Введение
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:
- Промышленные заводы
- Коммерческие здания
- Коммунальные подстанции
- Солнечные электростанции
- Проекты в области ветроэнергетики
- Mining facilities
- Центры обработки данных
- 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 От 15 кВА до 500 МВА, в том числе:
- Three phase dry type transformers
- Three phase oil immersed transformers
- Распределительные трансформаторы
- Силовые трансформаторы
- Трансформаторы, устанавливаемые на площадках
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
- Магнитный сердечник
- Система теплоизоляции
- Система охлаждения
- 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
Например:
Понижающий трансформатор
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
Высокий уровень пожарной безопасности
Отсутствие риска утечки масла
Неприхотливость в уходе
Подходит для установки в помещении
Экологически безопасный
Common Applications
Three phase dry type transformers are commonly installed in:
Коммерческие здания
Больницы
Аэропорты
Центры обработки данных
Промышленные объекты
Торговые центры
Typical ratings:
| Вместимость | Приложение |
|---|---|
| 15 кВА | Small commercial loads |
| 45 kVA | Industrial equipment |
| 75 кВА | Building power supply |
| 500 кВА | Factory distribution |
| 2500 кВА | 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.
Преимущества
- High power capacity
- Превосходная эффективность охлаждения
- Длительный срок службы
- Suitable for outdoor applications
Приложения
К числу типичных областей применения относятся:
- Коммунальные подстанции
- Солнечные фермы
- Ветряные электростанции
- Промышленные предприятия
- Power transmission systems
Typical voltage ratings:
- 6kV
- 10 кВ
- 11 кВ
- 13.8kV
- 35 кВ
- 110 кВ
- 220 кВ
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
Приложения:
- Жилые районы
- Commercial facilities
- Промышленные заводы
4. Three Phase Power Transformer
A трехфазный силовой трансформатор is used in high voltage transmission and substations.
Приложения:
- Электростанции
- Grid substations
- Проекты в области возобновляемой энергетики
Диапазон мощности:
From several MVA to hundreds of MVA.
Three Phase Transformer Applications
Промышленные энергетические системы
Factories rely on three phase transformers to supply power for:
- Двигатели
- Compressors
- Pumps
- Станки с ЧПУ
- Производственные линии
- Automation equipment
Industrial transformers usually require:
- Высокая эффективность
- Непрерывная работа
- Strong overload capability
Коммерческие здания
Three phase transformers are commonly used in:
- Офисные здания
- Отели
- Торговые центры
- Аэропорты
A common North American system:
480V → 208Y/120V
This voltage system is widely used for:
- Lighting
- Системы отопления, вентиляции и кондиционирования воздуха
- Building equipment
Проекты в области возобновляемой энергетики
Solar and wind projects require transformers to increase voltage before grid connection.
Пример:
Solar inverter:
800V
↓
Transformer:
0.8kV / 35kV
↓
Grid connection
Three Phase Transformer Voltage Ratings
Different countries use different voltage standards.
Северная Америка
Common voltages:
| Первичное напряжение | Вторичное напряжение |
|---|---|
| 480V | 208Y/120V |
| 600V | 347/600V |
| 13.8kV | 480V |
| 34,5 кВ | 480V |
International Markets
Common systems:
| Primary | Secondary |
|---|---|
| 10 кВ | 400V |
| 11 кВ | 415V |
| 20kV | 400V |
| 35 кВ | 400V |
EverNew transformers can be designed according to:
- IEC
- ANSI
- IEEE
- UL
- CSA
- CE
- ГОСТ
How To Select A Three Phase Transformer?
Для выбора подходящего трансформатора необходимо проанализировать ряд технических параметров.
1. Transformer Capacity (kVA)
The transformer capacity must match the electrical load.
Common sizes:
- 15 кВА
- 30 kVA
- 45 kVA
- 75 кВА
- 112,5 кВА
- 150 кВА
- 500 кВА
- 1000 кВА
- 2500 кВА
2. Входное и выходное напряжение
Пример:
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:
Сухой трансформатор
Outdoor:
Масляный трансформатор
5. Transformer Standards
Для реализации международных проектов может потребоваться:
- UL certification
- CSA certification
- DOE efficiency
- Стандарты МЭК
- Стандарты IEEE
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
Почему стоит выбрать трансформатор EverNew?
EverNew Transformer is a professional transformer manufacturer in China with more than 30 years of experience.
Our manufacturing capabilities include:
Product Range
- Распределительный трансформатор
- Сухой трансформатор
- Масляный трансформатор
- Трансформатор для монтажа на панель
- Силовой трансформатор
Technical Capability
Вместимость:
15 kVA – 500 MVA
Напряжение:
6kV – 500kV
Сертификаты
- UL
- CSA
- CE
- ГОСТ
- ISO
We supply transformers for:
- США
- Канада
- Южная Америка
- Европа
- Азия
- Африка
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
- 35 кВ
How much does a three phase transformer cost?
Цена зависит от:
- Transformer capacity
- Voltage rating
- Медная или алюминиевая обмотка
- Метод охлаждения
- Обязательные стандарты
- Order quantity
How do I choose a three phase transformer size?
You should consider:
- Total connected load
- Starting current
- Future expansion
- Требования к напряжению
- Efficiency requirements
Заключение
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
- Метод охлаждения
- Условия установки
- International standards
Как профессионал 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.
