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Shenzhen Luohu professional transformer maintenance service

Shenzhen Luohu professional transformer maintenance service - welcome to consult

source network release time: 14:08:02

Shenzhen Luohu professional transformer maintenance service - welcome to consult

advantages of prefabricated foundation compared with the traditional box transformer foundation construction method, prefabricated foundation has the following advantages. Environmental benefits. The prefabricated structure can greatly reduce the wet operation on site, improve the environment of the construction site, and reduce environmental pollution and construction disturbance. Moreover, a large amount of wood will be consumed in the construction of cast-in-place concrete for temporary support, scaffold formwork, etc. Prefabrication technology can effectively save wood, which is conducive to the protection of forests and wildlife time efficiency. Since the fabrication of prefabricated components is mostly completed in the factory (except for on-site prefabrication), only connection and installation are required on site, so the construction period is greatly shortened. Shenzhen transformer installation Shenzhen transformer maintenance transformer capacity increase and reduction project - Shenzhen transformer maintenance

transformers are often seen in our life. Using transformers to stabilize voltage can help us use electricity safely and protect the safety of electrical appliances at home. In fact, there are many types and specifications of transformers. Different specifications of transformers have different meanings. Our common transformer, such as dry-type transformer, is scb10-1000kva/10kV/0.4kV. The meaning of dry-type transformer is that s represents this kind of transformer as a three-phase transformer. If s is replaced by D, it means that this transformer is a single-phase transformer. And C means that the transformer winding is a resin cast solid, that is, a dry-type transformer. B refers to foil winding. If B is replaced by R, it refers to wound winding. If l, it refers to aluminum winding. If Z, it refers to on load voltage regulation. If it is copper, it is not marked. 10 indicates the design serial number, also known as the technical serial number. 1000KVA refers to the rated capacity of this transformer (1000 kVA). 10kV means primary rated voltage, and 0.4kV means secondary rated voltage. Next, Shenzhen Yingtong power will introduce transformer maintenance, precautions for transformer operation, abnormal phenomena of transformer and their causes

how to choose the reactor for frequency converter

how to choose the reactor for frequency converter? Next, the selection of rated AC current, voltage drop, inductance, inductance of corresponding rated current and cable length are analyzed

1 . Selection of rated AC current

rated AC current is the long-term working current of the reactor designed from the aspect of heating, and sufficient high-order harmonic components should be considered at the same time. That is, the actual current flowing through the output reactor is the output current of the inverter motor load

2. Voltage drop

voltage drop refers to the actual voltage drop at both ends of the reactor coil corresponding to the actual rated current at 50Hz. Usually, the voltage drop is about 4v~8v

3. Selection of inductance

rated inductance of reactor is also an important parameter! If the inductance is not properly selected, it will directly affect the change of voltage drop under the rated current, resulting in faults. The size of the inductance depends on the cross-sectional area of the reactor core and the adjustment of the number of turns of the coil and the air gap should be closely inspected during extrusion. The inductance of the output reactor is determined according to the cable length within the rated frequency range, and then the cross-sectional area of the iron core and wire under the corresponding inductance requirements are selected according to the actual rated current of the motor, so as to determine the actual voltage drop

4. Corresponding to the inductance of rated current and cable length:

cable length rated output current inductance

300 meters 100A 46 h

200A 23 h

as long as there is one control method of speed 250A 16 h

300A 13 h

600 meters 100A 92 h

200A 46 h

250A 34 h

300A 27 h

the ideal reactor should remain unchanged with the rated AC current and below.Increase, The inductance decreases gradually

when the rated current is greater than 2 times, the inductance is reduced to 0.6 times of the rated inductance

when the rated current is greater than 2.5 times, the inductance is reduced to 0.5 times of the rated inductance

when the rated current is greater than 4 times, the inductance is reduced to 0.35 times of the rated inductance

transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformer and special transformer (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, mining transformer, audio transformer, medium frequency transformer, high frequency transformer, impulse transformer, instrument transformer, electronic transformer, electric plastic extruder, and the market capacity will be further expanded, such as reactants and mutual inductors). Shenzhen Yingtong Power Co., Ltd.: transformer maintenance, transformer maintenance, power equipment emergency repair Shenzhen Luohu professional maintenance transformer Service - welcome to consult

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