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: the horizontal placement and the placement of the down conductor, according to the order shown in Figure 1. From the front of the cabinet, the horizontal placement from front to back is N, L3, L2, L1. From left to right, the placement of the down leads is LI, L2, L3, and N.
On the other hand, as we all know, the order of the low-voltage bushing of the transformer is N, L1, L2, L3, and the transformer is installed in the transformer room according to the design requirements, generally the high-voltage side is inward, and the low-voltage side is outward. When the incoming bus of the low-voltage distribution cabinet is placed horizontally, there is no need to commutate between the bus duct and the transformer, only the transition splice needs to be added, but when the incoming bus of the low-voltage distribution cabinet is placed under the lead, because the bus duct of different phases can not be directly used as a low-voltage incoming line to connect the transformer and the low-voltage distribution cabinet, so the bus duct can only be connected through commutation. The method is: it can be connected through the bus duct phase change section, or the incoming auxiliary box can be selected (it can be installed on the top of the cabinet, and the bus transposition in the box (generally to make the zero bus transposition), and the equipment at both ends of the bus duct is correctly connected with the phase.
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Introduction to the classification of busway - Wiener
According to the different uses of the bus duct, the bus groove is generally composed of the start bus slot, the straight bus slot (no partition jack and jack), the L-shaped straight (horizontal) curve bus, the Z-type straight (horizontal) offset bus, the T-shaped straight (horizontal) tee bus, the X-type straight (horizontal) cross-way bus, the variable ...
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Types of busbars, conditions for the scope of application - Wiener
1. Commonly used busbars, useful categories
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. According to its material ...
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Dense busbar installation – Wiener
1. Requirements for civil engineering before installation
1) The foundation, structure, reserved holes and embedded parts all meet the design requirements of electrical equipment.
2) After the construction of the roof and floor slab is completed, there shall be no leakage.
3) After the indoor ground construction is completed, mark the ground leveling line on the well wall.
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The connection method of the tubular busbar
In the industry, tubular bus bar can be described as one of the more common equipment, with high mechanical strength, good insulation, wide range of application and other characteristics of many enterprises. So do you know what are the ways to link tubular busbars?
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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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185Power - The solution for the 185mm busbar system
Since the launch of the 185Power system in 2014, Wiener has continued to develop new connection technologies and fuse-type disconnector technologies for the 185Power system on the basis of the 185mm bus technology.
In addition to the application of 1600A below ...
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Busbar differential protection switching operation – Wienal
1. Whether the maintenance scale of the bus differential is confirmed, and whether the maintenance target is unchanged
Generally, differential maintenance includes bus differential maintenance, transformer differential maintenance, generator differential maintenance and line differential maintenance. The basic principle of completing differential maintenance is the same, that is, each side or each ...
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Bus voltage non-system equipment failure and solution - Wienal
In order to ensure the safe and economical operation of the power system and its power generation, supply and electrical equipment, power grid users require the voltage to operate in three ways: forward voltage regulation, reverse voltage regulation and constant voltage regulation. However, when the power grid is in practice, due to the change of active and reactive power output, the increase or decrease of electricity load, and the system wiring party...
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The difference between air-type busway and dense busway - Vernal
1. The insulating medium is different: there is a certain open space between the copper bars of the air bus duct, that is to say, the insulation between the copper bars mainly depends on air, and the insulation medium between the copper bars of the dense bus duct (many people call it a closed bus duct) is an organic insulating material.
2. Copper bar placement ...
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Precautions for terminal block wiring - Wiener
1. The fastening wiring force should be moderate, avoid sliding the bolts and nuts with excessive force, and replace the bolts and nuts that have been slid in time, and prohibit the operation.
2. When tightening or loosening the screws with a screwdriver, it is necessary to force the screws to ...
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Knowledge points of Wiener busway
Busway was born in the United States, first put into practical use in Japan, and then spread all over the mountains and regions in prosperous countries and regions. So what is a busway? Busway is a high-current trunk tappable power supply system, usually made of a metal housing (iron or aluminum).
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Advantages of cable tray installed in busway
At the time of the cable tray installation, the wiring is not very convenient. This phenomenon can be avoided by using busway. The 5 advantages of using busway in the cable tray device are as follows:
1. Convenient connection of bus duct: the so-called plugging ...
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Busbar system reverse operation – Wiener
(1) For the charging of the spare bus, when there is a bus tie circuit breaker, the bus tie circuit breaker should be used to charge the spare bus. At this time, the maintenance device of the bus tie circuit breaker should be fully invested, and the relevant maintenance value and time limit should be changed to a small size, so that when there is a problem with the bus, the bus tie circuit breaker can be quickly tripped, cut off...
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The role of the busbar in the excitation system – Wiener
The bus PT is used to measure the bus voltage on the high-voltage side of the main transformer, and is used to assist in grid connection. Before starting the synchronous grid connection, the excitation system actively adjusts the terminal voltage according to the bus voltage measured by the bus PT, so that the voltage on both sides of the grid-connected switch is basically equal, which is convenient for the same period of grid connection.
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The difference between metal busbar and closed busbar - EVOC
The nature is different
Busbar: It is a common path on which multiple devices are connected in the form of side-by-side branches.
Busway: It is a closed metal equipment composed of copper and aluminum busbars.
Different uses
Mother...
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Calculation method of bus system and distribution cabinet bus - Wiener
The bus system divides the bus into hard bus and soft bus. The 60mm bus system refers to the three-wire or four-wire bus with a distance of 60mm.
1. In the 60mm bus system, the different cross-sectional areas of rectangular copper bars or special-shaped copper busbars such as 2T and 3T can be used to achieve the best classification of current intensity grades.
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Difference Between Busbar and Busway – Vernal
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, mostly use bare wires or stranded wires of rectangular or circular cross-section, which are collectively referred to as busbars.
The role of the bus bar is to collect, distribute and transmit electrical energy. Because the busbar ...
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Wiener bus adapter features:
Functional aspects
The bus bar is made of copper or aluminum, which has high current density, small resistance and small skin effect, and does not need to be used for capacity reduction. The small voltage drop also means that the energy loss is small, which ultimately saves the user's capital. As far as the cable is concerned, because the cable core is a multi-strand thin copper wire, its root surface ...
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Difference Between Busbar and Cable – Vernal
When the busway has not been developed and introduced, the cable is still an indispensable figure in the low-voltage distribution system, when the busway system is introduced and widely used. Whether to choose the cable or the bus duct has become a topic of endless debate. So it's hard to say which of the two is better ...
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Uses and technologies of cable junction boxes – Wienal
XBT series mine flameproof communication cable distribution box has the characteristics of small size, reasonable cable import and export, and wide coverage. Each distribution box has 4-10 inlet and outlet bells, which is suitable for HUYV type mine signal cable in coal containing sexual gas (methane) mixture (non-mining face).
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