The cooling methods for dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). During natural air cooling, the transformer can operate continuously for a long time at rated capacity. When forced air cooling is applied, the output capacity of the transformer can be increased by 50%. Suitable for intermittent overload operation or emergency accident overload operation; Due to the large increase in load loss and impedance voltage during overload, it is in a non economic operation state, so it should not be subjected to long-term continuous overload operation.
2023/03/21
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