As power infrastructure modernizes, dry type transformers have become a preferred choice for applications where safety, fire resistance, and low maintenance are priorities. Unlike oil-immersed transformers, dry type units use air or epoxy resin for insulation—making them ideal for indoor and environmentally sensitive installations.

How Dry Type Transformers Work

Dry type transformers operate without oil as a cooling medium. The windings and core are insulated using epoxy resin or other cast materials, which dissipate heat naturally through air circulation or forced ventilation. This design eliminates the risk of oil leaks and reduces fire hazards.

Key Types

1. Cast Resin (CRT): Windings are fully encapsulated in epoxy resin, providing excellent moisture and dust resistance.

2. Vacuum Pressure Impregnated (VPI): Windings are impregnated with varnish under vacuum and pressure, offering strong mechanical strength and thermal stability.

Degatech Electric Co. Ltd designs both CRT and VPI types to serve diverse industrial requirements.

Advantages of Dry Type Transformers

• Safety: Non-flammable insulation eliminates explosion risks.

• Environmental Protection: No oil means no leakage or contamination.

• Low Maintenance: No need for oil testing, filtration, or fire suppression systems.

• Compact Design: Suitable for confined indoor spaces such as commercial buildings and factories.

• Durability: Excellent resistance to short circuits and temperature variations.

Common Applications

Dry type transformers are used in:

• Hospitals and office complexes

• Industrial control rooms

• Wind and solar power systems

• Marine and mining sectors

• Urban distribution networks

Degatech’s dry type transformers meet strict international standards for energy efficiency and insulation performance, ensuring stable and safe operation in demanding environments.

Technical Design and Efficiency

Degatech’s transformers feature Class F or H insulation systems with high thermal endurance. Cooling options include natural air (AN) or forced air (AF) configurations, depending on load conditions. They are designed to minimize losses and enhance energy efficiency over a 25-year service life.

Conclusion

As the world moves toward greener and safer electrical systems, dry type transformers continue to play a vital role in modern power distribution. Degatech Electric Co. Ltd stands as a trusted manufacturer providing high-performance solutions that combine safety, efficiency, and sustainability.