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.

Como profissional single phase transformer manufacturer in China, 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.

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
• Enrolamento primário
• Enrolamento secundário
• Insulation system
• Transformer tank
• Cooling medium (oil or air)

Types of Single Phase Power Transformers

1. Single Phase Oil Immersed Power Transformer

O 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:

• Redes de distribuição de serviços públicos
• Rural electrification projects
• Residential power supply
• Sistemas de energia renovável

Common specifications:

2. Single Phase Pole Mounted Transformer

A transformador monofásico montado em poste is designed for overhead distribution systems.

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

Vantagens:

• Compact structure
• Easy installation
• Baixa manutenção
• 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:

• América do Norte
• América do Sul
• Sudeste Asiático
• África
• Rural electrification projects

3. Single Phase Dry Type Transformer

A single phase dry type transformer uses air or resin insulation instead of transformer oil.

It is suitable for applications requiring:

• High safety
• Fire resistance
• Instalação em ambientes internos

Common applications:

• Buildings
• Centros de dados
• Hospitais
• Instalações industriais

Vantagens:

• No oil leakage risk
• Environmentally friendly
• Low maintenance requirements

Single Phase Power Transformer vs Three Phase Transformer

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

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

Benefícios:

• Reliable performance
• Competitive price
• Widely available

Amorphous Alloy Core

Benefícios:

• 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
• DOE efficiency requirements
• GOST/EAC requirements

Why Choose EverNew as Your Single Phase Transformer Supplier?

EverNew Transformer is an experienced single phase transformer manufacturer in China, 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
• Transformadores montados em postes
• Transformadores imersos em óleo
• Transformadores do tipo seco
• Customized transformer solutions

International Standards

Our transformers can be designed according to:

• IEC 60076
• ANSI/IEEE
• CSA
• DOE efficiency requirements

Experiência global em exportação

We supply transformers for customers in:

• EUA
• Canadá
• América do Sul
• Sudeste Asiático
• África
• Ásia Central

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:

• Capacidade nominal
• Voltage level
• Tipo de transformador
• Material principal
• Padrões
• Quantidade

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

Can you manufacture customized single phase transformers?

Yes. EverNew can customize:

• Taxa de tensão
• Capacidade
• Frequência
• Método de resfriamento
• Material principal
• Acessórios
• 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:

• Transformer capacity (kVA)
• Tensão primária
• Tensão secundária
• Quantidade
• Required standards
• Delivery destination

We will provide a professional technical solution and competitive quotation.

Get your single phase power transformer quotation today.