Single Phase Power Transformer: Complete Guide for Selection, Applications and Purchasing (2026)

Single phase power transformer manufacturer in China producing custom 10kVA-250kVA distribution transformers

Introduction: What Is a Single Phase Power Transformer?

A single phase power transformer is an electrical transformer designed to transfer electrical energy between two circuits using electromagnetic induction. It is mainly used in low-voltage and medium-voltage power distribution systems where single-phase loads are required.

Compared with three-phase transformers, single phase power transformers are typically used for residential power supply, rural electrification, small commercial facilities, agricultural applications, and distributed power networks.

As a professional nhà sản xuất máy biến áp một pha tại Trung Quốc, EverNew Transformer provides reliable single phase power transformers with capacities ranging from small distribution units to customized solutions for utility and industrial applications.

Our single phase transformers are manufactured according to international standards including IEC 60076, ANSI/IEEE requirements, and customer-specific specifications.

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Single Phase Power Transformer Working Principle

A single phase power transformer operates based on the principle of electromagnetic induction.

When alternating current flows through the primary winding, it creates a changing magnetic field inside the transformer core. This magnetic flux induces voltage in the secondary winding, allowing electrical energy to be transferred while changing the voltage level.

The transformer can:

  • Step down high voltage electricity for end users
  • Step up voltage for power transmission
  • Provide electrical isolation between circuits
  • Improve power distribution efficiency

The basic components include:

  • Silicon steel core or amorphous alloy core
  • Cuộn dây sơ cấp
  • Cuộn dây thứ cấp
  • Insulation system
  • Transformer tank
  • Cooling medium (oil or air)
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Single phase power transformer factory manufacturing 10kVA to 250kVA custom distribution transformers

Types of Single Phase Power Transformers

1. Single Phase Oil Immersed Power Transformer

Cái single phase oil immersed pad mounted transformer is one of the most commonly used solutions for outdoor power distribution.

The transformer windings and core are immersed in insulating oil, which provides:

  • Excellent insulation performance
  • Efficient heat dissipation
  • Long service life
  • Reliable outdoor operation

Typical applications:

  • Mạng lưới phân phối điện
  • Rural electrification projects
  • Cung cấp điện cho khu dân cư
  • Renewable energy systems

Common specifications:

Parameter Typical Range
Công suất định mức 5 kVA – 500 kVA
Voltage Class 6kV, 10kV, 11kV, 15kV, 20kV, 33kV
Tần số 50 Hz / 60 Hz
Cooling Type ONAN
Insulation Mineral oil / FR3 oil
Tiêu chuẩn IEC 60076
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2. Single Phase Pole Mounted Transformer

A máy biến áp một pha gắn trên cột is designed for overhead distribution systems.

It is widely installed on utility poles to supply electricity to residential customers and rural areas.

Ưu điểm:

  • Compact structure
  • Easy installation
  • Low maintenance
  • Suitable for outdoor environments

Typical capacities:

  • 10 kVA
  • 15 kVA
  • 25 kVA
  • 37.5 kVA
  • 50 kVA
  • 75 kVA
  • 100 kVA
  • 167 kVA

Pole mounted transformers are commonly used in:

  • North America
  • South America
  • Southeast Asia
  • Africa
  • Rural electrification projects
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3. Single Phase Dry Type Transformer

A máy biến áp một pha kiểu khô uses air or resin insulation instead of transformer oil.

It is suitable for applications requiring:

  • High safety
  • Fire resistance
  • Indoor installation

Common applications:

  • Buildings
  • Trung tâm dữ liệu
  • Hospitals
  • Industrial facilities

Ưu điểm:

  • No oil leakage risk
  • Environmentally friendly
  • Yêu cầu bảo trì thấp
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Single Phase Power Transformer vs Three Phase Transformer

Many customers ask whether they should choose a single phase or three phase transformer.

