The out-of-phase shut-off bus adopts a fully connected structure, with optimized design, reasonable design, stable and reliable operation. Choose either natural cooling or forced air cooling.
The out-of-phase closing bus is to support the conductors of each phase bus with insulators respectively and close them in their respective shells, and the shells themselves are electrically connected, and the three-phase shells are shorted with short-circuit boards at the beginning and end to form a three-phase shell circuit.
Compared with the open bus used in the past, the out-of-phase closed bus is closed in the grounded metal shell, which basically eliminates the interphase short circuit, thus improving the safety and reliability of the bus operation.
Because of the shielding effect of the shell circulation and eddy current, the out-of-phase shut-off bus greatly reduces the electric power and the electrical energy loss of the nearby steel components during the short circuit.
Advantages of common box busbar:
There are three conductor methods for common box busbars: bare conductors, outer insulated conductors and cables.
The common box closure bus has a compact structure, convenient installation, and the protection level is IP54, which can basically eliminate the grounding problems caused by external moisture, dust and foreign objects.
The closing bus and its supporting equipment are supplied by the manufacturer in complete sets, and the on-site installation is convenient.
The current-carrying bus is closed inside the shell, which is basically not affected by dust and moisture, and the protection workload is less.
Gas-insulated transmission line (GIL) advantages:
Large transportation capacity and low loss; Compact structure, modular components, small space occupation, sensitive laying mode; It can effectively shield electromagnetic disturbance, has little impact on the environment, and has high reliability and safety; It can transmit voltage levels up to 1100kV.
Advantages of Cast Bus (CRB):
CRB is small in size, with insulation resistance up to 10GΩ and protection level up to IP67.
CRB selects better production technology, formula, imported raw materials and equipment, and develops a new two-pole integrated DC excitation structure, which also improves the on-site inter-segment connection process, abandons the old-fashioned complex process of demoulding and uses a simple, fast and non-demoulding process, which improves the quality of inter-segment connection.
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Introduction of busbar, busway and busway bridge - Vernal
generatrix
In the field of electricity, the busbar can also be called the busbar, busbar, etc., most of which refer 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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The role of plug-in busway – Wiener
Generally speaking, plug-in busway is mainly used for power transmission. We know that all conductors will have losses, and the losses caused by the flow of electricity through conductors are larger and some are smaller. For example, compared with the aluminum wire with the same wire diameter and the copper wire, the loss of aluminum is larger, and the loss of copper is smaller. That is, the conductivity ...
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The application of Wiener bus system wiring technology in box transformer
The bus system is to directly connect the components to the bus, the bus does not need to be perforated, at this time, the bus is not only the conductor of the component, but also the support of the component, the current can reach 2500A, so that the box transformer function has the following progress:
1 ...
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Wiener looks at the busway drawing method
First, in the CAD system drawing, it is a plan of the bus duct, and two parallel polylines can indicate the bus duct.
2. The busway includes the following parts:
1. Feeder busbar, which is used to transmit electricity
2. Plug-in busbar with plug-in interface above, ...
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Bus load forecasting method and characteristics - Wiener
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 supplied by the main transformer of the substation to a relatively small power supply area, 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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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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Scope of application of busbar - Wiener busbar system
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. ...
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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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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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Busway installation waterproofing work - Vernal
Most of the bus duct is the design standard for indoor use, so even if the humidity in the indoor air is relatively high, it will not have much impact on the operation of the busbar, but the bus duct enters the water during the use of the busway, which will definitely cause a certain degree of impact.
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The busway phase in the low-voltage incoming line - Wiener
According to the requirements of the relevant specifications, the placement method 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 wire.
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Precautions for the operation of low-voltage cabinets - Wienal
1. To carry out work in all and part of the energized panels, the equipment should be overhauled and separated from the operating machinery and equipment with obvious markings.
2. The secondary winding of the voltage transformer and the transformer should have reliable grounding maintenance.
3. On the secondary circuit of the voltage transformer in operation...
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Application of busway – Wiener
The busway system is an efficient power distribution device, especially suitable for the needs of high-rise buildings and large-scale factories for reasonable wiring. With the presentation of modern engineering equipment and equipment, the electricity consumption of all walks of life has increased rapidly, especially many high-rise buildings and large factories. Traditional cables serve as ...
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Scenarios for the use of various types of busbars - Vernal
1. The bus bar is divided into hard bus bar and soft bus bar.
2. According to different shapes, hard busbars can be divided into: rectangular busbars, tubular busbars, trough busbars, diamond busbars, etc.
3. Rectangular busbar is a commonly used busbar. According to its material ...
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Advantages of pluggable busway
1. The plug-in bus duct has strong overload capacity
The overload capacity of the bus duct is strong, depending on the high working temperature of the insulation material it uses, and the working temperature of 105 is selected for the insulation data used in the bus duct, and the radiation cross-linked flame retardant winding tape with a working temperature of more than 140 °C has been developed.
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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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Advantages and disadvantages of bus full differential protection
Thorough differential maintenance of the bus is to connect the current transformer of all the connecting elements on the bus to the differential circuit according to the same name phase and polarity, the characteristics and transformation ratio of the current transformer should be the same, if the transformation ratio can not be together, the compensation converter can be used to compensate, satisfactory ΣI=0.
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220V DC Hazard in Busbar System – Wiener
The grounding of the DC system should include two conditions: 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 they do not cause any harm when generating a ground current because there is no path to constitute a grounding current, but the ground of one pole is long.
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Corrosion type of tubular busbar - Wiener
1. Crevice corrosion
When there is a gap between the surface of the tubular bus itself and other things, the corrosion in the gap will be accelerated due to the difference in the effect of the inflatable battery, but there is no effect on the outside of the gap. However, crevice corrosion has little to do with the type of alloy, because even very corrosion-resistant ...
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