1. The main bus at the upper end of the low-voltage distribution cabinet is calculated according to the material and cross-section in the extension meter. The bus bar connected to the main bus at the upper end of the switch is not accounted for and is included in the low-voltage distribution cabinet.
2. The transformer mainly depends on how large the load is, according to your switchgear can calculate the matching transformer, but not necessarily your load matching transformer, according to the switchgear accounting capacity 380 * 600 * 1.732 = 394896W, that is to say, you can choose a transformer below 400KVA, transformer to the switchgear connection line to use more than 200 square cables. The output voltage of the transformer must be 380V, the general output voltage can reach more than 400 volts a little higher, this high-voltage cabinet can withstand the voltage of the output side of the transformer is 115% of the additional voltage, that is, 15% of the additional voltage at the height, of which 5% is the voltage drop of the transformer's own copper consumption and iron consumption after the load, and 5% of the voltage drop of the load side load itself.
3. The line should be accounted for separately:
The copper busbar between the cabinets is connected (the need for the rear device), the copper busbar should be accounted for separately, and the copper busbar in the cabinet is not connected, and the accounting shall not be repeated.
The wire cabinet bus is connected, how to supply power to the low-voltage cabinet if the transformer is not connected.
meters to calculate the engineering quantity, the bus of high and low voltage substation and distribution is according to the width of each equipment to calculate the engineering quantity of the bus, so there is no need to leave a reservation, and there is no way to leave a reservation.
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The advantages of busway are used in cable tray installations
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 plug-in bus...
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Wiener bearing repair technology
1. Comprehensive correction of bearings
The comprehensive correction of the bearing includes the comprehensive and strict correction process of the damaged bearing after cleaning, dismantling, inspection, roller table grinding or replacement of inner and outer rings, new rolling element manufacturing/original rolling element grinding, rolling element replacement, assembly, clearance adjustment and inspection and packaging.
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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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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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Fuse selection method - Wiener busbar
1. Select the model of the fuse according to the circuit requirements and device 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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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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Technical features of Wiener closed busbar
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 and close them in their respective shells, and the shells themselves are electrically connected, ...
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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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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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The advantage of busway over cable in modern construction - Wiener
The power supply trunk of modern buildings plays a very important role like the aorta of the human body, and if something goes wrong, it can cause serious consequences. In the 80s of the 20th century, many stable cables were used in modern buildings. With the rapid development of the city, the power load of the building ...
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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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Venal common bus scheme applicable places and precautions
When multiple inverters are used in the common DC bus, because the DC bus between the inverters is connected together, the bus energy between the inverter in the power generation operation state and the inverter in the electric operation state can flow to each other, so that the voltage of the common bus remains relatively stable, and the body ...
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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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Ferromagnetic resonance occurs in the busbar system – Vernal
The ferromagnetic resonance of the bus system is divided into parallel ferromagnetic resonance and series ferromagnetic resonance. Parallel ferromagnetic resonance refers to the resonance of the ground capacitance of the bus system and the nonlinear inductance of the bus electromagnetic voltage transformer (primary neutral grounding) in the neutral point ungrounded system or small current grounding system.
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Difference Between Fuse and Circuit Breaker – Vernal
The principle of the fuse is to use the current to flow through the conductor to heat the conductor, and the conductor is ablated after reaching the melting point of the conductor, so the electrical appliances and circuits used for circuit maintenance are not burned out. It is an accumulation of heat, so it is also able to complete overload maintenance. Once...
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Characteristics of single bus wiring in the switchgear - Wiener
In power distribution equipment such as voltage distribution cabinets and switchgear at all levels of power plants and substations, the conductors connected between large electrical equipment such as generators and transformers and various electrical equipment are called busbars. Busbars, also known as busbars, are used to gather, distribute, and transmit electrical energy. The connection methods of the bus bar are ...
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Low-voltage cabinet for capacitance compensation – Wienal
Capacitor compensation is indispensable in low-voltage cabinets, so what is the effect of capacitor compensation. The meaning of this is that it acts as a capacitor. Let's take a look at the principle of capacitor compensation first, when the capacitor is compensated, the capacitor and the load are connected in parallel, and the capacitor is like a bin. When the load increases, the power supply has internal resistance, so that ...
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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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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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The essence of Wiener busbar technology
1. Closed busbar hooking technology
Circuit breakers and contactors can be hooked on the bus through the bus adapter, and fuse switches and other products are directly attached to the bus, so the bus bar plays a two-layer effect of conductive and fixed rotation.
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