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. When you have no choice but to charge the bus with a gate knife, it is also necessary to check and confirm that the bus insulation is normal.
2. When charging the 220kV and 110kV bus with the transformer, it is necessary to ground the neutral point of the transformer.
3. When charging the bus, care should be taken to prevent the occurrence of ferromagnetic resonance or overvoltage caused by the unbalanced capacitance of the three opposite sides of the bus.
4. When carrying out the inverted bus operation, you should pay attention to:
(1) The bus tie switch should be changed to non-automatic.
(2) The maintenance of the bus shall not be stopped and shall be adjusted accordingly.
(3) The rationality of the power supply and load distribution on each group of buses.
(4) Whether the primary junction line corresponds to the secondary load of the pressure transformer.
(5) Whether the primary junction line corresponds to the maintenance of the secondary AC and DC circuit.
(6) A group of buses should be deactivated in the double bus, and after the bus is reversed, the secondary switch of the pressure transformer on the vacated bus should be opened first, and then the bus tie switch should be opened. (Except for those required by on-site regulations, it is necessary to go through the filing procedures with the provincial dispatch in writing in advance.) ）
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Laminated busbar system – Wiener
In the power system, the bus connects the various current-carrying branch circuits in the power distribution device together, and plays the role of collecting, distributing and transmitting electric energy; According to the appearance and structure, the bus bar is roughly divided into three categories: hard busbar, soft busbar and closed busbar.
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The advantage of intelligent energy-saving dense busway - Wiener
Intelligent, energy-saving, dense busway, it is capable of generating outward electromagnetic wave radiation. It can be said that the line loss in the process of power transmission is greatly reduced, which can save energy and reduce electromagnetic radiation pollution. In addition, the product is also specially equipped with a radiator, which increases the heat dissipation area of the conductive bar and accelerates the ...
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There are several main ways to wiring the Wiener bus
Bus line refers to a product made of copper (copper bar) and aluminum material with high conductivity to transmit electrical energy and have the ability to collect and distribute electricity. The main conductor used by the power station or substation to transmit electrical energy. Through it, the output of the generator, transformer or rectifier ...
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Wiener is a common way to wiring busbars
Single bus wiring method: all outgoing wires are connected to the same busbar, which is also the most cost-effective and simplest wiring method
Single bus segmentation: The outgoing line is arranged in two parts on different sections of the single busbar, so that a power failure in the meantime does not affect the power supply of the other bus
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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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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 moment, 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 smaller one, so as to facilitate the bus tie circuit breaker when there is a problem, the bus tie circuit breaker can quickly trip, cut ...
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Closed busway essentials – Wiener
Before the closed busway device, it should be ensured that the electrical shaft, the transformer and distribution room, the decoration project of the place through which the busway passes, and the heating and ventilation project are all completed to ensure that the closed busway is not polluted. The reserved holes and embedded parts of the floor and wall should be embedded and reserved according to the position required by the design.
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The Hazards of Arc Light – Wiener Busbar System
The arc of the switchgear cable spacing causes the pressure and temperature in the switchgear to increase rapidly, and if not removed in time, it will cause serious harm in the following aspects:
(1) The arc temperature is 2 times the appropriate solar temperature, and the large ...
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What are the hazards of 220V DC in the bus system - Wiener
The grounding of the DC system should include two situations: the one-point grounding of the DC system and the two-point grounding of the DC system.
In the DC system, the positive and negative poles of DC are insulated from the ground, and there is no grounding current when generating a ground current when one pole is grounded.
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Low-voltage enclosed busway function - Wiener
Phase-off bus is a kind of high-current transmission equipment widely used in the outgoing circuit of generators of 50MW and above and the branch circuit of the factory
The phase-off busbar, conductor and shell are made of aluminum plate coil and welding, with the following characteristics: ...
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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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The importance of busbar systems in low-voltage switchgear
One of the characteristics of low-voltage switchgear is the multi-functional busbar system.
The bus bar is a conductor that connects large electrical equipment such as generators and transformers with various electrical equipment. The role of the bus is to, sub-...
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How to choose the right busway products - Wiener
1. Selection of qualified products of regular enterprises:
The busway must be a product with the 3C necessary certification mark and style test report. China's busway factories are uneven, and most of the production methods are handicraft, mainly in well-off areas. When purchasing, it is necessary to thoroughly investigate the production of the factory ...
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Connector box features of the busbar system – Wiener
1. Rapid device
Today, busway adapters cannot be flipped at the time of installation, and the two busway sections are not out of phase when flipped when connected.
2. High protection level
The coupling box has a protective function, ...
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Busbar system segmentation understanding - Wiener
The so-called "section" of the bus bar is that the data that constitutes the bus are directly connected, and there is no circuit breaker or blocking switch in the center. A circuit breaker or barrier switch in the center is called a "segment".
Different voltage levels cannot be connected in the same section. No...
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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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Wiener bus differential protection switching operation
1. Whether the scale of bus differential maintenance is determined, and whether the maintenance goal is unchanged
Generally, differential maintenance includes bus differential maintenance, transformer differential maintenance, generator differential maintenance and line differential maintenance. The basic principle of achieving differential maintenance is common, i.e. on all sides or on each side...
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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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Example of the application of the Wiener busbar system
The motor control cabinet uses the Wiener bus system, and the copper bus is used as both a hooking element and a conductive element; The incoming molded case circuit breaker is connected to the copper bar through a special bus adapter, and all the motor maintenance switches and contactors are hooked on the bus adapter in an orderly manner.
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Wiener Electric's busbar system escorts the operation of textile machinery equipment
According to Wiener electrical engineer, the bus system is a process-assisted component, the main effect is to hook the switch on the adapter, and the adapter is then hooked on the copper bar, so that the full protection of the copper bar can be completed, and the safety factor is improved; The upper port of the switch can be connected without ...
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