The technical characteristics of the H class no-encapsulated-winding dry-type power transformer with NOMEXpaper are introduced. Its cost is compared with the cast-resin dry-type transformer.

The formulation design, processing characteristic and material choice of winding without filling in epoxy resin cast dry-type transformer are introduced. The warnings in cast process are presented.

Epoxy cast dry-type distribution transformer high-voltage coil sealed by epoxy resin casting, using epoxy resin performance, cracking, high temperature, high mechanical strength, long life.