Three Phase Oil Immersed Transformer

Three phase oil immersed transformer

What is an oil immersed transformer?

The oil immersed transformer adopts three-dimensional wound iron core. Because its three iron core pillars are arranged in equilateral triangle three-dimensional, the winding is tight, the three magnetic circuits have the same length, and the magnetic circuit has no air gap. Shortest, core leg cross-sectional area closer to circular, further improving performance, reducing losses, reducing noise, balancing three terms, and reducing third harmonic components. But due to the pressure regulating switch being inside the water tank. When adjusting the pressure, the contacts of the switch cannot be seen from outside. There are two types of reaction phenomena: poor contact and open circuit. If the contact is not good, it is easy to burn out the switch when the load is too large.

Oil immersed transformers are important equipment in the power system, mainly used to change voltage and transmit electrical energy. Oil immersed transformers mainly operate based on the principle of electromagnetic induction. Suitable for power grid transformation in urban and rural areas, industrial and mining enterprises, and more suitable for combination transformers and pre installed substation transformers.

1. Power: According to customer's requirements

2. Voltage level: According to customer's requirements

3. Voltage regulation type: Open circuit or conduction

4. Tapping range: ±2x2.5% (can be made according to buyer requirements)

5. Frequency: 50Hz or 60Hz

6. Phases: Three

7. Connection symbol: Dyn11

8. Short circuit impedance: standard impedance

9. The height does not exceed 1000m, and the ambient temperature does not exceed 40OC. If these conditions cannot be met, we will adjust the parameters according to the standards.

Material:

Oxygen-free copper wire with lower resistivity will become smoother and free of burrs after a series of additional surface treatments. Therefore, our transformer has lower load loss and better electrical performance.

High-quality silicon steel sheet with low unit loss and low no-load transformer.

The high-quality wooden laminated insulation will not split or move even under the influence of a short circuit.

Thoroughly filtered transformer oil contains less water, gas and impurities, which makes our transformers work better.

The high-quality rubber sealing material can prevent the transformer form from aging or leakage.

Traduction pour : Transfo H61 20KV 160kVA B2

H61 Transformer 15(20)kV 160kVA B2

Three-phase MV / LV distribution transformer with MV and LV windings in wound copper power P = 160KVA

- Compliance: NFC 52 100 - 52 112 and 52 113 standard or equivalent in substance

- Natural cooling: ONAN

- MV voltage adjustment: by switch off +/- 5% in five (5) positions

- Type: on post H61

- Nominal power: 160KVA

- Primary rated voltage: 20,000V ± 5%

- Secondary voltage: 410V off-load between phases / 240V between phase and neutral

- Frequency: 50Hz

- Short-circuit voltage: 4%

- No-load loss less than or equal to 300W

- Load loss less than or equal to 2000W

- Coupling: Dyn11 with output neutral

- MV and LV crossings: in porcelain

Operating temperature of oil immersed transformer

When the oil immersed transformer is working, it is necessary to ensure that the working temperature will not cause the transformer oil to deteriorate too quickly, thus increasing the operating cost. When the operating temperature of the oil immersed transformer reaches 85 degrees Celsius, an alarm will be triggered. When the maximum temperature reaches 95 degrees Celsius, the switch of the transformer will be turned off.

Therefore, it is stipulated that the oil temperature at the upper working temperature of oil immersed transformers cannot exceed 85 ℃. The rated capacity of a transformer refers to the maximum power allowed for long-term continuous operation when the transformer can achieve economically reasonable efficiency and normal expected service life under the specified environmental temperature. The specified environmental temperature for transformers is a maximum temperature of 40 ℃, a maximum daily average temperature of 30 ℃, a maximum annual average temperature of 20 ℃, a minimum temperature of -25 ℃ for outdoor transformers, and -5 ° C for indoor transformers.

According to operating experience and specialized research, when the insulation temperature of the transformer winding is within the range of 80-140 ℃, the insulation life loss doubles and the service life decreases by half for every 6 ℃ increase. This is the 6 ° C rule for transformer operation. The maximum allowable temperature for long-term operation of transformer windings is the normal service life temperature, and the maximum allowable value for winding hot spot temperature is the safe temperature.

In order to achieve the most economical service life of insulation materials, they are divided into different heat resistance levels such as Y, A, E, B, F, H, C, etc. based on their maximum allowable working temperature. Normal situation. The maximum allowable working temperature for Class Y insulation is 90 ℃, Class A is 105 ℃, Class E is 120 ℃, Class B is 130 ℃, Class F is 155 ℃, Class H is 180 ℃, and Class C is above 180 ℃

Outline Diagram

PRODUCT PHOTO

FACTORY WORKSHOP

COMPANY OVERVIEW

EXHIBITION

FAQ

1. Are you a manufacturer or a trader?

Fengyuan Power is a leading professional manufacturer located in Henan, China

2. How about your delivery and after-sales service?

Delivery is based on the order quantity, usually we need 1 month for container orders. 20 containers (20 feet or 40 feet) per month are no problem for us. We can answer user questions and solve their problems 24 hours a day, and provide comprehensive technical support for all our products in a timely manner.

3. What is your product warranty?

First of all, our switchgear and power equipment have CCC, ISO9001...etc. quality certification, and its electrical parts and accessories have CE, Rohs, CB, TUV, Kema... Secondly, we provide 1 year quality guarantee.

4. Do you accept OEM and ODM?

Yes. Our R&D team has the latest technology and can develop and produce products according to customers' drawings and brands

This product is usually customized.

We are a manufacturer and have a professional technical department that can design and provide solutions according to customer needs.

Please contact our sales personnel to obtain design drawings

Here are our customer examples for your reference

Togo customer

IF NEED MORE DETAILES,PLEASE FEEL FREE TO CONTACT US

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