Overview of Oil Immersed Transformer

Oil immersed transformers are widely used in power transmission and distribution systems due to their high reliability, strong insulation performance, and efficient heat dissipation. These transformers use insulating mineral oil to cool and insulate the internal components, ensuring stable operation even under heavy electrical loads.

Oil-filled transformers are commonly applied in power plants, substations, industrial facilities, and renewable energy projects, providing efficient voltage conversion and reliable power supply for modern electrical infrastructure.

How Oil Immersed Transformers Work

An oil immersed transformer operates by transferring electrical energy between circuits through electromagnetic induction while using insulating oil for cooling and insulation.

Component	Function
Core	Transfers magnetic flux efficiently
Windings	Conduct electrical current and adjust voltage levels
Transformer Oil	Provides insulation and heat dissipation
Oil Tank	Houses internal components and insulating oil
Radiator / Cooling System	Removes heat generated during operation

During operation, the transformer oil circulates inside the tank, absorbing heat from the core and windings and transferring it to the cooling radiators, ensuring stable and safe performance.

Types of Oil Immersed Transformers

• Distribution Transformers – Used in local power distribution networks to supply electricity to residential and commercial users.
• Power Transformers – Designed for high-voltage transmission and large substations.
• Three-Phase Transformers – Commonly used in industrial and utility power systems.
• Renewable Energy Transformers – Integrated with solar farms and wind power plants.

Advantages of Oil Immersed Transformers

• Excellent Insulation Performance – Transformer oil provides strong dielectric strength
• Efficient Cooling – Oil circulation helps dissipate heat effectively
• High Reliability – Suitable for continuous operation in power grids
• Long Service Life – Typically operates for 25–30 years with proper maintenance
• High Load Capacity – Handles heavy electrical loads in industrial applications

Company Profile

Luoyang Datang Energy Technology Co., Ltd. is a high-tech enterprise integrating R&D, manufacturing, and supply of power equipment and renewable energy solutions. Specializing in transformers, new energy components, distribution cabinets, and inverters, we have expanded our portfolio to include solar power systems, energy storage solutions, and air source heat pumps. With technological innovation as our core, we focus on creating high-reliability and high-performance power and energy efficiency solutions to serve global customers. Through a strict quality control system and international standard certification, we continuously deliver excellent products that empower our customers to build safe, stable, and sustainable power systems.

If you are looking for a high-quality Oil immersed Transformer supplier, we invite you to contact us or click on related products to inquire.

Payment Methods for Oil-immersed Transformer

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment of Oil-immersed Transformer

Once payment is received, by sea, by air, or by express as soon as possible.

FAQs of Oil Immersed Transformers

1.What is an oil immersed transformer?

An oil immersed transformer is a transformer that uses insulating oil for cooling and electrical insulation during operation.

2.Why is transformer oil used?

Transformer oil provides both electrical insulation and heat dissipation, improving safety and operational efficiency.

3.What is the lifespan of an oil immersed transformer?

With proper maintenance, oil immersed transformers can operate reliably for 25–30 years or longer.

4.Where are oil immersed transformers used?

They are widely used in power plants, substations, industrial facilities, and renewable energy projects.

5.What is the difference between oil immersed and dry-type transformers?

Oil immersed transformers use insulating oil for cooling, while dry-type transformers rely on air or resin insulation.