Introduction：

    In modern electrical protection systems, ensuring the safety and stability of electrical grids and equipment is paramount. One of the essential components of these systems is the relay—a device designed to detect faults and trigger circuit breakers to disconnect faulty parts from the system. Within the context of electrical protection, Relay Comparison is a crucial method used to enhance the accuracy, reliability, and efficiency of fault detection and isolation. This article explores the concept of relay comparison, its role in electrical engineering, and how it contributes to the overall safety of power systems.