three phase transformer

Shuogong Power is a leading transformer manufacturer and supplier in China. Our designs and manufactures a wide range of 3 phase isolation transformers and 3 phase autotransformers ranging from a 0.5VA to 500KVA. We also offer a wide range of termination systems including leads, lugs, bus bars, din rail or any combination your special application may require. Welcome to contact us to get the latest three-phase transformer price

three phase transformer

Three phase transformer related products

Three phase transformer model

The following are some common three-phase transformer model specifications, if the transformer you need is not in the list, you can contact us. Shuogong Power can manufacture transformers to meet all your needs, including three-phase autotransformers, three-phase isolation transformers, etc.

Phase 3-Phase Auto transformer
Capacity 1KVA to 500KVA optional
Input Voltage AC 380V
Input Current 1.5A
Output Voltage (Optional) AC 220V, 200V
Output Current 2.6A (220V), 2.8A (200V)
Frequency 50Hz / 60Hz
Winding Material (Optional) Aluminum Wire, Copper Wire
Cooling Method Self-Cooling or Wind-Cooling
Working Efficiency ≥98%
Waveform Distortion No distortion (compared with output wave)
Insulation Resistance ≥ 150MΩ
Wiring Yn0
Electrical Strength Power frequency sinusoidal voltage 3000V lasts for 1 minute, no breakdown and flicker
Overload Protection Can withstand instantaneous 2 times the rated current
Moisture-Proof Type (Optional) Open type, sealed type
Ambient Temperature -20℃ ~ +45℃
Altitude ≤ 2500m
Relative Humidity 0-95%
Noise ≤35dB (within 1 meter)
Design Service Life 20 years
Use Environment No explosion, rain and snow corrosion place, and no gas and conductive dust in the medium that can corrode metal and damage insulation
Weight (Enclosure Included) Please check the spec sheet
Dimension Please check the spec sheet

Specification

Without Case Size(length width height mm)

Weight(kg)

1KVA

183

120

165

11

2KVA

183

130

165

15

3KVA

230

130

195

23

5KVA

230

160

210

30

8KVA

310

170

240

50

10KVA

310

185

240

60

15KVA

310

220

250

72

20KVA

360

280

360

90

25KVA

360

290

350

110

30KVA

360

300

350

125

35KVA

430

260

410

135

40KVA

430

270

420

145

50KVA

430

270

420

175

80KVA

480

330

430

210

100KVA

480

340

460

290

120KVA

480

360

460

330

150KVA

720

330

610

360

200KVA

800

400

730

480

250KVA

830

420

760

520

300KVA

900

450

900

800

400KVA

950

480

980

1200

500KVA

960

500

980

1500

Model Isolation Transformer
Phase 3 phase
Capacity 0.5KVA to 500KVA
Primary Voltage 380V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
Secondary Voltage 200V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V)
Frequency 50Hz / 60 Hz
Winding Material Aluminium/Copper wire (Optional)
Work Efficiency ≥95%
Insulation Resistance ≥50 MΩ
Electrical Strength 3000V AC/1 min
Noise <35-65dB (1 meter)
Insulation Grade H level
Wiring Mode Dyn11
Cooling Mode Dry type air cooling
Overload Capacity Allow more than 1.2 times rated load to work for up to 4 hours
Enclosure Protection Grade IP 24
Certificate CE
Warranty 12 months
Temperature -15℃~+40℃
Humidity ≤90%RH, without condensation
Altitude <1000m, non corrosive gas and conductive dust

Specification

Without Case Size(length width height mm)

Weight(kg)

0.5KVA

183

115

165

12

1KVA

183

130

165

16

2KVA

230

138

195

25

3KVA

230

150

195

36

5KVA

310

280

270

62

8KVA

360

280

350

100

10KVA

360

300

350

115

15KVA

360

320

350

140

20KVA

430

300

410

200

25KVA

430

315

410

220

30KVA

430

330

410

240

35KVA

480

320

460

280

40KVA

480

340

460

320

50KVA

480

380

470

360

80KVA

820

430

780

480

100KVA

850

450

830

570

120KVA

900

450

830

680

150KVA

950

500

900

750

200KVA

960

500

950

1000

250KVA

1000

550

980

1200

300KVA

1050

550

1100

1500

400KVA

1100

600

1200

2200

500KVA

1200

650

1200

2700

Vido

Why Choose Us?

