Epoxy Resin Dry Transformer

VKE is pleased to announce the successful delivery of a batch of epoxy resin dry-type transformers to a valued client in perfect condition. These customized transformers will be deployed for the rural power grid renovation project in Luzhou, Sichuan, providing reliable and efficient power distribution support for local infrastructure development.

Epoxy resin dry-type transformers utilize epoxy resin as the primary insulation material. Through advanced vacuum casting or winding processes, the windings are fully encapsulated in epoxy resin, forming a solid insulation structure that eliminates the need for insulating oil. This design offers excellent electrical performance, enhanced safety, and strong environmental adaptability.

Temperature: -25℃~40℃

Altitude: 100 meters or less

Insulation Class: F

Frequency: 50Hz

Cooling Type: AN/FN

The oil-free design eliminates the risk of oil leakage, ensuring enhanced safety and reliability. It is particularly suitable for high-fire-risk applications, including high-rise buildings, subway systems, data centers, and other critical facilities.

After curing, epoxy resin provides excellent mechanical strength, superior resistance to moisture and corrosion, and stable insulation performance, ensuring reliable operation in demanding environments.

With no oil aging concerns, the transformer offers an extended service life, reduced maintenance requirements, and lower lifecycle operating costs.

The cooling system typically adopts air natural cooling (AN) or air forced cooling (AF). Selected models are equipped with intelligent temperature monitoring and control systems to optimize heat dissipation and improve operational efficiency.

Copper Wires

Excellent Electrical Conductivity, Superior Heat Resistance, Extended Service Life

Silicon Steel Sheets

Low Noise, Stable Operation, Superior Performance

Epoxy Resin

High Temperature/Voltage Resistant

Crossflow Air Cooler

Lower Temperatures, Larger Heat Exchange Surfaces, Higher Efficiency

1. Ensure that the casting mold is clean and dry to prevent any contamination or defects that may affect casting quality.

2. Place the coil into the casting mold and ensure that the mold edges and lead terminals are properly sealed to prevent resin leakage during the casting process.

3. Carefully suspend the mold inside the casting tank, ensuring stable positioning throughout the casting operation.

4. The preparation of epoxy resin is a critical step in the entire casting process. The required amount of resin mixture must be accurately calculated based on the number, specifications, and quantity of coils to be cast. The mixing process must strictly follow technical requirements, including the correct mixing ratio, mixing duration, and stirring speed, to ensure the resin mixture meets the required quality standards.

Vacuum Casting Machine

After casting, the curing process should be initiated promptly to minimize exposure to low-temperature conditions. Epoxy resin requires precise temperature control and sufficient curing time to achieve complete hardening and optimal mechanical and electrical performance. Prolonged exposure to low temperatures may adversely affect the curing reaction, potentially compromising the quality and reliability of the finished insulation structure.

Once the curing process is completed, the coil is carefully removed from the mold, a procedure known as demolding. After demolding, the coil is re-hoisted and transferred to an oven for gradual cooling. This process must be performed with strict care to prevent mechanical stress, damage, or deformation, ensuring the final product maintains its structural integrity and performance.

Epoxy Windings