What are oil-filled transformers used for?

Oil-filled transformers are used to step up or step down voltage in electrical power systems while providing effective insulation and cooling for the transformer’s internal components. The oil acts as both an insulator to prevent electrical discharges and a coolant to dissipate heat generated during operation. These transformers are commonly used in high-voltage applications such as power distribution, industrial settings, and transmission networks due to their reliability and efficiency.