Cast resin dry-type transformer

In the planning of modern infrastructure—from shopping malls and hospitals to wind farms and high-density industrial plants—the choice of power transformation system is decisive. The cast resin dry-type transformer has established itself as the preferred technical solution where personal safety and service continuity are non-negotiable. Unlike oil-immersed units, this technology eliminates environmental and fire risks, allowing for much more flexible and secure architectural integration. At EREMU, we elevate this standard through manufacturing processes that guarantee a superior service life even under the harshest conditions.

What makes cast resin encapsulation different?

The essence of the cast resin dry-type transformer lies in its insulation system. The medium voltage windings are completely sealed in a mixture of epoxy resin and mineral fillers using a vacuum casting process.

This shielding is not just a physical barrier; it is comprehensive protection that provides the equipment with exceptional properties:

Self-extinguishing properties: In the event of an external electric arc or a nearby fire, the resin does not spread the flame or emit significant toxic gases (F0 and F1 classes).
Mechanical strength: The solid encapsulation protects the coils against mechanical stresses produced by short circuits and vibrations.
Environmental immunity: Humidity, dust, and chemical pollution cannot penetrate the windings, allowing operation in environments with high humidity or severe contamination (E2 and C2 classes).

Operational advantages for Industry 4.0

Choosing a cast resin dry-type transformer from EREMU is not just a safety decision, but also one of operational efficiency and long-term cost savings.

Virtually zero maintenance

By lacking dielectric liquids, tasks such as filtering, gas analysis, or oil rigidity tests are eliminated. Furthermore, the construction of spillage collection pits is not required, which drastically reduces civil engineering costs and simplifies environmental audits.

Proximity to the load center

Thanks to their high safety rating, these transformers can be installed inside buildings, basements, or even near work areas. This reduces the length of low-voltage cables, minimizing Joule effect losses and improving the voltage regulation of the installation.

Sustainability and Life Cycle

Commitment to the environment is a key factor in modern engineering. The cast resin dry-type transformer is inherently more ecological than its oil-based alternatives:

Zero spill risk: It eliminates the possibility of soil or aquifer contamination due to coolant leaks.
Recyclable materials: At the end of its service life, the conductive materials (copper or aluminum) and the silicon steel core can be efficiently recovered.
Energy efficiency: EREMU’s modern designs strictly comply with European ecodesign regulations (Tier 2), reducing no-load and load losses, which decreases the installation’s carbon footprint.

Applications in mission-critical environments

Given its characteristics, the cast resin dry-type transformer is the mandatory choice for:

Data Centers (DC): Where reliability and harmonic management are crucial.
Healthcare Sector: Hospital facilities where fire safety is critical for evacuation.
Renewable Energy: Especially in wind turbine towers, where space is limited and fire risk must be zero.
Transport Infrastructure: Subway stations, tunnels, and airports.

Conclusion: An investment in peace of mind

The cast resin dry-type transformer represents the perfect balance between power, safety, and environmental respect. At EREMU, every unit is the result of meticulous engineering, designed to offer uninterrupted performance in the most demanding 21st-century environments.

By choosing our technology, you are not just acquiring electrical equipment; you are integrating a long-lasting solution into your project that protects your most valuable assets: your facilities and, above all, the people who depend on them.

Do you need a safe and efficient transformation solution?

At EREMU, we specialize in the custom design of each cast resin dry-type transformer. Our technical team will advise you on finding the optimal configuration based on your load level and environmental conditions.