What is the main reason for using oil in transformers?

The primary reason for using oil in transformers is its role as both an insulating and cooling agent. Transformer oil serves to insulate the electrical components, helping prevent short circuits and providing a barrier against electrical breakdowns. Additionally, the oil absorbs and dissipates heat generated during the operation of the transformer, which is crucial for maintaining optimal temperatures and ensuring efficiency.

By facilitating heat transfer away from critical components, transformer oil helps to prevent overheating, which can lead to increased wear or damage, and can ultimately affect the reliability and lifespan of the transformer. The combination of insulating properties and cooling capacity makes oil an essential component in transformer operation, ensuring safety and efficiency are maintained during electrical energy transformations.