Relays are critical components in both electrical power systems and electronic circuits, playing a pivotal role in ensuring safety and efficiency. They detect faults or abnormal conditions and initiate corrective actions, such as disconnecting circuits or triggering alarms. To maximize the performance of these systems, it is essential to understand relay parameters, as they define how relays respond to various electrical conditions. This article delves into the core parameters of relays, their significance, and their role in system protection.