What is a relay, its function, types and relay wiring

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SOLVED: 1. Draw the single line diagram of impedance relay protection, state its working principle, and explain its components including CT, PT/VT, Relay, and Circuit Breaker. 2. Explain the difference between an isolator and a circuit breaker. What is the purpose of arc quenching medium in circuit breakers? List different types of circuit breakers based on the arc quenching medium. 3. List various substation equipment and state their purpose/use. 4. Why can't an isolator be switched OF

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