The rectangular bus has good heat dissipation performance and is easy to fix and connect. But its skin effect is quite large. In order to reduce the skin effect, the cross-sectional area of a single busbar should not exceed 1250 square millimeters. When the working current exceeds the promised current of a single bus, 2 to 4 rectangular buses can be used. Rectangular conductors are generally only used for distribution lines with currents below 4000A.
The trough bus has good mechanical strength, large current carrying capacity and small skin effect coefficient. The power distribution device generally uses a trough busbar, and its current is between 4000A and 8000A.
The tubular bus has a small skin effect coefficient and high mechanical strength, so that water and wind can pass through the pipe. It is a high-current bus capable of passing currents above 8000A.
According to the raw materials, the bus bar is divided into copper bar, aluminum bar, and copper-clad aluminum bar.
Copper has the advantage of high electrical conductivity and high mechanical strength. In addition, it is corrosion-resistant and easy to process, making it a good conductive material. However, copper has a limited storage capacity and is widely used in other occupations. Therefore, in the application of electricity, except for some special skill requirements that require the use of copper busbars, aluminum replaces copper. Aluminum busbars are generally used in power occupations. Aluminum is second only to copper in terms of electrical conductivity. Aluminum is lightweight, low cost and high production efficiency. Overall, aluminum busbars are more economical than copper busbars.
Copper-clad aluminum busbar is a hot metal composite conductor material that has an aluminum core coated with copper. It has the advantages of both aluminum and copper, namely the superior electrical conductivity of aluminum and the chemical stability of copper. Copper-clad aluminum busbar has a broad development space in the electrical field and can be used for various electrical equipment. In particular, copper-clad aluminum busbars are the aspirational selection of busway. Because the power saved by copper-clad aluminum busbar is limited, its manufacturing cost has dropped significantly. What's more, it reduces the weight of the product and makes the installation easier.
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More on that
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Distribution cabinet bus calculation method - Vilna
1. The main bus at the upper end of the low-voltage distribution cabinet is calculated according to the material and cross-section in the extension meter. The bus bar connected to the main bus at the upper end of the switch is not accounted for and is included in the low-voltage distribution cabinet.
2. The transformer mainly depends on how large the load is, according to your switchgear can be calculated to match the transformer, but not the same...
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Wiener fixed and busbar mounting
Precautions for the device
VDE 0660 Specification Section 107 / EN 60947-3 Specification / IEC 60947-3 Specification
3 poles are broken at the same time, double breakpoints.
Operator-independent, safe opening/closing, in position ...
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What is the role of the busbar in the distribution box
Busbar refers to a product made of copper and aluminum materials with high conductivity to transmit electrical energy and have the ability to gather and distribute electricity. The main conductor used by the power station or substation to transport electrical energy. In the power system, the busbar in the distribution box connects the various current-carrying branch circuits in the distribution unit, ...
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The way in which the Wiener high-voltage busway is selected
In the selection, the following elements should be fully considered: fire protection specifications, insulation layer to flame retardant, good temperature resistance, high temperature is not easy to release harmful gases, structure type to avoid chimney effect, should give priority to the use of aggregate insulation layer bus duct, such as the use of air insulation type, it must be in the electric ...
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Ship unloader distribution cabinet convergence mode - Wiener
In the hardware layout planning of the ship unloader distribution cabinet, in order to omit the wiring slot pawn, save time and effort in wiring, prevent wiring errors, and make the distribution cabinet beautiful and useful, the circuit breaker inlet end in the distribution cabinet will use the confluence method. Here are a few commonly used ways to combine the flow with Siemens circuit breakers.
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Characteristics of the common box closed busbar - Wiener
The common box closed bus includes the non-phase isolated, common box closed bus, phase isolated common box closed bus and AC and DC excitation common box bus, which are used for current transmission between the generator lead wire below 100MW and the low-voltage side of the main transformer or between the low-voltage side of the transformer and the high-voltage distribution device of the unit of 75MW and above.
