The bus equipment has the characteristics of beautiful appearance, compact structure, agile installation, easy to use, economical and time-saving, safe and reliable, and is one of the important parts of the low-voltage power supply system. Many scholars have conducted a multifaceted study on the low-voltage bus system, and after many years of production, the reliability of the bus system and the performance of electrical appliances have invented good economic benefits.
Although the bus equipment has invented good economic benefits, the noise generated during operation is very huge, especially when the load increases, and this problem has not been well solved. According to the analysis of industry standards, the occurrence mechanism, energy origin and transmission process of such noise have not been found, so as long as the oscillating acoustic characteristics of the bus system are studied from the foundation, the cause of noise can be understood and contained.
The finite element method is used to analyze the oscillation characteristics of the bus bridge, the node displacement is taken as the gap condition, and the radiated sound field of the system is calculated by the gap method, so that the oscillation status of each part of the bus system and the noise dispersion law are obtained, and then reasonable methods are taken to reduce the noise of the bus system.
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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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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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Classification of the use of busway in different places - Vernal
(1) General bus duct
Non-flame retardant and non-fire-resistant bus duct selected for general load power distribution. In the event of a short circuit, it will be incinerated until it is connected to other busbars, which can easily cause fire accidents.
(2) Flame retardant bus duct
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How to solve the fault of the busway
If there is a problem in the bus duct of the double bus wiring, it is necessary to pay attention to the operation mode of bus maintenance in the process of dealing with the problem, and if necessary, the bus maintenance should be stopped for a short time. After the bus voltage disappears, the dispatcher should immediately swing the switch (including the bus tie switch) that may call, and notify the operation team to ...
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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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Strip Switch vs. Disconnector Circuit Breaker Comparison – Wiener
Bar switches are different from regular switches. They are critical to ensuring effectiveness. For example, when the current exceeds a certain amount of time, they cause heat to be generated, allowing the fuse to switch the fuse to further assist in breaking the circuit. Therefore, as a kind of current protection device, they can achieve ...
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The Wiener bus system is reliable
The bus 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. The role of the busbar is to gather, distribute and transmit electrical energy.
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What is the difference between a Wiener busbar and a cable
The difference between busbar and cable
The busbar is used to gather current. Many power and power supply circuits are connected to the bus, through which the power is gathered and sent to each circuit. Therefore, the current carrying capacity of the bus bar is relatively large, and the current carrying capacity of the bus ...
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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. Confirm the fault type. Check the distribution box with a test pen first, confirm that there is no leakage, and then open the distribution box door. Then use the voltage tester to detect the three-phase power supply, if the three-phase ...
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What is tubular busbar and dense busbar - Wiener
What is a tubular busbar
Tubular bus bar is a kind of bus bar product with copper tube or aluminum alloy tube as conductor and external insulation. The tubular bus has the characteristics of high current (12000A), high mechanical strength, good insulation, wide application range, etc., ...
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Low-voltage cabinets need temperature and humidity controllers for the reason - Vernal
Why is the temperature and humidity controller of the low-voltage cabinet? The application field of low-voltage cabinet is very wide, high-voltage switchgear should be one of the key electrical equipment and equipment for electromagnetic energy production scheduling and transportation, there will be some simple reasons to form high-voltage switchgear hot in specific work, low-voltage cabinet I remind you that at this time ...
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Standard parameters of busway specification - Wiener
1. The standard scale of the bus duct
This specification regulates the terminology, skill requirements and test methods of the insulated bus trunk system (bus duct) and its plug-in feed box (hereinafter referred to as the feed box).
This specification specification applies to additional voltage AC to 660V...
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The content and steps of low-voltage cabinet maintenance - Wiener
1: The overhaul should start from the low voltage side of the transformer. After the power failure of the low-voltage cabinet, clean the dust in the cabinet to check whether the connection between the bus bar and the down conductor is outstanding, whether the connection is heated or discolored, whether the cable head and the terminal pile head are strong and reliable, whether the grounding wire is corroded, and whether the terminal pile head is tightened. Everything secondary ...
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Advantages of common DC bus - Wiener
1. Energy saving: The energy fed back when the motor brakes can be used, so it is more energy-saving, especially for oilfield kowtow machines, cranes and other lifting equipment.
2. The power element of the equipment is high: because the motor can feed back energy, the reactive power loss is small, so the power of the equipment ...
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How to choose the right fuse - Wiener
1. Select the type of fuse according to the line requirements and installation conditions. Circuits with small capacity are semi-enclosed or enclosed without fillers; The selection of large short-circuit current has a packing closed type; Semiconductor component maintenance selection of quick fuses.
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Wiener busbar system PT disconnection treatment
The judgment of PT three-phase voltage loss (symmetrical disconnection) is fundamentally the same for each manufacturer, and it is judged according to the three-phase no voltage and the current of the line. The same is true for PT asymmetrical wire breakage. After analyzing the characteristics of PT wire breaking, the specific judgment of PT asymmetric wire breaking of different manufacturers ...
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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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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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Analysis of the product characteristics of Wiener busway
Since the busway is made of copper bars or aluminum as conductors, it has a large current capacity and good electrical and mechanical properties. In addition, it is made of a metal trough as the shell, so it is non-flammable, safe and reliable, and has a long service life. Compared with traditional power distribution or ...
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Wiener bus load forecasting method
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 of a relatively small power supply area supplied by the main transformer of the substation, 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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