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Product Features of Epoxy Resin Dry-Type Transformers
Epoxy Resin Dry-Type Transformer It is our company’s flagship product, offering dustproof, moisture-proof, and maintenance-free performance. It is widely used in high-rise buildings, commercial centers, theaters, hospitals, industrial and mining enterprises, offshore oil drilling platforms, ships, subways, railway stations, airports, power plants, residential communities, and other high-rise structures.
1. High-voltage coil
The high-voltage winding is of a segmented cylindrical type, cast under vacuum with high-quality epoxy resin and cured to form a robust monolithic structure. This design results in low partial discharge levels and high electrical strength of the windings. Both the inner and outer surfaces of the windings are reinforced with glass-fiber mesh fabric to enhance mechanical strength, thereby improving the product’s ability to withstand sudden short-circuit conditions and preventing winding cracking.
2. Low-voltage coil
The low-voltage winding adopts a foil-type structure (with large-capacity units employing the foil design and small-capacity units using vacuum impregnation), which ensures more balanced ampere-turns. In addition, axial cooling air ducts are incorporated into the winding to enhance heat dissipation. DMD epoxy-resin prepreg is used as interlayer insulation between winding turns, and the entire assembly is cured and formed as a single unit, resulting in high mechanical strength and excellent reliability.
3. Core
The core is manufactured using brand-new, high-quality cold-rolled grain-oriented silicon steel sheets, featuring a 45° fully skewed lamination joint structure. The core limbs are bound with DMD prepreg tape, and the core surface is encapsulated with core-specific epoxy resin, which effectively reduces no-load losses, no-load current, and core noise. In addition, the clamping yokes and fasteners undergo special surface treatments, resulting in a cleaner and more aesthetically pleasing product appearance.
4. Temperature Control System and Air Cooling System
A horizontal-flow cooling fan specially designed for dry-type transformers is employed. This fan features low noise, high airflow, and an aesthetically pleasing appearance, thereby enhancing the transformer’s overload capacity. Temperature control is implemented using an intelligent temperature controller, which improves the operational safety and reliability of the transformer.
5. Protective Enclosure
The protective enclosure provides additional safety protection for both the transformer and personnel, with ingress protection ratings such as IP20 and IP30. Enclosure materials available for customer selection include aluminum alloy, stainless steel, and cold-rolled steel sheet.
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