Oil Immersed 15kv 20kv 33kv 690v 160kva 250kva Transformer

Oil Immersed 15kv 20kv 33kv 690v 160kva 250kva Transformer

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

PRODUCT PHOTO

1. Standards

IEC 60076 Power Transformers

IEC 62271-200 AC metal-enclosed switchgear and controlgear for rated voltage above 1 kV and up to and including 52 kV

IEC 62271-202 High-voltage/low-voltage prefabricated substation

2. Cooling Code and Insulation Liquid

For Oil Immersed Transformers
ONAN: Oil Natural Air Natural
ONAF: Oil Natural Air ForcedThe ONAN transformers can be operated with normal rating and ONAF with an increased rating of approximately 25%.

3. Altitude

The transformers are suitable for operation at altitudes of up to 1000m above sea level. Site altitudes above 1000m require the use of special designs and should be mentioned in the order.4. ApplicationsThe distribution transformer provides the final voltage transformation in the electric power distribution system, stepping down the networks medium voltage to low voltage, the level used by the consumer, and is considered
one of the most important links in the distribution network.

4.1 Building Infrastructure and Industrial

Airports, hospitals, factories, shopping malls, hotels, commercial and residential towers.

4.2 Utility

Generation, transmission, distribution substations, water and waste water treatment plants.

4.3 Oil and Gas

Oil and gas plants, petrochemical plants and refineries.

5. Service

To complement its position as a market leader of transformer manufacturing and supply, ZHONGYI provides testing and
commissioning services.

Our highly qualified and competent commissioning engineers undertake the complete electrical testing and
commissioning of transformers and ancillary equipment.
ONE YEAR WARRANTY

6. Testing

We believes that quality means absolute congruity and compliance with customer’s requirements and
international standards.
Therefore, ZHONGYI has equipped its testing lab with the most modern testing equipment and instrumentation devices
to ensure conformity to the highest level of quality and safety, where every transformer produced by alfanar is tested
according to IEC standards.6.1 Routine Tests
1- Measurement of winding resistance
2- Measurement of voltage ratio and phase displacement
3- Measurement of short circuit impedance and load losses
4- Measurement of no-load losses and current
5- Dielectric routine tests
6.2 Type Tests
1- Temperature rise test according to IEC 60076-2
2- Lighting impulse test according to IEC 60076-3

Our Factory:

COMPANY OVERVIEW

EXHIBITION

PACKING&DELIVERY

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FAQ:

Q1. Can I have a sample order?

A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.

Q2. What about the lead time?

A:Sample needs 3-5 days, mass production time needs 1-2 weeks.

Q3. Do you have any MOQ limit for order?

A: Low MOQ, 1pc for sample checking is available

Q4. How do you ship the goods and how long does it take to arrive?

A: We usually ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive. Airline and sea shipping also optional.

Q5. How to proceed an order?

A: Firstly let us know your requirements or application.

Secondly We quote according to your requirements or our suggestions.

Thirdly customer confirms the samples and places deposit for formal order.

Fourthly We arrange the production.

Q6. Is it OK to print my logo on product?

A: Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Q7: How to deal with the faulty?

A: Firstly, Our products are produced in strict quality control system and the defective rate will be less than 0.2%.

Secondly, during the guarantee period, we will send new one with new order for small quantity. For defective batch products, we will repair them and resend them to you or we can discuss the solution including re-call according to real situation.

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

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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