When users use the distribution cabinet, they must understand the circuit device of the busbar, and many users are not very well understood, so let's talk about the bus connection mode of the distribution cabinet.
The bus bar is used for the connection of internal and external electrical equipment in the distribution cabinet, which is different from the wire, most of which are bare, without insulation, and the bus bar is rectangular or coil-shaped. Sheet metal is commonly used, and the most common is aluminum.
Because the current determines the size of the busbar. Because of the different voltages, different distance and insulation requirements, it is divided into high-voltage bus and low-voltage bus.
The busbar is fixed to the insulator. Its terminal is usually fixed with bolts, in order to compensate for temperature changes and machining errors, a long slot hole is processed on the busbar and is usually fixed with a splint or a clamping plate in the central supporting part, which can avoid punching holes on the busbar, but the clamping plate is not too strong and simply announces the sound of bus vibration. The splint must not form a magnetic circuit to prevent iron loss. When connecting the busbar to the busbar, the same material should be used. If copper and aluminum are connected, a copper-aluminum transition plate should be used.
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Advantages and disadvantages of bus full differential protection
Thorough differential maintenance of the bus is to connect the current transformer of all the connecting elements on the bus to the differential circuit according to the same name phase and polarity, the characteristics and transformation ratio of the current transformer should be the same, if the transformation ratio can not be together, the compensation converter can be used to compensate, satisfactory ΣI=0.
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Use and characteristics of AC busbar systems – Wiener
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Characteristics of power system bus wiring mode
(1) Single bus wiring. Single bus wiring has the advantages of simple and clear, less equipment, less investment, convenient operation and expansion, but its reliability and activity are poor. When the bus or bus divider is faulty or overhauled, it is necessary to disconnect all power to the bus.
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Applications in the power of busbar systems – Vernal
The bus refers to the connection of voltage transformers and other voltage distribution devices at all levels in the substation, as well as the connection of electrical equipment such as transformers and corresponding distribution devices, and most of the bare wires or stranded wires with rectangular or circular cross-sections are selected.
Follow the lines ...
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Classification of the use of different places in the busway - Vernal
(1) General bus duct
Non-flame retardant and non-fire-resistant bus duct used in general load power distribution. In the event of a fire during a short circuit, it will always incinerate to other connected busbars, which may briefly cause fire accidents.
(2) Flame retardant bus duct
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The service life of the lighting power busway – Wienal
The system consists of a current box, a bus body, a branch plug and device accessories.
When the heat dissipation of conductive copper strip is effectively improved, the contact between the copper strip and the inner wall of the tube is reduced, the insulation resistance and anti-aging ability of the tube body are strengthened, and then the service life of the tube body is extended. The longevity of the tube far exceeds ...
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The innovation of Wiener 185Power in the low-voltage main distribution system
The new base system adapter creates a new type of solution in combination with the 185Power system, which was not possible before. CrossBoard® products can be easily connected to the adapter of the base system via the CrossLink® interface. Components of DIN support rails, e.g. fuses ...
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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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Precautions for busway installation
1. Requirements for civil engineering before installation
1. The foundation, frame, reserved holes and embedded parts meet the planning requirements of electrical equipment.
2. After the construction of the roof and floor slab, there shall be no leakage.
3. After the indoor above-ground construction is completed, mark the leveling elevation on the wall on the ground.
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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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Rectangular busbar, trough busbar, and tubular busbar analysis
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 conductor a ...
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Busbar system in detail – Vernal
1. In the 60mm bus system, the square fuse type blocking switch can be directly hooked.
2. The 60mm bus system refers to the three-wire or four-wire bus spacing of 60mm.
3. Strip NH-fuse type load barrier switch with scale 00 ...
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Types of corrosion of Wiener tubular busbars
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Difference Between Busbar and Cable in Power System – Wiener
Busbar refers to a product made of copper (copper bar) and aluminum materials with high conductivity to transmit electric energy and have the ability to gather and distribute electricity. The main conductor used by the power station or substation to transmit electrical energy. Through it, the electrical energy output from generators, transformers or rectifiers is delivered to individual users.
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Analysis of the conditions for the use of sealed busbars - Wienal
Ambient air temperature: turn off the busbar system to benchmark the ambient air temperature; Unless otherwise ruled, the manufacturer should give an additional current to shut down the busbar system at a base ambient air temperature of 35°C; If applicable, the manufacturer should give an additional coefficient k: (K1=1 at 35°C) in order to determine the size of the package.
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Vernal fuse replacement method
1. Prepare for replacement. For example, construction personnel should wear labor protection equipment, such as insulating gloves.
2. Determine the type of fault. Check the distribution box with a test pen first, and after making sure that there is no leakage, open the door of the distribution box. Then use a voltage tester to detect the three-phase power supply, if the three-phase ...
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Wiener DC power supply busway classification
In general, the DC power supply system is composed of a communication screen, a rectifier screen, and a DC screen. After selecting a dense bus duct, it is necessary to adjust the conventional DC power supply system: one or two large-capacity DC split-screens are installed in the communication room, and a large loop output is set in the DC split-screen; In the power room ...
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Busway installation method - Wiener
1. Busway horizontal device, the interval between the two brackets is ≯2500mm, and the interval between straight devices is ≯3600mm;
2. When the device bracket is straight, it should be drilled with the channel side plate and fastened with M6-M8 bolts.
3. In the process of installation construction, priority should be given to the power supply system, ...
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Application and technical requirements for bus protection on the low voltage side - Wiener
1. The use status of bus maintenance on the low-voltage side
According to the national standard "Code for Relay Maintenance and Automatic Equipment Design of Power Equipment" (GB50062-92): about the 3-10kV bus and the double bus running in parallel of the power plant and the primary substation, as long as the following conditions are installed.
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Bus load forecasting method and characteristics - Wiener
Bus load guessing is a kind of power system load guessing, and the bus system load can be defined as the sum of the terminal load supplied by the main transformer of the substation to a relatively small power supply area, which is the refinement of the system load. Bus load guessing generally only carries out short-term load guessing, and the result is ...
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