What is a primary consequence of a fault in the secondary coil of a transformer?

In the context of transformer operation, a fault in the secondary coil can lead to a complete loss of coupling action between the primary and secondary circuits. This happens because transformers rely on magnetic coupling to transfer energy from the primary coil, energized by an alternating current, to the secondary coil. If there is a fault, such as a short circuit or an open circuit in the secondary, the magnetic field that typically links the two coils can be disrupted or entirely lost.

When the coupling action is compromised, the transformer can no longer effectively transfer energy, which may lead to variations in voltage and current, or even complete failure to deliver power from the primary to secondary. Understanding this consequence is critical for diagnosing issues in transformer operation and maintaining system integrity within electronic and electrical systems in aviation applications.