What is the role of oil in an electric transformer?

Oil plays a crucial role in an electric transformer, particularly in oil immersed transformer parts. It acts as an insulating medium, preventing electrical discharge between conductors and various components. Additionally, the oil provides effective thermal management by absorbing and transferring heat generated during the transformer’s operation, thereby enhancing efficiency. It also serves as a coolant, helping to maintain optimal temperatures and protect against overheating. The oil aids in suppressing arcing between the transformer windings and other parts, ensuring stable operation. Moreover, it helps in moisture control within the transformer’s environment, crucial for maintaining the integrity of the insulating materials and overall functionality of oil immersed transformer parts.