What main characteristic indicates that a winding-resistance test was performed correctly on a transformer?

The main characteristic indicating that a winding-resistance test was performed correctly on a transformer is that the resistance values should fall within a specific range. This range is determined based on the manufacturer's specifications and the nominal values for the transformer's design. Resistance values that align with these specifications suggest that the windings are functioning properly, with no significant issues such as short circuits, open circuits, or excessive heating.

If the resistance values are significantly higher or lower than expected, it can indicate potential problems such as excessive moisture, insulation degradation, or even winding damage. Therefore, confirming that the resistance values fall within the proper range ensures that the test results are valid and that the transformer is in good working condition. Other factors may be important in assessing the complete performance of the transformer, but adherence to the specified resistance range is crucial for confirming the winding's integrity and operational reliability.