The role of oil in an oil-filled transformer encompasses several functions, including the following:

Insulation: Oil serves as an excellent insulating medium, isolating the electrical components inside the transformer, such as windings and insulators, to prevent circuit shorts and electrical faults. It effectively prevents current from flowing where it shouldn't, ensuring the safe transmission of electricity.

Cooling: Oil is also used for heat dissipation, helping to control the temperature of the transformer. Transformers generate heat during operation, and the oil absorbs this heat, subsequently transferring it to the surrounding environment through a radiator, thus maintaining the transformer's temperature within a manageable range.

Maintenance: Oil is employed to preserve various components inside the transformer, such as windings and the iron core. It prevents air and moisture from coming into contact with internal parts, reducing the risks of oxidation and corrosion, and extending the transformer's lifespan.

Damping: Oil can also, to some extent, dampen mechanical shocks and vibrations, contributing to the protection of the transformer's structure and internal components.

In summary, oil plays a critical role in oil-filled transformers, providing essential electrical, thermodynamic, and maintenance functions to ensure the normal operation and long-term reliability of the transformer. Therefore, maintaining the quality and performance of the oil inside the transformer is of utmost importance, and regular oil quality testing and maintenance are key measures for transformer upkeep.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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