What is the function of PTs in electrical systems?

The function of Potential Transformers (PTs) in electrical systems is primarily to transform high voltage to a reduced level, typically around 120V, making it safe and manageable for measurement and instrumentation purposes. This reduction in voltage allows operators to monitor and analyze voltage levels without exposing them to potentially hazardous high voltages. The reduced voltage output can be used for metering, protection relays, and various control devices, ensuring that accurate readings can be obtained while maintaining a safe working environment.

This transformation is crucial in the electrical grid, as it facilitates the use of standard measuring equipment designed to operate at lower voltages. By using PTs, utility companies can accurately monitor and control high-voltage electricity while ensuring the safety of their personnel.