Protection relays are tested by sending simulated electrical signals that mimic real fault conditions. A relay module is an electrically operated switch that plays a critical role in controlling high-power circuits using low-power signals., microcontrollers or sensors) and heavy-load devices (e. When a fault is detected, the relay sends a signal to circuit breakers to isolate the faulty section, preventing damage to equipment and minimizing. Settings verification, also known as relay testing or commissioning, is a process used to validate and confirm that the relay protection settings meet the desired requirements.