SHUOGONG is the best manufacturer of transformers and voltage regulators in China, you can choose standard transformer products or custom-made transformers and voltage regulators for special voltages.

Best Industry Leaders

A manufacturer of transformers and voltage regulators with 16 years of production experience.

Be your transformer factory

Accept special customization and OEM service.

Professional Certification

Strict quality management, through CE certification.

Three Phase Transformer Buying Guide

content

Three phase transformer is still our common transformer type, usually there are two series of three phase autotransformer and three-phase isolation transformer. If you want to buy a three-phase transformer then this guide is for you.

1. What is a three phase transformer?

As known, a single phase transformer is a device that is capable of transferring electrical energy from one circuit to one or more circuits based on the concept of mutual induction. It comprises two coils – a primary and a secondary coil, which helps to transform the energy. The primary coil is connected to a single phase supply, while the secondary is connected to a load.

Similarly, a three-phase transformer consists of three primary coils and three secondary coils and is represented as 3-phase or 3ɸ. A three-phase system can be constructed using three individual identical single-phase transformers, and such a 3 phase transformer is known as the bank of three transformers. On the other hand, the three-phase transformer can be built on a single core. The windings of a transformer can be connected in either delta or wye configurations. The working of the 3-phase system is similar to a single-phase transformer, and they are normally employed in power generation plants.

2. Types of three-phase transformer

Three-phase transformers are divided into three-phase autotransformers, three-phase isolation transformers, three-phase rectifier transformers, Scott transformers, three-phase high-frequency transformers, three-phase power transformers, etc.

3. What is a three-phase auto transformer

A normal transformer will have two windings which are physically separated but magnetically coupled together with the help of a magnetic core. As they are separately been isolated, they are called as primary winding which receives the voltage from the source and secondary winding which transfers to the output load.

But the transformer in which there will be only one winding which is common to both primary and secondary is called Autotransformer. The term Auto here refers to that the voltage input variations will be automatically can be improved or can be reduced utilizing the single winding.

4. What is a three-phase isolation transformer?

The principle of three-phase isolation transformer basically adopts the principle of electromagnetic induction. It is safe to use a three-phase isolation transformer, which is generally used as a maintenance power supply. The isolation transformer is commonly 1:1 transformer, but it has different specifications. Three-phase isolation transformers are used for changing voltage, lighting, power supply and rectifying power supply, widely applied to industrial and mining enterprises, power plants, airports, high-rise buildings, subways and other places with high fire safety requirements.

5. How a three phase transformer works

The primary winding of the three phase transformer is energized from a three phase supply. Then, the flux is produced in the core by the primary currents in the three windings. The core has three limbs, where any two limbs act as return path for the flux in the third limb. The flux produced by the primary windings induces emf in the secondary windings depending on the transformation ratio of the 3-phase transformer.

In case of a three phase transformer, the transformation ratio is defined as the ratio of the secondary phase voltage to the primary phase voltage and is denoted by K.

How a three-phase transformer works

three Phase Isolation Transformer Schematic Diagram

three Phase Isolation Transformer Schematic Diagram

6. What is the purpose of a three-phase transformer?

Three-phase transformers are used to step up or step down high voltages at various stages of the transmission system.

Three-phase transformers are commonly used to power homes, businesses, and industrial sites. Larger domestic sites, most commercial sites, and industries have many 3-phase motors that require 3-phase power. Three-phase motors are more efficient than single-phase motors, so they can be used anywhere a larger motor is required.

The use of three-phase transformers in machines is also very common.

7. How to connect a three-phase transformer

A three-phase transformer consists of three transformers, which are either separate or combined with a single core. The primary and secondary of the transformer can be independently connected in star or delta. There are four possible ways of connecting a three-phase transformer bank.

  • Δ – Δ (Delta – Delta) connection
  • Υ – Υ (star-star) connection
  • Δ – Υ (Delta – Star) connection
  • Υ – Δ (Star – Delta ) connection

The choice of connection for a three-phase transformer depends on various factors, such as the availability of neutral connection for earth protection or load connection, insulation and voltage stress to earth, availability of third harmonic flow paths, etc.

