Is it possible to use potential transformers without current transformers for metering purposes?

Using potential transformers without current transformers for metering purposes is generally not feasible. Potential transformers (PTs) are designed to step down voltage to a level suitable for measurement and protection. However, for accurate metering and load analysis, current information is also essential.

Current transformers (CTs) complement potential transformers by providing the necessary current measurements, which are critical for calculating power consumption, load, and ensuring safety in electrical systems. Metering typically requires both voltage and current readings to determine the overall power usage and to comply with applicable standards. Thus, relying solely on potential transformers would not suffice for comprehensive metering in most scenarios.

In special situations, such as monitoring systems where load currents are negligible or constant, there may be exceptions; however, these scenarios are not standard practice for typical metering requirements. This highlights the need for both PTs and CTs in most metering applications to ensure accurate and reliable data collection.