Bevezetés
A three phase transformer is one of the most widely used electrical transformers in industrial power distribution systems. It is designed to transfer electrical energy between three-phase power circuits while changing voltage levels efficiently and safely.
Three phase transformers are commonly used in:
- Ipari gyárak
- Kereskedelmi épületek
- Közmű-alállomások
- Napenergia-erőművek
- Szélenergia-projektek
- Mining facilities
- Adatközpontok
- Manufacturing plants
Compared with single phase transformers, a three phase transformer provides higher power capacity, improved efficiency, and better load balance, making it the preferred solution for medium voltage and high-power electrical systems.
As an experienced three phase transformer manufacturer, EverNew Transformer provides customized transformer solutions from 15 kVA-tól 500 MVA-igtöbbek között:
- Three phase dry type transformers
- Three phase oil immersed transformers
- Elosztó transzformátorok
- Teljesítménytranszformátorok
- Padra szerelt transzformátorok
What Is a Three Phase Transformer?
A three phase transformer is an electrical transformer designed for three-phase alternating current (AC) systems.
Unlike a single phase transformer, which operates with one alternating voltage waveform, a three-phase transformer uses three separate phases with a 120-degree phase difference.
The three phases provide:
- Higher power transmission efficiency
- Reduced conductor size
- Better motor performance
- More stable industrial power supply
A typical three phase transformer contains:
- Three primary windings
- Three secondary windings
- Mágneses mag
- Szigetelőrendszer
- Hűtőrendszer
- Transformer enclosure
How Does a Three Phase Transformer Work?
The operating principle of a three phase transformer is based on electromagnetic induction.
When AC voltage is applied to the primary winding, it creates alternating magnetic flux inside the transformer core. This magnetic flux induces voltage in the secondary winding.
The voltage conversion ratio depends on the relationship between winding turns:
Voltage Ratio = Primary Turns / Secondary Turns
Például:
Lépés lefelé transzformátor
Input:
13.8kV
Output:
480V
The transformer reduces medium voltage electricity to a usable low voltage level for industrial equipment.
Three Phase Transformer Types
Three phase transformers can be classified according to construction, insulation method, cooling system, and application.
1. Three Phase Dry Type Transformer
A three phase dry type transformer uses air as the cooling and insulation medium instead of transformer oil.
Dry type transformers are widely used where fire safety and environmental protection are important.
Advantages of Dry Type Transformer
Magas szintű tűzbiztonság
No oil leakage risk
Alacsony karbantartási igény
Beltéri felszerelésre alkalmas
Környezetbarát
Common Applications
Three phase dry type transformers are commonly installed in:
Kereskedelmi épületek
Kórházak
Repülőterek
Adatközpontok
Ipari létesítmények
Bevásárlóközpontok
Typical ratings:
| Kapacitás | Alkalmazás |
|---|---|
| 15 kVA | Small commercial loads |
| 45 kVA | Industrial equipment |
| 75 kVA | Building power supply |
| 500 kVA | Factory distribution |
| 2500 kVA | Large industrial systems |
EverNew manufactures dry type transformers with:
- Copper winding
- Aluminum winding
- Cast resin insulation
- UL/CSA compliant designs
2. Three Phase Oil Immersed Transformer
A three phase oil immersed transformer uses insulating oil for cooling and electrical insulation.
Oil immersed transformers are commonly used for outdoor power distribution because they provide excellent heat dissipation and high capacity capability.
Előnyök
- High power capacity
- Kiváló hűtési teljesítmény
- Hosszú élettartam
- Suitable for outdoor applications
Alkalmazások
A leggyakoribb alkalmazási területek a következők:
- Közmű-alállomások
- Napenergia-farmok
- Szélerőművek
- Ipari üzemek
- Power transmission systems
Typical voltage ratings:
- 6kV
- 10kV
- 11kV
- 13.8kV
- 35kV
- 110kV
- 220kV
3. Three Phase Distribution Transformer
A three phase distribution transformer is designed to reduce medium voltage electricity to low voltage for end users.
Typical conversion:
11kV → 400V
13.8kV → 480V
35kV → 400V
Alkalmazások:
- Lakóterületek
- Commercial facilities
- Ipari gyárak
4. Three Phase Power Transformer
A háromfázisú tápfeszültség-transzformátor is used in high voltage transmission and substations.
Alkalmazások:
- Erőművek
- Grid substations
- Megújuló energiával kapcsolatos projektek
Teljesítménytartomány:
From several MVA to hundreds of MVA.
