What do instrument transformers primarily measure in a power system?

Instrument transformers are crucial components in power systems, specifically designed to reduce high voltages and currents to manageable levels for measurement and monitoring purposes. They primarily measure voltage and current, allowing for safe and accurate readings of these critical parameters in an electrical system.

These transformers come in two main types: potential transformers (VTs) for measuring voltage and current transformers (CTs) for measuring current. By stepping down high voltage levels and isolating circuits, instrument transformers make it possible for metering devices to operate without being directly exposed to the high voltage or current levels present in the system.

The ability to accurately measure voltage and current through these transformers enables reliable monitoring and management of the electrical grid, ensuring that the system operates within safe limits and that any anomalies can be detected promptly. As a result, the choice indicating that instrument transformers primarily measure voltage and current correctly identifies their main function within power systems.