What is an oil filled self-cooled type transformer?

An oil filled self-cooled type transformer is a transformer that uses oil as both an insulator and a coolant. In this design, the heat generated during operation is dissipated through natural convection of the oil, which circulates within the tank. This self-cooling mechanism allows for efficient thermal management, ensuring that the transformer operates within safe temperature limits, thereby enhancing its reliability and lifespan in power distribution applications.