what is oil transformer?

An oil transformer, also known as an oil-filled transformer, is a type of electrical transformer that uses oil as an insulating and cooling medium. The oil surrounds the transformer’s core and windings, providing electrical insulation and dissipating heat generated during operation. This design enhances the transformer’s efficiency and longevity, making it suitable for high-voltage applications. Oil transformers are commonly used in power distribution systems and substations due to their reliability and performance.