Describe working of protective relays. What are important functional requirement of relays?

Protective relays are crucial components in electrical power systems that detect abnormal conditions and initiate the disconnection of faulty equipment to prevent damage. They operate by continuously monitoring electrical parameters such as voltage, current, frequency, and phase angle. When these parameters exceed predetermined limits, the relay sends a signal to the circuit breaker, instructing it to isolate the affected section. This rapid response helps in preventing damage to equipment, reducing downtime, and ensuring safety.

Working of Protective Relays

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