What is the commonly acceptable explanation for potential transformers?

Potential transformers play a crucial role in the accurate measurement of high voltages in electrical systems, particularly in industrial settings. Their primary function is to step down high voltages to a safer, manageable level that can be measured by standard metering equipment. This process ensures that the voltage readings used for billing are precise, which is essential for both utility companies and industrial customers that consume large amounts of electricity.

In industrial applications, where accurate voltage levels are critical for system stability and financial accountability, potential transformers allow for trustworthy electric metering, which directly influences billing. By providing accurate measurements of the voltage supplied, potential transformers help ensure that customers are billed correctly based on their actual power consumption.

The other choices reflect misunderstandings about the usage and importance of potential transformers. They are not a technology limited to residential customers, nor are they considered outdated; in fact, they continue to be an integral part of modern electrical systems. Additionally, their necessity for accurate voltage readings cannot be understated, contradicting the idea that they are not required for accurate voltages.