The main components of dry-type transformers are iron core and windings. The iron core is made of high-quality grain-oriented silicon steel sheets with good magnetic permeability. The winding is made of high-quality copper foil, which has good conductivity and can effectively reduce the amount of partial discharge. The shape is molded by epoxy resin, with good heat resistance and insulation performance. Cooling methods are divided into air self-cooling and fan cooling. Under normal conditions, air self-cooling is used. Under fan cooling, it can run stably for a period of time with 50% overload. Cooling methods are divided into natural air cooling (AN) and forced air cooling (AF).
Dry-type transformers are widely used in local lighting, high-rise buildings, airports, terminal CNC machinery equipment and other places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil.
What are the structural characteristics of dry-type transformers?
1. Safe, fireproof, pollution-free, and can run directly in the load center;
2. Using domestic xianjin 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, maintenance-free;
4. Good heat dissipation performance, strong overload capacity, and capacity operation can be increased when forced air cooling;
5. Good moisture-proof performance, adapt to high humidity and other harsh environments;
6. Dry-type transformers can be equipped with a complete temperature detection and protection system. Using intelligent signal temperature control system, it can automatically detect and circulate display the respective working temperature of the three-phase winding, can automatically start and stop the fan, and have alarm, trip and other functions;
7. Small size, light weight, less space and low installation cost.
