Dry transformer is widely used in local lighting, high-rise buildings, airports, terminals CNC mechanical equipment and other places, simply said dry transformer refers to the core and winding are not impregnated in the transformer insulation oil.
The cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When air cooled naturally, the transformer can run continuously for a long time under rated capacity. When forced air cooling, transformer output capacity can be increased by 50%. Suitable for intermittent overload operation, or emergency overload operation; Because the load loss and impedance voltage increase greatly during overload, it is in non-economic operation state, so it should not be in continuous overload operation for a long time.