Application Of Epoxy Resin Insulators In Dry-type Transformers And Bushings

Dry-type transformers often use epoxy casting or impregnation techniques to manufacture windings and insulation structures. This construction stems from the widespread application of high voltage standoff insulators material in the field of electrical insulation. In real-world engineering practice, the insulation materials of electrical equipment must not only withstand complex electric fields and thermal stresses, but also adapt to the load requirements of long-term operation under high-voltage environments. High-voltage insulation materials need to have stable dielectric properties and characteristics that are compatible with processing technology, which provides a practical basis for high voltage epoxy to be used in such equipment.

In dry-type transformers, epoxy resin insulator materials are often used in conjunction with other insulating media through vacuum impregnation to form an integrated insulation system. This structure allows the gap between the winding and the substrate to be effectively filled, improving the uniformity of the electric field conditions in space, while reducing the local electric stress changes caused by the discontinuity of the dielectric. For dry bushings, epoxy composite materials have been gradually introduced into high-voltage insulation processing technology in recent years. By combining them with glass fiber or synthetic fiber cloth, the bushing can be formed.