Analysis of Cooling Mode of Dry - Type Transformer

substations and transformers cooling method is divided into natural air cooling (AN) and forced air cooling (AF). Natural air cooling, the transformer can be rated capacity under long-term continuous operation. Forced air cooling, the transformer output capacity can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation. The load loss and impedance voltage increase greatly due to overload, and it is in non-economic running state. Therefore, it should not be put into continuous overload operation for a long time.