What is the difference between dry type transformer and oil type transformer in terms of transformer oil usage?

The difference between dry type transformer and oil type transformer in terms of transformer oil usage is significant. Oil type transformers utilize transformer oil for insulation and cooling, which enhances their thermal performance and electrical insulation properties. In contrast, dry type transformers do not use transformer oil; instead, they rely on air or solid insulation materials for cooling and electrical insulation, making them suitable for environments where oil leakage is a concern.