Structural characteristics of dry-type transformers

Due to its strong short-circuit resistance, low maintenance workload, high operating efficiency, small size, and low noise, dry-type transformers are commonly used in places with high performance requirements such as fire and explosion prevention.
1. Safe, fireproof, pollution-free, and can operate directly in the load center;
2. Adopting advanced domestic 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, significant energy-saving effect, maintenance free;
4. Good heat dissipation performance, strong overload capacity, and can increase capacity operation when forced air cooling;
5. Good moisture resistance, suitable for operation in high humidity and other harsh environments;
6. Dry type transformers can be equipped with comprehensive temperature detection and protection systems. Adopting an intelligent signal temperature control system, it can automatically detect and display the working temperature of each three-phase winding, automatically start and stop the fan, and have functions such as alarm and trip settings;
7. Small size, light weight, small footprint, and low installation cost.
Iron core
High quality cold-rolled grain oriented silicon steel sheets are used, and the iron core silicon steel sheets adopt 45 degree fully oblique joints, allowing magnetic flux to pass along the direction of the silicon steel sheet joints.
Winding form
⑴ Entanglement;
⑵ Epoxy resin and quartz sand filling and pouring;
⑶ Glass fiber reinforced epoxy resin casting (i.e. thin insulation structure);
⑷ Multi strand glass fiber impregnated epoxy resin winding type (usually using 3, because it can effectively prevent the resin from cracking and improve the reliability of the equipment).
High voltage winding
Generally, multi-layer cylindrical or multi-layer segmented structures are used.