1) Single bus wiring. Single bus wiring has the advantages of simple and clear, less equipment, small investment, convenient operation and conducive to expansion, but the reliability and flexibility are poor. When there is a fault or maintenance of the bus bar or bus barrier switch, the full power supply of the bus must be disconnected.
(2) Double bus wiring. Dual-bus wiring has the advantages of reliable power supply, convenient maintenance, flexible scheduling or easy expansion. However, there are many equipment (especially barrier switches) used in this kind of wiring, and the power distribution device is messy, and the economy is poor; As an operating electrical appliance in operation, the barrier switch is prone to misoperation and is inconvenient for completing automation; Especially when the bus system is faulty, it is necessary to cut off more power sources and lines in a short time, which is not allowed for particularly important large-scale power plants and substations.
(3) Single and double bus or bus segmentation plus bypass. Its power supply reliability is high, and its operation is flexible and convenient, but the investment has increased, and the economy is slightly poor. In particular, when the circuit is carried with a bypass circuit breaker, the operation is messy, which increases the opportunity for misoperation. Together, because of the installation of bypass circuit breakers, the corresponding maintenance and automation system is messy.
(4) 3/2 and 4/3 wiring. It has high power supply reliability and operational flexibility. Any bus fault or maintenance will not cause power failure; Except for the short-term power failure of the two circuits connected to the contact circuit breaker when it fails, any other circuit breaker failure or maintenance will not interrupt the power supply; Even in extreme cases where two sets of busbars have a problem together (or another group of faults during one group of maintenance), the power can still be continuously delivered. However, there are many equipment used in this wiring, especially circuit breakers and current transformers, which have a large investment, and the secondary control wiring and relay maintenance are relatively messy.
(5) Bus, transformer, and generator unit wiring. It has the characteristics of simple wiring, less switchgear, easy operation, suitable for expansion, and because there is no generator outlet voltage bus, the short-circuit current on the low-voltage side of the generator and the main transformer is reduced.
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Low-voltage dense busway uses and applications
Densely insulated bus duct (hereinafter referred to as bus duct) can be communication three-phase three-wire, three-phase four-wire, three-phase five-wire system, frequency 50-60Hz, voltage to 400V, rated operating current of 250-5000A, mainly as a new type of power supply and distribution equipment in industrial and mining, enterprises and high-rise buildings. Mother with insertion day ...
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Introduction to busbars, busway, and busbridges - Wiener
generatrix
In the field of electricity, the busbar can also be called the busbar, busbar, etc., which mostly refers to the busbar or power supply trunk in the high and low voltage cabinet, which is used to connect multiple electrical lines. The system will install various interface cards through the bus, and transmit various data to the devices connected to the interface cards.
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Features of busway power supply system - Wiener
1. Trunk power distribution system, simple wiring and reliable operation.
2. It is convenient to tap, and you can tap without cutting off the main power supply. Large power supply capacity up to 6300A current-carrying capacity.
3. High dielectric strength, strong overload, superior fire performance. Good heat dissipation performance, low impedance ...
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The main components of the Wiener bus system in the distribution cabinet are composed
The Wiener bus system is divided into 40mm, 60mm, 100mm and 185mm systems according to the upper and lower spacing between the copper bars, and the ship unloader distribution cabinet mainly adopts a 60mm rectangular bus system. This is shown in the figure below. The 60mm system provides maximum operating space and maximum current with its smallest external size.
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How is the Wiener bus system generally debugged in sections?
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, most of which use bare wires or stranded wires with rectangular or circular sections. The role of the bus bar is to collect, distribute and transmit electrical energy. According to the structure, the bus bar is divided into hard busbar, soft ...
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Features of Wiener busway
The Wiener busway mainly acts on the aluminum conductor, which has a large current capacity and good electrical and mechanical properties. In addition, it uses 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, the equipment occupies a significantly smaller area and has a beautiful appearance.
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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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Cooling method for dense busway – Wiener
If the temperature of the dense busway is too high, a fault will occur. For the sake of insurance, it is necessary to know the heat dissipation method of the densely packed busway to prevent the impact of excessive temperature on the busway.
Low-voltage transmission line conductors, wires, cables, branch dense busway, exposed conductive poles, punctured ...
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Busway ultimate temperature rise value - Wiener
The ultimate temperature value-added of the busway is directly related to the current-carrying capacity of the conductor and the potential safety hazards, so it is necessary to mark the limiting temperature value-added of the busway, which is the most critical safety technical parameter of the busway.
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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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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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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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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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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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Distribution cabinet bus connection method - Wiener
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 internal and external electrical appliances of the distribution cabinet.
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Operating regulations for the use of busbars - Wiener
1. Charging to the bus should be carried out with a switch (bus tie, bypass or line switch) with snap-action maintenance that reflects various types of faults. Before charging the bus, it should be considered whether the system may be unstable if the charging bus trips, and if necessary, the active power flow of the relevant line can be reduced. ...
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Busbar System Vibration and Noise – Vernal
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 multi-faceted discussion on the low-voltage bus system, and after many years of production, the bus body ...
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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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Difference Between Grounding Electrode and Grounding Busbar – Vernal
The grounding electrode is a discharge channel that connects current or voltage to the earth, and in order to reduce the grounding resistance, the electrodes that form the grounding grid are generally used in groups.
The grounding bus refers to the connecting wire that connects the current or voltage to the grounding grid, or the conductor that connects the grounding electrode into one.
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What are the modules of the Wiener bus system?
The modulus of the bus system is 40mm, 60ram, 100/185mm; The bus cross-section is rectangular, double "T" (i.e., "H" shape) and three "T" (i.e., 'state') shapes; The bus system can be three-wire, four-wire or five-wire, or even seven-wire, of course, it should be determined according to the needs ...
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