Oil lubricated distribution transformers are reliable electrical devices that play a critical role in converting electrical energy into different voltage levels. These transformers provide electrical insulation and cooling with the mineral oil they contain. They have advantages such as high durability, low maintenance and wide operating temperature range. Oil type transformers, which have a wide range of applications from industrial plants to commercial applications, are among the preferred solutions in terms of energy efficiency and reliability. These transformers are carefully designed and utilised as key elements of power distribution systems to ensure energy efficiency and operational safety.