An Oil Cooled Transformer is a type of transformer that uses insulating mineral oil or biodegradable insulating fluid as both a cooling and insulation medium. The transformer oil effectively dissipates heat generated during operation while providing excellent electrical insulation between internal components, ensuring reliable and efficient performance. Operating on the principle of electromagnetic induction, oil cooled transformers are widely used in power generation, transmission, and distribution networks, as well as in industrial plants, commercial facilities, renewable energy projects, and utility substations. They are designed to handle high power loads and are available in a wide range of capacities and voltage levels. Their robust construction, high efficiency, superior cooling capability, and long operational life make them an ideal choice for continuous and heavy-duty applications where dependable power distribution is essential.