Dry-type Three-dimensional Wound Iron Core Transformer
04-08 2025 | By:
Dry-type three-dimensional wound iron core transformer
Dry-type three-dimensional wound iron core transformer is a transformer that does not use insulating oil. Its core and winding are not immersed in insulating oil, and air or other gases such as SF6 are used as cooling media. This type of transformer relies on air convection for cooling, which is usually divided into two methods: natural air cooling and forced air cooling. When naturally air cooled, the transformer can operate continuously for a long time at rated capacity; when forced air cooled, the output capacity of the transformer can be increased by 50%, which is suitable for intermittent overload operation or emergency overload operation.
Structural features
The core and winding of the dry-type three-dimensional wound iron core transformer are usually encapsulated with epoxy resin casting. There are also non-encapsulated types. The windings are impregnated with special insulating paper and special insulating paint to prevent the windings or cores from getting wet. This structure gives the dry-type transformer the following advantages: Good fire resistance: no flammable resin, no toxic gas, not easy to spontaneously combust. Low loss and low noise: high operating efficiency and low noise. No pollution: maintenance-free and environmentally friendly. Good insulation performance: no partial discharge, strong resistance to lightning strike.
Good mechanical strength: strong resistance to temperature changes and short circuits.
Moisture resistance: can work under high humidity.
Economical installation: small size, light weight, easy installation.
Automatic temperature monitoring and protection: with temperature monitoring and protection functions
Application scenarios
Dry-type three-dimensional wound core transformers are widely used in local lighting, high-rise buildings, airports, dock crane machinery and equipment, residential electricity and other places. Due to its excellent fireproof, explosion-proof and moisture-proof properties, it is particularly suitable for high-rise buildings, airports, power stations, commercial centers and other important places in urban power grid transformation
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