Oil-Immersed Transformer: The Silent Guardian of Power Systems

What Is an Oil-Immersed Transformer?

An oil-immersed transformer is a type of power transformer that uses insulating oil as the primary insulation and cooling medium. It consists of a core, windings, an oil tank, insulating oil, cooling devices, and protective equipment.

Key Advantages

1. Efficient Cooling: Transformer oil has excellent thermal conductivity, effectively dissipating heat from the windings and core.

2. Reliable Insulation: The oil provides superior electrical insulation.

3. Strong Protection: The oil prevents oxidation of internal components, extending the equipment’s lifespan.

4. Cost-Effective: More economical for high-capacity applications compared to dry-type transformers.

Typical Applications

• Power plant step-up substations

• Electrical substations

• Industrial and mining power distribution systems

• Power transmission grid nodes

Maintenance Tips

1. Regularly check oil levels and quality.

2. Monitor operating temperature.

3. Inspect for oil leaks.

4. Periodically test oil samples.

With their stability and cost-effectiveness, oil-immersed transformers play an irreplaceable role in power transmission and distribution. As technology advances, modern oil-immersed transformers are becoming more efficient and environmentally friendly.