The primary side of the transformer is energized, and the secondary side does not distribute power, what faults may occur in the transformer?

If the primary side of the transformer is powered, and the secondary/distribution side does not distribute power, even if the fuse is in normal condition, then the following faults may occur in the installed transformer:

1. Winding Failure: The secondary winding may be open, resulting in no voltage output on the secondary side.

2. Wiring Errors: During installation, there may be incorrect connections between the primary and secondary windings.

3. Internal Short Circuit: Although the fuse is normal, there may be a local short circuit inside, causing the secondary side to not work properly.

4. Core Failure: The core may have issues such as looseness or poor insulation, affecting the normal transmission of magnetic flux.

5. Switch or Contactor Failure: The switch or contactor on the secondary side may not be closed or there may be poor contact, preventing power from being distributed.

To accurately diagnose the problem, it is recommended to perform detailed inspections and tests, including measuring the resistance of primary and secondary windings, checking the wiring, testing the condition of the core, and confirming the status of all switches and contactors.