Delta-Delta (Δ-Δ) Connection

8. Advantages of three-phase transformers

  • Inexpensive: Three-phase transformers are cheaper compared to single-phase transformers. Compared with three single-phase transformers, it is less expensive.
  • Lightweight: Three-phase transformers are lighter in weight and smaller than single-phase transformers, which means they take up less space.
  • Assemble in the shortest time: very easy to assemble. We can get single-phase power from a three-phase transformer, but not vice versa.
  • Higher Efficiency: Three-phase transformers perform their functions more efficiently and provide more power than single-phase transformers.
  • Easier installation: The pre-wired three-phase transformer is ready to install, making installation very easy and smooth.
  • Easy to transport: In order to provide the same output, the material used to make the core of one three-phase transformer is very less than that of three single-phase transformers. Therefore, they are not only easy to transport, but also less expensive to transport.

9. Disadvantages of three-phase transformers

  • Standby equipment costs more: The individual cost of redundant equipment is high and it is difficult to repair or correct any problems. In a three-phase transformer, all three units share a common core. Therefore, if the unit fails or is damaged, the entire three-phase transformer must be shut down.
  • Repair Costs: Three-phase transformers are expensive to repair because of the high cost of replacing each component. Therefore, in terms of service restoration, backup unit costs are higher compared to single-phase transformers.
  • Reduced capacity: Since the three-phase transformer is self-cooling, the power of the transformer is also reduced at the same time.
  • Fault Correction: If any phase of a three-phase transformer fails, the fault is transferred to the other two phases. Therefore, the entire unit needs to be replaced.

10. Three-phase transformer main components

There are three basic parts of a transformer:

  • an iron core which serves as a magnetic conductor,
  • a primary winding or coil of wire and
    a secondary
  • winding or coil of wire.

11. How to buy a three-phase transformer that fits me?

First of all, please determine the following requirements of your transformer, and only after determining your own needs can you choose a transformer that suits you. If you don’t have the transformer you need, you can also contact the transformer manufacturer for customization. SHUOGONG can provide such a service.

  • Load Voltage
  • Load Current/Ampere
  • Line Voltage

How to buy a three-phase transformer that fits me

12. How do transformer manufacturers and suppliers choose?

We all know that there are many transformer manufacturers and suppliers in the world, so how should we choose?

First of all, you should consider the technical level of transformer manufacturers, whether they have strong research and development capabilities, and whether they can meet your needs, especially for some special voltages.

Secondly, you should consider the cost of your transformer, including the price of the transformer, the shipping cost of the transformer, etc.

In addition, you should also consider the after-sales service of the transformer. Although the probability of transformer problems is relatively low, we still have to take this problem into account. How about the after-sales capabilities of transformer manufacturers and suppliers? Can they provide services such as returns and exchanges. These are very important.

13. What is the price of a three-phase transformer?

The price of three-phase transformers is relatively wide. First of all, if you want to buy a three-phase transformer, you must first select the type of transformer, power and input and output voltage.

In this way, a correct transformer quotation can be obtained.

Below I have listed the market prices of some commonly used three-phase transformers. for reference only.

This price does not represent the price of SHUOGONG transformers, if you have a demand for our transformer prices, you can contact us for a quotation.

Items Price  Primary Voltage Secondary Voltage
4 kVA Three Phase Isolation Transformer $624.21 400/230V 208/120V
5 kVA Three Phase Isolation Transformer $692.77 480V/240V 400/230V
6 kVA Three Phase Isolation Transformer $804.96 480V/240V 380/220V
7 kVA Three Phase Isolation Transformer $1107.54 380/220V 208/120V
8 kVA Three Phase Isolation Transformer $1163.08 480V 240V
10 kVA Three Phase Isolation Transformer $1678.46 480V 240V
15 kVA Three Phase Isolation Transformer $2290.00 480V 208V
20 kVA Three Phase Isolation Transformer $2640.00 480V 120V
25 kVA Three Phase Isolation Transformer $2947.62 380V 220V

14. Which three-phase transformers can SHUOGONG supply?

SHUOGONG has rich manufacturing experience in the field of transformers, we can supply all types of three-phase transformers, whether you need three-phase isolation transformers or three-phase autotransformers, we can provide the best products.

Our transformers support all input and output voltages, if you do not find the voltage or power you need in the parameter table, please contact us. We can customize any transformer product that meets your needs.

14. How to order SHUOGONG three-phase transformer?

SHUOGONG can meet all your transformer needs, we support customized voltage and power, we also support OEM.

You can get a quote for your transformer by contacting us via the contact form or email.

Our transformer experts will provide you with the most professional technical solutions and quotations for transformers.

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