Dry-type transformers are widely used in local lighting, high-rise buildings, airports, terminals, CNC machinery and equipment, etc. Simply put, dry-type transformers refer to transformers whose core and windings are not immersed in insulating oil.
Cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When naturally air-cooled, the transformer can operate continuously for a long time at rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; because the load loss and impedance voltage increase greatly during overload, it is in a non-economic operating state, so it should not be placed in long-term continuous overload operation.
Dry-type transformers are widely used in local lighting, high-rise buildings, airports, terminals, CNC machinery and equipment, etc. Simply put, dry-type transformers refer to transformers whose core and windings are not immersed in insulating oil.
Cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When naturally air-cooled, the transformer can operate continuously for a long time at rated capacity. When forced air cooling is used, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; because the load loss and impedance voltage increase greatly during overload, it is in a non-economic operating state, so it should not be placed in long-term continuous overload operation.
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 protection and explosion-proof. [7]
1. Safe, fireproof, non-polluting, and can be run directly in the load center;
2. Adopting domestic advanced technology, it has 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 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 complete temperature detection and protection systems. Adopting an intelligent signal temperature control system, it can automatically detect and display the respective operating temperatures of the three-phase windings. It can automatically start and stop the fan, and has alarm, trip and other function settings;
7. Small size, light weight, less space occupied and low installation cost.
iron core
High-quality cold-rolled grain-oriented silicon steel sheets are used, and the core silicon steel sheets adopt 45-degree fully oblique joints to allow magnetic flux to pass along the joint direction of the silicon steel sheets.
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