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400KVA dry type power transformer

Author: Shandong Guangda Transformer Manufacturing Co., Ltd. Release time: 2019-12-26 53143 browse

   400KVA dry type power transformer is a kind of transformer for urban disaster prevention and energy saving. Its high-voltage coil is wound by copper wire and is cast by epoxy resin in vacuum. The inner and outer layer of the coil is additionally provided with glass grid to increase mechanical strength, heat resistance and electrical strength. The low voltage coil is wound by copper wire or copper foil. The inner and outer layers of the low voltage coil are also reinforced with glass screen grids to increase mechanical strength and to be cast by epoxy resin in vacuum. It can be equipped with forced cold air device with automatic temperature control to reduce temperature rise, prolong the service life of the product and increase the output capacity of the transformer. It can also provide various protective covers at the request of customers to improve the product safety protection level.

The 400KVA dry type power transformer has the characteristics of low loss, low noise, low PD, fire resistance, shockproof, dustproof, moisture resistance, safety and reliability, beautiful appearance and so on. Because there is no leakage oil problem, no environmental pollution and simple maintenance, it can penetrate into the load center, thus reducing the power supply radius, reducing the line loss and saving power. Therefore, it is widely used in urban network transformation, especially for high-rise buildings, airports, wharves, industrial and mining enterprises, petrochemical plants, commercial centers, power stations, etc. Explosion and moistureproof important places.

Product characteristics

The product has the characteristics of low loss, low noise, low position, hard combustion, fire prevention, shockproof, dustproof, moisture resistance, safety and reliability, beautiful appearance and so on. Because there is no leakage oil problem, no environmental pollution and simple maintenance, it can penetrate into the load center, thus reducing the power supply radius, reducing the line loss and saving power. Therefore, it is widely used in urban network transformation, especially for high-rise buildings, airports, wharves, industrial and mining enterprises, petrochemical plants, commercial centers, power stations, etc. Explosion and moistureproof important places.

Conditions of use

1. the ambient temperature is not higher than 40 C, and the altitude is no more than 1000m. If the ambient temperature is above 40 C or above 1000m,

Appropriate adjustment should be made according to the relevant provisions of GB6450.

2. shell protection level has IP20, IP23 and so on.

The protection degree of enclosure is IP20, IP23.

3. there are two ways of cooling: air self cooling (AN) and forced air cooling. Transformers for air self cooling (AN) and forced air cooling (AF).

It is necessary to ensure that the installation environment of the transformer has good ventilation capacity. When the transformer is installed in the basement or other poor ventilation environment,

Ventilation and ventilation should be set up according to 1kW loss (PO+PK), and 4m3/min air volume should be selected.

Product structure overview and main technical principles

400KVA dry type power transformer is a device for static transmission of alternating current energy and changing of AC voltage based on electromagnetic induction principle. In a closed core made of laminated silicon steel sheets, two mutually insulated windings are formed. Dry type transformer



Eight. Product installation

1. before installation, we should read the instructions, product nameplates and product outline dimensions carefully, understand product weight, installation methods and so on, and prepare corresponding lifting.

Equipment and tools.

2. when the product is installed, it usually leaves the wall and other obstacles 500mm, and there should be 500mm distance between the adjacent transformers.

3. the minimum safe distance between the live conductor and the ground of the transformer should be in line with the third part of the GB1094.3-2003 power transformer: insulation level, external insulation test.

Air gap regulations.

4. minimum safety reference distance of the surface of the high voltage coil to the ground.

High voltage 3kV 6kV 10kV 15kV 20kV 35kV

Net spacing (mm) 6090125180225340

5. under normal circumstances, the transformer can be placed directly in the use site, installation and inspection can be put into operation. For earthquake protection and other special requirements, the foundation of the transformer should be embedded with bolts. The position of the bolt should be referenced to the transformer's dimension diagram, so that it corresponds to the installation hole of the transformer. When installing, the small wheel of the transformer is removed, and the transformer is fixed through buried bolts.

6. transformers equipped with rollers, the direction of the rollers can be converted to 90 degrees.

7. when installing a transformer with a housing, do not apply gravity to the shell to avoid distortion.



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