Is there oil in transformers?

Yes, there is oil in transformers, specifically insulating oil, which is vital for cooling and insulating the internal components of the transformer. This oil helps to dissipate heat generated by the electrical connections and components, ensuring efficient operation. Additionally, the insulating properties of the oil prevent electrical arcing and short circuits within the transformer. Regular maintenance, including monitoring and testing the oil, is essential to ensure the transformer’s performance and longevity.