1: The overhaul should start from the low voltage side of the transformer. After the power failure of the low-voltage cabinet, clean the dust in the cabinet to check whether the connection between the bus bar and the down conductor is outstanding, whether the connection is heated or discolored, whether the cable head and the terminal pile head are strong and reliable, whether the grounding wire is corroded, and whether the terminal pile head is tightened. All secondary circuit wiring is firmly connected, and the insulation meets the requirements.
2. When checking the drawer-type switch, the drawer-type low-voltage cabinet should be flexible to push in or out, and the mechanical lock should be firm. Check whether the automatic air switch operation organization on the chest of drawers is in place and whether the wiring screws are tightened. Clean the toucher touch exterior and dirt around it, and see if the toucher touch is outstanding. If the toucher is badly touched, file the toucher slightly if necessary. If the toucher is severely ablated (the contacts are worn to 1/3 of the original thickness), the toucher should be replaced. The power supply surface and indicators are in excellent condition.
3: When overhauling the capacitor cabinet, the main switch of the capacitor cabinet should be turned off first, and the capacitor should be discharged to the ground one by one with a wire of more than 10mm2. If the capacitor housing is swollen, it should be dealt with in time to replace the discharge equipment, the connecting screws of the control circuit and the grounding equipment. When turned off, the debug indication section and the auto-compensation section.
4. Maintenance of circuit breakers in low-voltage cabinets and contact cabinets: first disconnect all loads, and then shake out the circuit breakers with handles. Re-tighten the adapter screws to see if the elasticity of the knife edge meets the requirements. Whether there are cracks or damage to the arc extinguishing grid, manually debug whether the mechanical interlock opening and closing is accurate, check whether the touch is outstanding, file the touch surface if necessary, and check whether the internal springs, gaskets and screws are loose, deformed and falling.
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How to solve the fault of the busway
If there is a problem in the bus duct of the double bus wiring, it is necessary to pay attention to the operation mode of bus maintenance in the process of dealing with the problem, and if necessary, the bus maintenance should be stopped for a short time. After the bus voltage disappears, the dispatcher should immediately swing the switch (including the bus tie switch) that may call, and notify the operation team to ...
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Introduction to the Wiener data center bus system
Although the service life cost of the bus system is usually lower than that of the traditional wiring method, the bus system still bears a considerable cost compared with other structural elements of the water supply and drainage or HVAC system.
In addition, customized busbar equipment allows the busbar system to be routed around obstacles ...
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Wiener busbar system PT disconnection treatment
The judgment of PT three-phase voltage loss (symmetrical disconnection) is fundamentally the same for each manufacturer, and it is judged according to the three-phase no voltage and the current of the line. The same is true for PT asymmetrical wire breakage. After analyzing the characteristics of PT wire breaking, the specific judgment of PT asymmetric wire breaking of different manufacturers ...
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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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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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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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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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Detailed explanation of Wiener DC bus
1. Three-phase AC power supply inlet
The power input of each inverter is connected in parallel on the same AC bus, and the power phase of the input end of each inverter is ensured. The circuit breaker QF is the incoming line protection device for each inverter. LR is an incoming reactor, when multiple inverters are operating in the same environment.
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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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Advantages of installing cable trays with busway – Wiener
When it comes to cable tray installation, 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 duct, fireproof bridge is the way it uses plugged in.
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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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Wiener's built-in current transformer
Thanks to the precisely developed housing size, current transformers can now be integrated into all major products in a very space-saving way, such as:
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Performance characteristics of low-voltage busbar system - Wienal
Introduction to the performance of low-voltage bus system:
1. The bus bar is not perforated, and is connected with the cable and copper bar through the connection clip or terminal
2. Switches, contactors and other electrical components can be directly hung on the bus through adapters
3. Save ...
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Vernal fuse replacement method
1. Prepare for replacement. For example, construction personnel should wear labor protection equipment, such as insulating gloves.
2. Confirm the fault type. Check the distribution box with a test pen first, confirm that there is no leakage, and then open the distribution box door. Then use the voltage tester to detect the three-phase power supply, if the three-phase ...
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How to choose the right fuse - Wiener
1. Select the type of fuse according to the line requirements and installation 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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Dense busway with high insulation – Wienal
The dense busway is made of structure, with high mechanical strength, good sealing, fast heat generation, good shielding function and anti-chimney effect.
The conductor is constructed to overcome edge discharge and acute angle damage to the insulation.
Insulation selection extrusion ...
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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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Use and characteristics of AC busbar systems – Wiener
The communication and connection skills of the independent power supply system create better prospects for the power supply of the future. Hundreds of systems around the world have installed SMA's Sunny Island battery inverters to supply power to customers for a long time. The stackability of Sunny Island, i.e. multiple Sunny Islands ...
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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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Precautions for terminal block wiring - Wiener
1. The fastening wiring force should be moderate, avoid sliding the bolts and nuts with excessive force, and replace the bolts and nuts that have been slid in time, and prohibit the operation.
2. When tightening or loosening the screws with a screwdriver, it is necessary to force the screws to ...
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