Dry-type transformer insulation

Hitachi Energy offers a wide range of flexible insulating laminates for dry-type transformers, both vacuum-cast resin and open wound.

Due to increasing demands for enhanced transformer performance, insulation materials are subject to ever-greater electrical and thermal loads. Our multi-layer flexible laminates - made from pressboard, polyester and polyamide films, polyester non-woven material, or aramid papers - have high mechanical resistance and special surface properties.

Our various methods of combining the materials and optional coatings mean we can tailor the insulation properties to suit every customer.

• More than 150 years of experience in insulation
• comprehensive range of insulation products  for dry-type transformers
• Material excellence
• Global footprint

• Dry-type transformers
• Epoxy prepregs (B-stage coated) based on Dacron-Mylar-Dacron (DMD) / Nomex-Mylar-Nomex (NMN) laminates and Nomex 410
• DMD saturated for insulation class F (155 °C)
• NMN for insulation class H (180 °C)