10kv Oil Immersed Transformer

10kv Oil Immersed Transformer

The oil immersed transformer is most commonly used as electrical equipment for power transmission in power plants, power grid transmission and distribution stations, and industrial and commercial substations.

1、 What is an oil immersed transformer?

Oil immersed transformer, also known as oil immersed transformer, is a transformer device that uses oil cooling to reduce the temperature of the transformer. Unlike dry transformers, the main body of an oil immersed transformer is installed in a welded steel oil tank filled with insulating oil. When an oil immersed transformer is in operation, the heat from the coil and iron core is first converted into insulating oil and then into cooling medium. According to the capacity, it can be divided into immersed Free cooling transformer and immersed forced air cooling transformer.

2、 The structure and working principle of oil immersed transformers

Oil immersed transformers are structurally similar to transformers It is one of the types of transformers classified according to the insulation form of the iron core. Therefore, it has recognizable features of oil immersed coils, which can reduce the heat map of the equipment inside.

The basic components of the oil immersed type are composed of magnetic cores, windings, and bushings. The magnetic core provides a path for magnetic flux. The winding creates a magnetic field consisting of a conductor coil wound around an iron core and insulated with a cardboard barrier and shielding layer. The thickness of the winding insulation layer increases with increasing voltage. The bushing connects the transformer winding to the substation.

Oil type transformers are used for power distribution or substations. Their core and coils are immersed in oil, which can cool and insulate. Oil circulates through the pipes in the coil and around the coil and iron core components through convection. The oil is cooled externally by the fuel tank at low rated values, and by an air-cooled radiator at high rated values.

3、 Types of oil immersed transformers

There are two main types of oil immersed transformers: single-phase transformer and three-phase transformer.

A. One phase oil immersed transformer

B. Three-phase oil immersed transformer

4、 Purpose of using oil immersed transformers

Oil type transformers can be installed on the ground, base, or pole for outdoor use. They provide efficient performance in various applications, including transmission and distribution networks, renewable energy generation, and small industries.

The oil transformer has a huge capacity, so it will save a lot of electricity, minimize energy loss, save energy, and reduce user costs. Not only that, the oil in the machine can also cool the internal wire cores, thereby improving the durability and electrical performance of transformer equipment.

5、 Precautions for using oil-immersed transformers

1. Oil immersed transformers use oil for operation, so the quality of the oil will significantly affect the lifespan and safety of the transformer.

2. During use, it is necessary to regularly inspect and maintain the transformer system to ensure the normal and safe operation of the machine. Otherwise, there is a high risk of problems and extreme danger.

3. The waste generated by petroleum is prone to polluting the environment and affecting the lives of surrounding people. Therefore, the gradual disposal of waste is also important

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

1. Rated voltage: 6.3kV, 10kV, 11kV, 15kV, 20kV, 22kV, 33kV, 35kV, etc.

2. Rated power capacity: 10kVA-2500KVA, etc.

3. Two windings or three windings

4. On-load or no-load voltage tap changer

5. Frequency: 50HZ /60HZ

6. Vector group: Dyn11, Yyn0, Ynd11 or others

7. Cooling: ONAN/ONAF/OFAF

Structural characteristics of oil immersed transformer:

1.Iron core:

The iron core is made of high-permeability ferromagnetic grain-oriented cold-rolled silicon steel sheet.

2. Winding:

The winding adopts corrugated winding around the oil passage, no paint dipping process, and tightening tape binding. The windings are all concentric coils. The high-voltage winding has a tap corresponding to the tap voltage requirement and leads to the tap switch. The switch is installed on the box cover, and the tap voltage can be changed only after the power supply is cut off.

3 Full protection device:

10~2000kVA transformers are equipped with pressure relief valves.

According to user requirements, a gas relay with alarm and trip terminals can be installed.

4. Oil temperature measuring device:

The transformer is equipped with a tube socket of a glass thermometer. The tube socket is set on the top of the oil tank and extends into the oil by 120±10mm;

Transformer mounted outdoor signal thermometer;

5. Transformer oil tank:

The transformer oil tank is composed of corrugated walls, and the surface is sprayed with dust and the paint film is firm. The corrugated heat sink not only has a cooling function, but also has a "breathing" function. The elasticity of the corrugated heat sink can compensate for the change in transformer oil volume caused by temperature rise and fall. Therefore, the fully sealed transformer has no oil conservator, which reduces the overall height of the transformer;

When the transformer is packaged, a vacuum oil injection process is used to completely remove the moisture in the transformer. The oil of the transformer does not come into contact with the air, which effectively prevents oxygen and moisture from invading the transformer, which may lead to the deterioration of the transformer insulation performance and the aging of the transformer oil. Therefore, it is not necessary to conduct oil sample tests on a regular basis.

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FAQ

Q5 : Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.

Q7 : Can the price be negotiated?

A: Yes, the price is negotiable. It can be changed according to your quantity or package

Q8 : How about inspection?

A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.

Q9 : What is payment terms?

A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.

Q10 : What is the service offered by company?

A: We have the professional engineer team which can design and develop the mold to arrive different customer requirement.

We also have the sales team to offer good service from pre-sale to after-sale.

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

Russian clients

Data Sheet N° 1-A: Transformer H61 20kV/400V of 100kVA

IF NEED MORE DETAILES,PLEASE FEEL FREE YO CONTACT US

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