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S11-400kva oil immersed transformer

Date of issue: 2020/9/22 10:28:11 Source: http://perryswenson.com Click: zero

  S11-400kva oil immersed transformer is composed of oriented high magnetic conductivity silicon steel sheets. The core is core core core and full inclined seam stacked iron core. Its iron core column is multi-stage circular cross-section to ensure low noise and low loss. High and low-voltage cable junction boxes are welded on both sides of the box wall for cable wiring. The high-voltage coil must have a tap voltage of ± 5% of the rated voltage When the tap changer changes the voltage and voltage, the power supply must be cut off first, and then the wind and rain pairs of the tap changer on the box wall shall be removed for voltage transformation. The low voltage side of the transformer is allowed to be connected to 693v or the "d" type is connected to 400V power supply. The secondary end is directly installed in the cable junction box, and six porcelain sleeves are led out for the user to change the connection. The lifting of the transformer is carried out by using the hanging plate welded on the box wall The towing sled is provided with mounting holes on the sled, which can be used for ore supply and can be equipped with tramcar rollers when necessary.

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 S11-400kva oil immersed transformer

Application range of s11-400kva oil immersed transformer

It is suitable for oil immersed mining power transformer with capacity of 1250kva and below and voltage of 10kV and below. This type of mine transformer is a general oil immersed transformer, which has no explosion-proof requirements. It is mainly used as the power supply of mine lighting or electric drive in mine power distribution. After transportation, all transformers of this series can be assembled with relevant disassembled parts for acceptance test without checking the lifting center.

Standard for s11-400kva oil immersed transformer

Standards for s11-400kva oil immersed transformer:

  GB1094.1~2-1996、GB1094.3,5-2003 、GB/T6451-2008、GB12173-2008 。

Operating environment and working conditions of s11-400kva oil immersed transformer

1. The altitude shall not exceed 1000m above sea level, otherwise specified in special environment;

2. Ambient temperature:

High temperature + 40 ℃;

Average daily high temperature + 25 ℃;

High annual average temperature + 20 ℃;

Outdoor low temperature - 20 ℃.

3. The relative humidity of the surrounding air is not more than 95%, "when + 25 ℃";

4. It is installed under the mine where there is coal dust and gas, but there is no explosion risk;

5. The waveform of power supply voltage is approximately sine wave;

Selection principle of s11-400kva oil immersed transformer:

The selection of capacity of s11-400kva oil immersed transformer is a comprehensive and comprehensive technical problem. There is no simple formula to express it. The selection of transformer capacity is related to load type and characteristics, load rate, demand rate, power factor, active and reactive power loss of transformer, electricity price (including basic price), infrastructure investment (including transformer price, installation and civil engineering cost and power supply subsidy), service life, transformer depreciation, maintenance cost and future plan.

The basic capacity estimation of s11-400kva oil immersed transformer mainly includes the following aspects:

1. Use the calculation load method to estimate

Firstly, the total calculated load to be supplied by the transformer is calculated, and then estimated according to the following formula.

The total capacity of transformer = total calculated load + considering the future capacity increase margin.

2. Use economic operation effect method to estimate

The economic load of the selected transformer is equal to or close to the actual service load, that is, the transformer capacity is approximately equal to S / beta m, where s is the actual service load, kVA;

Beta m -- load rate of the selected transformer with high efficiency.

The body (winding and iron core) of s11-400kva oil immersed transformer is installed in the oil tank filled with transformer oil, and the oil tank is welded with steel plate. The oil tank of medium and small-sized transformers is composed of a tank shell and a cover. The transformer body is placed in the tank shell, and the tank body can be lifted out for maintenance by opening the tank cover. S11-400kva oil immersed transformer adopts imported silicon steel sheet to ensure the performance and quality of iron core. High quality red copper electromagnetic wire and electrical grade insulating wood are used. The low-voltage winding with the capacity of 630 ~ 2000kVA is of tubular or spiral structure, with balanced ampere turn distribution, strong short-circuit resistance, no deformation, no burst and high mechanical strength.


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