What are the differences between a cast resin transformer and an oil transformer?

The differences between a cast resin transformer and an oil transformer primarily lie in their insulation and cooling methods. A cast resin transformer uses epoxy resin for insulation, providing superior moisture resistance and lower fire risk. In contrast, an oil transformer utilizes mineral oil for insulation and cooling, allowing for higher power ratings and better heat dissipation. Additionally, oil transformers require more maintenance due to the need for oil management and monitoring.