What is the primary purpose of Potential Transformers and Current Transformers?

The primary purpose of Potential Transformers (PTs) and Current Transformers (CTs) is to convert high voltage and high current values to lower, more manageable levels that can be safely processed by monitoring and protective devices such as relays. This conversion allows for accurate measurements and protection systems to function effectively.

PTs reduce high voltages to a standardized lower voltage, while CTs decrease high currents to lower current levels. By providing reduced values, PTs and CTs ensure that relays and other monitoring equipment can operate without exposing them to damaging levels of electricity. This enables effective monitoring, metering, and protection in electrical systems, contributing significantly to operational safety and reliability.

In contrast, the other options do not accurately reflect the fundamental role of PTs and CTs within power systems. While measuring potential energy and stepping up power flow touch on aspects of electrical engineering, they do not align with the primary function of these transformers. Moreover, monitoring safety is not their direct primary purpose; rather, they are critical tools that contribute to safety by ensuring that equipment can handle high voltage and current safely through proper conversion.