What condition is likely to indicate shorted turns in a transformer winding?

A transformer with shorted turns in its winding typically experiences an increase in temperature during normal operation. This is because the shorted turns create a situation where the electrical current can flow in an unintended path, leading to higher resistive losses and excess heat generation. As the transformer operates, the resulting increased current through the faulty turns creates more heat than the design can handle, indicating potential overheating.

While excessive noise and low output voltage can arise from various transformer issues, they are not definitive indicators of shorted turns. Excessive noise might relate to mechanical vibrations or problems with the core, while a low output voltage could stem from several reasons, such as an overloaded transformer or poor connections. Similarly, although a strong magnetic field can occur in transformers, it isn't a clear sign of shorted turns because normal operation can also produce substantial magnetic fields. Thus, increased heating during operation is the most direct and telling symptom of shorted turns in transformer windings.