Which condition is NOT a typical function of a potential transformer?

The correct answer is that voltage polarity checking is not a typical function of a potential transformer.

Potential transformers are primarily used to step down high voltage levels to lower levels suitable for measurement and monitoring. Their main functions include voltage scaling, which allows for accurate readings and control of high-voltage systems. They also play a role in signal conditioning, which involves processing the transformed lower voltage signals for analysis, ensuring that the output is compatible with measuring instruments.

On the other hand, voltage polarity checking, while important in electrical systems, is generally not a function associated with potential transformers. Instead, it's typically handled by other devices or methods designed specifically for ensuring correct polarity, such as phase sequence indicators or polarity testers. Potential transformers focus more on voltage transformation and providing a scaled signal rather than checking the orientation or polarity of the voltage.