What are the functions of relay protection equipment
A protective relay is an electrical device designed to detect abnormal conditions, such as short circuits or overloads in power systems. It automatically triggers circuit breakers to isolate the faulty section, protecting equipment and ensuring safety. Protective relays and devices have been developed over 100 years ago to provide "lastline"of defense for the electrical systems. They are intended to quickly identify a fault and isolate it so the balance of the system continue to run under normal conditions. It functions as a watchdog by constantly surveying multiple system components including voltage, current, frequency, and phase angle.
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