In the design and manufacturing process of dry-type transformers, applying a layer of epoxy resin coating to the iron core serves several important purposes and functions:

Enhancement of Insulation Performance: The epoxy resin coating effectively enhances the insulation performance of the iron core. As a crucial component of the transformer, the insulation quality of the iron core directly affects the safety and stability of the transformer. Applying epoxy resin helps isolate the iron core from air and moisture, reducing the risks of electrical arcing and breakdown between insulation materials and the iron core, thereby enhancing the insulation capability of the transformer.

Rust and Corrosion Prevention: Iron cores are typically composed of silicon steel laminations, which are susceptible to corrosion from moisture and oxygen in the environment, leading to rust and deterioration. The coating forms a protective layer that prevents oxygen and moisture from contacting the iron core's surface, thereby extending the iron core's lifespan.

Vibration and Noise Reduction: During transformer operation, the iron core may be subjected to vibration and resonance, resulting in noise generation. The coating increases the stiffness and stability of the iron core, reducing vibration and noise generation, and improving the working environment of the transformer.

Thermal Dispersion and Heat Dissipation: Transformers generate heat during operation, and the iron core, being a vital part of the transformer, needs to efficiently dissipate heat to prevent overheating damage. The epoxy resin coating helps improve the iron core's ability to disperse heat, assisting in maintaining the transformer's normal operating temperature.

Noise Reduction: Iron cores can generate magnetic vibrations and noise during transformer operation. The epoxy resin coating helps reduce the propagation of these vibrations and noise.

In summary, applying an epoxy resin coating to the iron core of dry-type transformers serves to enhance insulation performance, prevent corrosion, reduce noise, and improve heat dispersion, thereby enhancing the transformer's reliability, durability, and overall performance.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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