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The difference between the busbar system and the traditional wiring
The advantages of the busbar system are:
1. The Wiener bus system adopts the bus bar non-perforation connection technology, and the electrical components are firmly connected to the busbar;
2. It saves the device space, saves the redundant wiring, saves the device time and labor;
3. The busbar ...
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Tubular busbar structure layout - Wienal
1. The tubular bus is in the form of a split-phase fully insulated shielded copper tube bus.
2. The cylindrical capacitor structure is selected, and the voltage equalizing capacitor layer, the main insulation layer, and the bottom layer of the shielding street are set between the conductor and the insulating sheath, and the shielding grounding layer on the outside is connected to the grounding grid. The quantity of each layer is determined by the seller.
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Wiener busway plug-in box wiring method
The bus duct bracket has to be firmly installed, and the bus duct should be correctly placed according to the segment sequence number, phase sequence, number, direction and device mark, and when the sections are connected, the adjacent section of the bus duct should be aligned, and the conductor and shell of the bus duct should not accept mechanical stress after the connection.
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Busway installation waterproofing work - Vernal
Most of the bus duct is the design standard for indoor use, so even if the humidity in the indoor air is relatively high, it will not have much impact on the operation of the busbar, but the bus duct enters the water during the use of the busway, which will definitely cause a certain degree of impact.
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Scope of application of busbar - Wiener busbar system
Busbars are divided into hard busbars and soft busbars.
According to its different shapes, hard buses can be divided into: rectangular busbars, tubular busbars, trough busbars, diamond busbars and so on.
Rectangular busbars are the most commonly used busbars and are also busbars. ...
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Composition of medium and low voltage bus protection - Wiener
On the medium and low voltage side of the main transformer, the bus tie switch and the original electromagnetic relay maintenance DC circuit of each outlet, the PLC is used for logical comparison to determine whether it is a fault in the maintenance area or a fault outside the area.
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Corrosion type of tubular busbar - Wiener
1. Crevice corrosion
When there is a gap between the surface of the tubular bus itself and other things, the corrosion in the gap will be accelerated due to the difference in the effect of the inflatable battery, but there is no effect on the outside of the gap. However, crevice corrosion has little to do with the type of alloy, because even very corrosion-resistant ...
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Some of the Wiener series models
05802 Insulator with female thread, bolt, M8, height 35mm
08824 Platen connector for PE- and N-busbar 01 932
08825 Snap-on fastener, for PE- and N-busbars 01126-01129 and 019 ...
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Introduction to the Wiener 3-pole adapter
1、32590
EQUES®30Compact
Bus adapter 32 A
1 adjustable support rail
45 x 160 with conductor AWG 10 (6 mm²)
2、32591
EQUES®30Compact
Bus adapter 63 A
1 ...
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Uses and characteristics of detached closed busbar - Wiener
Closing busbars include out-of-phase shut-off buss, co-box (including co-box phase isolation) shut-off busbars and cable busbars, which are used for power plants, substations, industrial and civil power supply leads.
Phase-off busbar
1. Usefulness
Out of phase ...
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Phase of the busway in the low-voltage incoming line – Wiener
According to the requirements of the relevant specifications, the placement of the three-phase busbar can be roughly divided into two kinds according to the model of the low-voltage distribution cabinet and the different manufacturers: horizontal placement and placement of the down wire, according to the order of placement.
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The difference between busway and busbar - Vernal
The busway and busbar are actually closed one after the other, and the other is not closed.
Closing the busbar is referred to as the busway, which means that the busway is the vest that closes the busbar, and the closing busway and the busbar refer to the same thing.
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Application of busway – Wiener
The busway system is an efficient power distribution device, especially suitable for the needs of high-rise buildings and large-scale factories for reasonable wiring. With the presentation of modern engineering equipment and equipment, the electricity consumption of all walks of life has increased rapidly, especially many high-rise buildings and large factories. Traditional cables serve as ...
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The busway phase in the low-voltage incoming line - Wiener
According to the requirements of the relevant specifications, the placement method of the three-phase busbar can be roughly divided into two kinds according to the model of the low-voltage distribution cabinet and the different manufacturers: the horizontal placement and the placement of the down wire.
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