Comparison Single Phase Transformer Three Phase Transformer
Structure Simple Phức tạp hơn
Ứng dụng Single phase loads Industrial power systems
Cài đặt Flexible Centralized
Công suất Thường thì nhỏ hơn Medium to large capacity
Cost Lower initial investment Higher efficiency for large loads

A single phase transformer is usually the best choice when:

  • The electrical load is mainly residential
  • The power requirement is below several hundred kVA
  • The distribution system uses single-phase supply

How to Select the Right Single Phase Power Transformer?

Before purchasing a single phase transformer, buyers should consider the following factors:

1. Rated Capacity (kVA)

The transformer capacity should match the connected electrical load.

Common ratings:

  • 10 kVA
  • 25 kVA
  • 50 kVA
  • 75 kVA
  • 100 kVA
  • 167 kVA
  • 250 kVA

Selecting the correct kVA rating helps prevent overheating and improves transformer lifetime.

2. Primary and Secondary Voltage

The input and output voltage must match the power system requirements.

Examples:

  • 11kV / 0.415kV
  • 13.8kV / 240V
  • 22kV / 400V
  • 33kV / 0.4kV

3. Transformer Core Material

Modern single phase transformers commonly use:

Silicon Steel Core

Benefits:

  • Reliable performance
  • Competitive price
  • Widely available

Amorphous Alloy Core

Benefits:

  • Lower no-load losses
  • Higher energy efficiency
  • Suitable for utility projects

4. Applicable Standards

Depending on the destination market, transformers may need to comply with:

  • IEC 60076
  • IEEE C57
  • ANSI standards
  • CSA standards
  • Các yêu cầu về hiệu suất của Bộ Năng lượng (DOE)
  • GOST/EAC requirements
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Why Choose EverNew as Your Single Phase Transformer Supplier?

EverNew Transformer is an experienced nhà sản xuất máy biến áp một pha tại Trung Quốc, supplying distribution transformers to customers worldwide.

Our advantages include:

Professional Manufacturing Capability

  • More than 30 years of transformer manufacturing experience
  • Complete production facilities
  • Advanced winding and testing equipment
  • Strict quality control system

Wide Product Range

We provide:

  • Single phase power transformers
  • Single phase distribution transformers
  • Pole mounted transformers
  • Oil immersed transformers
  • Dry type transformers
  • Customized transformer solutions

Tiêu chuẩn quốc tế

Our transformers can be designed according to:

  • IEC 60076
  • ANSI/IEEE
  • CSA
  • Các yêu cầu về hiệu suất của Bộ Năng lượng (DOE)

Global Export Experience

We supply transformers for customers in:

  • USA
  • Canada
  • South America
  • Southeast Asia
  • Africa
  • Central Asia
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Frequently Asked Questions About Single Phase Power Transformers

What is a single phase power transformer used for?

A single phase power transformer is mainly used for residential distribution, rural electrification, small commercial buildings, and applications requiring single-phase power supply.

What is the price of a single phase transformer?

The price depends on:

  • Rated capacity
  • Voltage level
  • Transformer type
  • Core material
  • Tiêu chuẩn
  • Số lượng

For an accurate quotation, customers should provide transformer specifications and destination information.

Can you manufacture customized single phase transformers?

Yes. EverNew can customize:

  • Tỷ số điện áp
  • Công suất
  • Tần số
  • Cooling method
  • Core material
  • Accessories
  • Local standards

Request a Quote for Single Phase Power Transformer

Looking for a reliable single phase power transformer manufacturer?

EverNew Transformer provides high-quality single phase transformers for utility, industrial, and commercial power distribution applications.

Contact our engineering team today and send your requirements, including:

  • Công suất máy biến áp (kVA)
  • Primary voltage
  • Secondary voltage
  • Số lượng
  • Required standards
  • Delivery destination

We will provide a professional technical solution and competitive quotation.

Get your single phase power transformer quotation today.

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