Three Phase Transformer Applications
Ipari energiarendszerek
Factories rely on three phase transformers to supply power for:
- Motorok
- Compressors
- Pumps
- CNC-gépek
- Gyártósorok
- Automation equipment
Industrial transformers usually require:
- Magas hatékonyság
- Folyamatos működés
- Strong overload capability
Kereskedelmi épületek
Three phase transformers are commonly used in:
- Irodaházak
- Szállodák
- Bevásárlóközpontok
- Repülőterek
A common North American system:
480V → 208Y/120V
This voltage system is widely used for:
- Lighting
- Légkondicionáló rendszerek
- Building equipment
Megújuló energia projektek
Solar and wind projects require transformers to increase voltage before grid connection.
Példa:
Solar inverter:
800V
↓
Transformer:
0.8kV / 35kV
↓
Grid connection
Three Phase Transformer Voltage Ratings
Different countries use different voltage standards.
Észak-Amerika
Common voltages:
| Elsődleges feszültség | Másodlagos feszültség |
|---|---|
| 480V | 208Y/120V |
| 600V | 347/600V |
| 13.8kV | 480V |
| 34.5kV | 480V |
International Markets
Common systems:
| Primary | Secondary |
|---|---|
| 10kV | 400V |
| 11kV | 415V |
| 20kV | 400V |
| 35kV | 400V |
EverNew transformers can be designed according to:
- IEC
- ANSI
- IEEE
- UL
- CSA
- CE
- GOST
How To Select A Three Phase Transformer?
A megfelelő transzformátor kiválasztásához több műszaki paramétert is figyelembe kell venni.
1. Transformer Capacity (kVA)
The transformer capacity must match the electrical load.
Common sizes:
- 15 kVA
- 30 kVA
- 45 kVA
- 75 kVA
- 112,5 kVA
- 150 kVA
- 500 kVA
- 1000 kVA
- 2500 kVA
2. Bemeneti és kimeneti feszültség
Példa:
Commercial building:
Input:
480V Three Phase
Output:
208Y/120V Three Phase
3. Frequency
Common frequencies:
- 50Hz
- 60Hz
4. Transformer Cooling Method
Choose according to installation environment:
Indoor:
Száraz típusú transzformátor
Outdoor:
Olajba merített transzformátor
5. Transformer Standards
A nemzetközi projektek esetében előfordulhat, hogy a következőkre van szükség:
- UL certification
- CSA certification
- DOE efficiency
- IEC szabványok
- IEEE-szabványok
Three Phase Transformer Manufacturer
Selecting a reliable three phase transformer manufacturer is important for ensuring safety, efficiency, and long service life.
A professional transformer supplier should provide:
✔ Engineering design support
✔ Factory testing
✔ International certifications
✔ Customized voltage solutions
✔ Export experience
Miért érdemes az EverNew Transformer-t választani?
EverNew Transformer is a professional transformer manufacturer in China with more than 30 years of experience.
Our manufacturing capabilities include:
Product Range
- Elosztó transzformátor
- Száraz típusú transzformátor
- Olajba merített transzformátor
- Pad szerelt transzformátor
- Teljesítménytranszformátor
Technical Capability
Kapacitás:
15 kVA – 500 MVA
Feszültség:
6kV – 500kV
Tanúsítványok
- UL
- CSA
- CE
- GOST
- ISO
We supply transformers for:
- USA
- Kanada
- Dél-Amerika
- Európa
- Ázsia
- Afrika
Three Phase Transformer FAQ
What is the difference between single phase and three phase transformer?
A single phase transformer is normally used for smaller loads, while a three phase transformer is designed for industrial and commercial power systems requiring higher capacity.
What is the most common three phase transformer voltage?
Common systems include:
- 480V
- 208Y/120V
- 400V
- 415V
- 13.8kV
- 35kV
How much does a three phase transformer cost?
The price depends on:
- Transformer capacity
- Voltage rating
- Réz- vagy alumíniumtekercs
- Hűtési módszer
- Required standards
- Order quantity
How do I choose a three phase transformer size?
You should consider:
- Total connected load
- Starting current
- Future expansion
- Feszültségi követelmények
- Efficiency requirements
Következtetés
A three phase transformer is an essential component in modern electrical power systems, providing efficient voltage conversion for industrial, commercial, and renewable energy applications.
Choosing the correct transformer requires careful evaluation of:
- Power capacity
- Voltage levels
- Hűtési módszer
- Telepítési környezet
- Nemzetközi szabványok
Szakemberként three phase transformer manufacturer, EverNew Transformer provides reliable transformer solutions worldwide with customized designs from low voltage distribution systems to high voltage power networks.
Contact EverNew Transformer today for your three phase transformer project.
