Cast-resin power transformers encase the windings in epoxy resin. These transformers simplify installation since they are dry, without cooling oil, and so require no fire-proof vault for indoor installations. The epoxy protects the windings from dust and corrosive atmospheres. However, because the molds for casting the coils are only available in fixed sizes, the design of the transformers is less flexible, which may make them costlier if customized features (voltage, turns ratio, taps) are required.

Type: Dry

Windings: Aluminum/Copper

Capacities: 500 KVA – 3150 KVA

Frequency: 50/60 Hz

IEC Standards


  • Self-extinguishing, low fire hazard
  • Zero oil usage
  • Eco-friendly and safe
  • Low cost installation and lower Load losses
  • Low maintenance
  • High short time overload capacity
  • Crack-resistant
  • Moisture-resistant
  • Low noise levels
  • Compact design
  • Sustainable