What are the types of oil-filled transformers?

The types of oil-filled transformers include conventional oil-filled transformers, which utilize mineral oil as insulation and cooling, and bio-oil-filled transformers, which use biodegradable oils derived from renewable sources. Additionally, there are sealed oil-filled transformers that prevent moisture ingress and enhance insulation properties. Each type of oil-filled transformer is designed to meet specific operational and environmental requirements in power distribution systems.