Structural characteristics of dry-type transformers

Because dry-type transformers have the advantages of strong short-circuit resistance, low maintenance workload, high operating efficiency, small size, and low noise, they are often used in places with high performance requirements such as fire prevention and explosion prevention.
1. Safe, fireproof, pollution-free, and can be directly operated at the load center;
2. Adopting domestic advanced technology, high mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, high reliability, and long service life;
3. Low loss, low noise, obvious energy-saving effect, and maintenance-free;
4. Good heat dissipation performance, strong overload capacity, and can increase capacity operation when forced air cooling;
5. Good moisture-proof performance, suitable for operation in high humidity and other harsh environments;
6. Dry-type transformers can be equipped with a complete temperature detection and protection system. The intelligent signal temperature control system can automatically detect and display the operating temperature of each three-phase winding, automatically start and stop the fan, and have alarm, tripping and other function settings;
7. Small size, light weight, small footprint, and low installation cost.
The core is made of high-quality cold-rolled grain-oriented silicon steel sheets, and the core silicon steel sheets adopt 45-degree full-bevel joints to allow the magnetic flux to pass along the direction of the silicon steel sheet joints.
Winding form
⑴ Winding;
⑵ Epoxy resin plus quartz sand filling and pouring;
⑶ Glass fiber reinforced epoxy resin pouring (i.e. thin insulation structure);
⑷ Multi-strand glass fiber impregnated epoxy resin winding (generally 3 is used, because it can effectively prevent the poured resin from cracking and improve the reliability of the equipment).
High-voltage winding
Generally, a multi-layer cylindrical or multi-layer segmented structure is used.