(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.
(2) Double bus wiring. Dual-bus cabling has the advantages of reliable power supply, convenient protection, active scheduling or easy expansion. However, this kind of wiring uses a lot of equipment (especially zonal switches), and the power distribution devices are messy and uneconomical; Described barrier switch is used as operating electrical appliance in operation, is easy to produce misoperation, is not convenient for completing automation. Especially when something goes wrong with the bus system, it is necessary to dismantle more power supplies and lines in a short period of time, which is not allowed with regard to particularly important large power plants and substations.
(3) Single, double bus or bus segment plus bypass. Its power supply is highly reliable and fast and easy to operate, but its investment has increased and its economy is slightly less economical. Especially when a bypass circuit breaker is used to carry this circuit, the operation is messy, which increases the chance of misoperation. Together, the device of the bypass circuit breaker clutters up the corresponding protection and automation system.
(4) 3/2 and 4/3 wiring. It has a high degree of power supply reliability and operational activity. Any faults or overhauls of the busbar will not cause a power outage; With the exception of a short-term power outage in the two circuits connected to the circuit breaker at the time of the connection failure, any malfunction or maintenance of the other circuit breakers will not interrupt the power supply; Even if two sets of busbars fail together (or when one group undergoes a major overhaul and the other fails), power can still be supplied under pole conditions. However, there are many devices used for this wiring, especially circuit breakers and current transformers that require significant investment, as well as secondary control wiring and relay protection.
(5) Bus-transformer-generator unit wiring. It has the characteristics of simple wiring, less switchgear, cumbersome operation, suitable for expansion, and because there is no generator outlet voltage bus, it is able to reduce the short-circuit current of the generator and the main transformer.
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How to optimize the busbar system of the computer room - Wiener
In today's information society, the computer room is a very common equipment, so the most important thing in a computer room is the bus system, which is the center and skeleton of the power distribution of the entire computer room. Then a reasonable bus system will greatly improve the efficiency of the equipment room. So how do you optimize ...
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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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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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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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Application advantages of industrial busway - Wiener
1. It has a modern beauty;
2. Small dimensions;
3. Strong and light weight, simple operation;
4. The connection is very simple (just like connecting water pipes, connecting sections through tees, elbows and other joints to make them into a system;
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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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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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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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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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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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Wiener bus adapters are suitable for use with Siemens 3VA1 and 3VA2 circuit breakers
For the use of Siemens' new 3VA1 series circuit breakers in the 30Compact system with currents up to 160A, Wiener has developed an EQUES® bus adapter.
A spring-loaded base and high-performance internal power rails ensure safe connection to the circuit breaker.
advantage
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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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Aluminum alloy busway circuit continuity - Wiener
The continuity of the aluminum alloy bus duct maintenance circuit is related to the PE line, and the crossover PE wire conductor bus of the maintenance conductor and the two-unit bus bar should reach 50% of the phase line, the equivalent cross-sectional area. The continuity resistance of the housing and PE line maintenance circuit is ≤ 0.005 ohm female, and the unit with jumper wire is not less than the maintenance conductor.
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Development of the busbar trunk system – Wiener
(1) Air-type busway
Since the mid-50s of the last century, represented by Beijing Baizhifang Airport Electrical Appliance Factory, the conductive row has been supported in the shell with insulating liner and insulated by air medium. The phase-to-phase distance is 50mm.
(2) Secret ...
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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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Considerations for purchasing a busbar system – Wiener
The bus system plays a very important role in the practice of construction, and for products such as the bus system, the relevant items can not be ignored, so that we can better use the practical value of this type of product. Generally speaking, when we are purchasing a bus system ...
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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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Structural characteristics of high-voltage busway - Vernal
If you understand the scope of application of the busway, you can see that the excellent effect of the busway has the upper hand, which has a lot to do with the structural features. Therefore, if you want to have more confidence with the bus duct, you still need to understand it from the structural characteristics. At a time when China's economy is developing rapidly, ...
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The common DC bus of the inverter system - Wiener
1. Three-phase AC power supply inlet
The power input of each inverter is connected in parallel on the same AC bus, and the power supply phase of the input of each inverter is consistent. In Figure 3, the circuit breaker QF is the incoming protection device for each inverter. LR is an incoming reactor, when multiple inverters are in the same ...
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