In the common DC bus system of multiple inverters, especially the common DC bus of inverters of different power levels, it is very important that the connection between the bus bars is maintained by fuses. When the power equipment of one inverter in the common bus is damaged by short circuit breakdown, the energy of the other inverter bus bars is discharged through the damaged inverter, which may exceed the fault current treatment ability of a single inverter, resulting in a safety accident.
The separation of the series fuse on the positive and negative bus can be useful to prevent further expansion of the fault and ensure the safety of the common bus. The rated voltage of the fuse should be more than 700VDC, and the rated current of the fuse is confirmed according to the rated output current of the connected inverter, and the rated current of the fuse is generally more than 2 times the rated output current of the inverter.
For the common DC bus system of multiple inverters, especially the common DC bus of inverters of different power levels, it is very important that the connection between the bus bars is controlled by the contactor. When a certain inverter needs to be cut into the common bus system, in order not to affect the normal operation of other inverters of the common DC bus, it is necessary to consider the control sequence of the inverter bus connection, and select the appropriate time to connect the inverter to the common DC bus system.
When a frequency converter in the common DC bus system is replaced, overhauled or damaged due to demand, it is necessary to consider how to disconnect a single frequency converter from the common bus system in order not to affect the normal operation of other frequency converters in the common DC bus system.
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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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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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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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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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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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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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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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Types of corrosion of Wiener tubular busbars
Tubular bus is a new type of equipment that is widely used in our current days, and it itself has the characteristics of high current, outstanding insulation and wide range of application, so we don't seem to be too worried about its function and role when using it. But there is one thing that needs to be ...
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Analysis of the conditions for the use of sealed busbars - Wienal
Ambient air temperature: turn off the busbar system to benchmark the ambient air temperature; Unless otherwise ruled, the manufacturer should give an additional current to shut down the busbar system at a base ambient air temperature of 35°C; If applicable, the manufacturer should give an additional coefficient k: (K1=1 at 35°C) in order to determine the size of the package.
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Wiener Data Center Bus System
Although the service life cost of the busbar system is usually lower than that of the traditional wiring method, the busbar system still bears a considerable cost compared to other structural elements of the water supply and drainage or HVAC system.
In addition, customized busbars ...
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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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Power system bus wiring method - Vernal
(1) Single busbar. Single busbar, single bus segment, single bus plus bypass, and single bus segment plus bypass.
(2) Double busbar. Double-busbar, double-busbar segmentation, dual-busbar plus bypass, and dual-busbar segmentation plus bypass.
(3)3/2 wiring ...
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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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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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Wiener bus load forecasting method
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 of a relatively small power supply area supplied by the main transformer of the substation, 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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Busway Installation Specification – Wiener
1: The basic requirements for the bus duct:
1) Conductor data: high-purity electrical copper drawn from national standard T2 electrolytic copper, with a purity of more than 99.9% and a full-length tinned copper conductor. 2) Shell: Select high-quality aluminum-magnesium alloy profiles that meet the strength, with heat dissipation ribs, and the appearance should be oxygen-proof.
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A detailed description of the Wiener comb busbar and connection terminals
The Wiener comb busbars and connection terminals are available with QUADRON®CrossLinkBreaker in size 000/00
Recommended installation: Wire entry at the lower end of the NH-fuse disconnector through the comb busbar.
In the mounting position ...
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What are the characteristics of the bus wiring method of the power system?
(1) Single bus wiring. Single bus wiring has the advantages of simplicity and clarity, less equipment, less investment, and convenient operation and expansion, but its reliability and activity are poor. When the bus or bus separator is faulty or overhauled, all power to the bus must be disconnected.
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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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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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