Reza Hasanzadeh - Khorasan Regional Electric Company, Mashhad

The article explores the pivotal roles of Current Transformers (CTs) and Potential Transformers (PTs) in high-voltage (HV) substations, emphasizing their critical contributions to system protection and metering. It delves into various CT and PT types, installation and maintenance guidelines, and recent technological advancements. Accurate current measurements from CTs are crucial for protective relays, while PTs play a vital role in providing reduced voltage for precise measurement and control. The article anticipates future trends, including increased integration with digital systems and the potential influence of wireless communication and the Internet of Things (IoT) in remote monitoring. Overall, the accurate and reliable performance of CTs and PTs is deemed essential for the safe and efficient operation of power systems.

Potential Transformers, Current Transformers, HV substations