Transformer oil：What You Need to Know

Transformer oil, or insulating oil, is a type of oil that is stable at high temperatures and has excellent electrical insulating properties. Its functions include insulation, suppressing corona discharge and arcing, and serving as a coolant. The quality of transformer oil directly affects the operating efficiency and lifespan of the transformer.

Functions

1. Insulation: Transformer oil has excellent insulating properties, which can effectively prevent arcing and short circuits, ensuring the safe operation of the transformer.
2. Cooling: During operation, transformers generate a significant amount of heat. Transformer oil can dissipate this heat through convection and conduction, maintaining the transformer’s temperature within a safe range.
3. Protection: Transformer oil can prevent oxidation and corrosion of the internal metal components of the transformer, thereby extending its service life.

Features

1. High Insulation: Transformer oil has a high dielectric strength, which allows it to withstand high voltages and prevent electrical faults.
2. Good Thermal Stability: At high temperatures, transformer oil does not decompose or produce harmful substances, enabling long-term stable operation.
3. Low Viscosity: The low viscosity of transformer oil aids in the flow and heat dissipation of the oil, ensuring efficient cooling of the transformer.
4. Oxidation Resistance: Transformer oil with added antioxidants can slow down the aging of the oil and increase its lifespan.

Advantages and Disadvantages

Advantages:

1. Efficient Insulation and Cooling: Provides reliable electrical insulation and heat dissipation, ensuring the safe operation of the transformer.
2. Extended Equipment Lifespan: Protects internal components from oxidation and corrosion, thereby extending the transformer’s service life.
3. Low Maintenance Costs: Due to the stability and durability of transformer oil, maintenance and replacement frequencies are reduced.

Disadvantages:

1. Environmental Issues: Transformer oil leaks can cause environmental pollution, requiring strict management and handling.
2. Fire Risk: In extreme conditions, transformer oil can pose a fire hazard, necessitating fire prevention measures.
3. Higher Cost: High-quality transformer oil is relatively expensive, increasing the initial investment.