Dry type transformers are widely used in local lighting, high-rise buildings, airports, terminals, CNC mechanical equipment and other places. Simply speaking, 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). In case of natural air cooling, the transformer can operate continuously for a long time under rated capacity. In case of forced air cooling, the output capacity of transformer can be increased by 50%. It is applicable to intermittent overload operation or emergency overload operation; Due to the large increase of load loss and impedance voltage during overload, it is in a non economic operation state, so it should not be in a long-term continuous overload operation.
2023/01/06
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