A cast resin transformer is called so because of the manufacturing process and the materials used in its construction.
The term "cast resin" refers to the insulation material used in the transformer. Instead of using traditional insulation materials such as oil or paper, cast resin transformers use epoxy resin as the primary insulation material. Epoxy resin is a type of thermosetting plastic that can be cast into various shapes and forms. It has excellent electrical and mechanical properties, making it suitable for transformer applications.
During the manufacturing process of a cast resin transformer, the windings and core are encapsulated in the epoxy resin. The resin is poured or cast around the windings and core, filling all the voids and creating a solid, monolithic structure. This encapsulation provides excellent protection and insulation for the transformer components, making it highly resistant to moisture, chemicals, and environmental factors.
The use of epoxy resin as the primary insulation material offers several advantages. It provides better thermal stability, improved resistance to short circuits, and reduced fire hazard compared to traditional transformers that use oil as an insulating medium. Additionally, cast resin transformers are more environmentally friendly as they do not require oil for cooling and insulation.
So, the name "cast resin transformer" reflects the use of epoxy resin as the primary insulation material and the casting process involved in its manufacturing.
