Single-Phase Oil Transformer: Understanding, Advantages, and Applications

1. Introduction to Single-Phase Oil Transformers

A single-phase oil transformer is a crucial electrical device in power transmission and distribution systems. Its main function is to transform voltage, ensuring voltage stability, safety, and efficiency during electricity use.

2. Structure and Operating Principle

A single-phase oil transformer consists of three main components: the core, the windings, and the transformer oil.

• Core: Made from electrical steel sheets, the core is designed to minimize magnetic field losses.
• Windings: Consist of two coils, the primary and secondary windings, made from copper or aluminum. The current passes through these windings to create a magnetic field.
• Transformer oil: This insulating oil not only serves as an insulator but also cools the transformer.

The operating principle of a single-phase oil transformer is based on electromagnetic induction. When alternating current flows through the primary winding, it creates a varying magnetic field. This magnetic field induces a voltage in the secondary winding, generating an output voltage.

3. Advantages of Single-Phase Oil Transformers

a. High Efficiency

Single-phase oil transformers can efficiently transmit electrical energy with minimal losses. This helps save energy and reduce operational costs.

b. Good Cooling Capability

Transformer oil not only acts as an insulator but also helps cool the transformer. This ensures stable operation, reduces the risk of fire and explosion, and extends the equipment’s lifespan.

c. Durability and Reliability

Single-phase oil transformers are designed to withstand harsh operating conditions. Their high durability and stable long-term operation are key reasons for their widespread use.

4. Applications of Single-Phase Oil Transformers

Single-phase oil transformers are widely used in various fields, including:

a. Home Electrical Systems

In households, single-phase oil transformers are commonly used to step down high voltage to levels suitable for household electrical appliances.

b. Industrial and Commercial

In factories, workshops, and commercial facilities, single-phase oil transformers help provide stable voltage for machinery, equipment, and lighting systems.

c. Substations

Single-phase oil transformers are also used in small substations, where voltage needs to be converted to match the regional grid.

5. Specifications

CTC’s transformer testing laboratory meets Vilas standards

Meet standards according to quality management systems

•  Measurement of winding resistance
•  Measurement of voltage ratio and check of phase displacement
•  Measurement of short-circuit impedance and loss
•  Measurement of no-load loss and current
•  Dielectric routine tests
•  Tests on on-load tap-changers, where appropriate
•  Leak testing with pressure for liquid-immersed transformers(tightness test)
•  Tightness tests and pressure tests for tanks for gas-filled transformers
•  Check of the ratio and polarity of built-in current transformers
•  Check of core and frame insulation for liquid immersed transformers with core or frame insulation

The transformer manufacturing plant of CTC in Vietnam

CTC specializes in providing products such as Oil Transformer, Amorphous Transformer, Dry Transformer, Reactor Coil, and other electrical equipment. With 15 years of experience in the field of electricity and transformer manufacturing, we are confident that we can provide you with the optimal solution