What should an OLTC motor do once the tap is raised to the highest level and continues to receive a raise signal?

An On-Load Tap Changer (OLTC) motor is designed to control the voltage in a transformer by adjusting the tap connections during operation. When the tap is raised to the highest level and continues to receive a raise signal, the motor should stop and remain at the highest raised position. This behavior is crucial for both the operational safety of the transformer and the integrity of the electrical system.

The motor stopping and maintaining the raised level prevents damage that could occur from attempting to raise the tap further than its maximum limit. This stopping mechanism ensures that the transformer operates within safe parameters, avoiding issues such as mechanical strain or failure caused by the motor or gears being over-driven. It also maintains system stability, ensuring the voltage remains within acceptable ranges to protect connected equipment.

In summary, the appropriate action is for the motor to stop and stay at the raised level, enabling safe and effective voltage management without risking over-extension or damage to the components involved.