Do electrical transformers have oil in them?

Yes, electrical transformers do have oil in them. The oil serves as an insulator and coolant, helping to dissipate heat generated during operation and preventing electrical arcing. Transformer oil also plays a crucial role in maintaining the integrity of the insulation system and protecting the core and windings from moisture and other contaminants. It’s important to monitor and maintain the quality of this oil to ensure optimal performance and longevity of the transformer. Regular testing and filtration can help in the cleaning and regeneration of transformer oil, enhancing its effectiveness as an insulating and cooling medium.