The connection of bus bars to voltage distribution devices at all levels in the substation, as well as the connection of electrical equipment such as transformers and corresponding power distribution devices, mostly uses bare conductors or stranded wires with rectangular or circular sections, which are collectively called bus bars. The online teaching of electrical design is taught by the birds on trees.

Bus duct is a power distribution device with high efficiency to transmit current, which is especially suitable for the economic and reasonable wiring needs of increasingly high buildings and large-scale factories. With the emergence of modern engineering facilities and equipment, the power consumption of all walks of life is increasing rapidly, especially the emergence of numerous high-rise buildings and large workshops. The traditional cables as transmission conductors can no longer meet the requirements in the large current transmission system. The parallel use of multiple cables has brought a lot of inconvenience to the on-site installation, construction and connection.

What is the difference between busbar and bus duct? Busbars and bus ducts are actually closed one by one. Enclosed bus is called bus duct for short, that is to say, bus duct is the vest of enclosed bus. Enclosed bus and bus duct refer to the same thing. The bird on the tree educates Mr. Di in online teaching of electrical design. Enclosed bus is a bus system consisting of metal plate (steel plate or aluminum plate) as protective shell, conductive bar, insulating material and relevant accessories. It can be made into a plug-in enclosed bus with a plug-in junction box at an interval, or a feeder enclosed bus without a junction box in the middle. It refers to the bus which adopts metal enclosure to enclose the main bus.

Enclosed bus has the following advantages:

1) It is conducive to standardization and good interchangeability.

2) The enclosed enclosure is generally made of non-magnetic or weak magnetic materials to reduce heating.

3) The bus is enclosed, and the anti pollution ability of the system is improved, which is suitable for areas with serious dust and high air humidity, such as coal, paper making, chemical industry, etc. Enclosed bus can be divided into dense insulated bus and air insulated bus. It is applicable to three-phase four wire system or three-phase five wire system power supply and distribution lines with rated working voltage of 660V and rated working current of 250~2500A. The frequency is 50Hz. It has a series of characteristics such as compact structure, high insulation strength, large transmission current, good interchangeability, stable electrical performance, easy installation and maintenance, and long service life. It is widely used in power supply and distribution system connection of industrial and mining enterprises, high-rise buildings and public facilities.

The open bus is called bus for short, which refers to the connection of voltage distribution devices at all levels in the substation, as well as the connection of electrical equipment such as transformers and corresponding distribution devices. Generally, bare conductors or stranded wires with rectangular or circular cross-section are used, which are collectively referred to as ordinary buses. They are generally used for connection between combined distribution cabinets. They are hidden in the combined cabinets, so they are relatively safe.