What is an oil immersed transformer according to the wiki?

An oil immersed transformer, according to the wiki, is a type of transformer that uses oil as an insulating and cooling medium. The oil provides electrical insulation between the internal components and helps dissipate heat generated during operation. This design enhances the transformer’s efficiency and reliability, allowing it to operate at higher voltages and currents while maintaining safe temperature levels. Oil immersion also protects against environmental factors and moisture.