliability of operation. The pot type insulators in this factory are pressed with SMC to form a busbar enclosure, which prevents insulator condensation. At the same time, hydrogen and temperature measuring devices are used, and the measurement signals can be displayed on site or transmitted to the DCS system to improve the safety and reliability of operation. After the busbar enclosure, it also creates conditions for the use of ventilation cooling.
5. The enclosed busbar is produced by the factory in a complete set with guaranteed quality, low operation and maintenance workload, easy construction and installation, and no need to set up mesh barriers, simplifying the requirements for civil engineering.

In the power supply system of high-rise buildings, the power and lighting lines are often set separately, and the busbar is installed vertically along the wall in the electrical shaft as the main power supply line. According to the purpose, a busbar trunking generally consists of a starting busbar trunking, a straight through busbar trunking (with and without sockets), an L-shaped vertical (horizontal) bent busbar, a Z-shaped vertical (horizontal) offset busbar, a T-shaped vertical (horizontal) three-way busbar, an X-shaped vertical (horizontal) four-way busbar, a variable capacity busbar, an expansion busbar, a terminal head, a terminal junction box, a plug-in box, busbar related accessories, and fastening devices. Bus ducts can be divided into three types according to insulation methods: air type plug-in bus ducts, dense insulation plug-in bus ducts, and high-strength plug-in bus ducts. High strength enclosed bus ducts

It depends on the protection level of the bus duct. If the protection level is high, a small amount of water will not cause much damage to it. If the protection level is low, the water must be cleaned before use, otherwise a short circuit may occur. The protection level is IP, for example, the larger the number IP65, the higher its dust and water resistance.

This series of busbar masts has excellent short-circuit resistance performance. Due to the protection of the aluminum (or weak magnetic steel plate) shell, it can effectively reduce the structural heating caused by eddy currents or circulating currents, lower the temperature of the busbar duct shell, reduce electrical energy loss, improve current carrying capacity, and reduce electric power.

This series of busbar trunking has an advanced structure, and installation and maintenance holes can be arbitrarily set at the upper or lower part of the busbar trunking. For high current indoor busbars, ventilation louvers are installed at the two sides and lower part of the shell To enhance heat dissipation and reduce temperature rise.
Adopting double insulation and multi-point connection grounding of the shell significantly reduces maintenance work and improves safety performance.
Adopting corrugated pipe expansion joints, it is easy to install and can adjust two degrees of freedom in horizontal and vertical directions, which can not only meet the expansion and contraction requirements caused by different temperature drops and thermal expansion and contraction It can also compensate for errors caused by foundation settlement, solving the disadvantages of poor protection level, complicated installation, and unreliable operation of traditional skateboard type expansion devices.
In order to address the negative impact of screen movement on the busbar during the operation of transformers, generators, and distribution cabinets, soft connections or copper braided tapes are used outside their connection to the busbar trunking, and rubber pads are added between the external chargers to reduce vibration; For the busbar trunking body, a damper is installed in the system to provide elastic support for the porcelain bottles and conductive bars, effectively avoiding mechanical and ground wave damage to the enclosed busbar caused by the shell.

Multiple protective structures are used to wrap the conductive row, such as wrapping insulation film on the upper and lower arms of the conductive row to ensure the overall insulation of the conductive row. In addition, a sealing strip is further provided between the connection side sealing plate and the connection cover plate to increase the sealing performance of the two assembled together. At the same time, the upper and lower cover plates and side plates are made of non-magnetic alloy materials, greatly reducing the electromagnetic wave radiation generated during the operation of the conductive bars. A heat sink is also added between the two conductive bars, and the surface of the conductive bars is also equipped with several heat dissipation fins to improve the heat dissipation efficiency of the conductive bars.