In electrical power systems, Current Transformers (CTs) and Voltage Transformers (VTs) — collectively known as instrument transformers — play a vital role in both metering and protection. They form the bridge between high-voltage power circuits and low-voltage measuring and protection devices, enabling safe, accurate, and reliable system operation.
Metering in power systems is essential for accurately measuring electricity usage and managing energy distribution. The two main types of metering are High Voltage (HV) metering and Low Voltage (LV) metering. Each type has specific advantages and disadvantages and is suited for different applications depending on accuracy, cost, and customer type.