In a potential transformer, the voltage across the secondary terminals is always _____.

In a potential transformer, the function is to step down voltage levels for measurement and protection purposes. By design, the secondary voltage is much lower than the primary voltage to facilitate safe and manageable readings. The potential transformer operates on the principle of electromagnetic induction, where a high input (primary) voltage is transformed into a lower output (secondary) voltage based on the turns ratio of the transformer.

This relationship is a fundamental characteristic of potential transformers: they are specifically intended to produce a secondary voltage that is proportionately reduced compared to the primary voltage. Therefore, in typical applications, the secondary voltage remains lower than the primary voltage. This ensures that the secondary side can interface safely with measurement devices, which are designed to operate at these lower voltage levels.

Recognizing the purpose and operation of potential transformers clarifies why the secondary voltage is consistently lower than the primary voltage, aligning with industry standards and practices for voltage transformation in electrical systems.