Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 3rd harmonic current. 7th harmonic current. 2nd harmonic current. 5th harmonic current. 3rd harmonic current. 7th harmonic current. 2nd harmonic current. 5th harmonic current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relays is/are unit protection relays? Buccholz relays over current relays Differential relays both 1 and 2 Buccholz relays over current relays Differential relays both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Mho relays are used for the protection of which of the following lines? long transmission lines only short transmission lines only None of these medium transmission lines only long transmission lines only short transmission lines only None of these medium transmission lines only ANSWER DOWNLOAD EXAMIANS APP
Power Systems The most suitable circuit breaker for short line fault without switching resistor is oil circuit breaker. air blast circuit breaker. none of these. SF6 breaker. oil circuit breaker. air blast circuit breaker. none of these. SF6 breaker. ANSWER DOWNLOAD EXAMIANS APP
Power Systems For a 500 Hz frequency excitation, a 100 km long power line will be modelled as medium transmission line shunt capacitor any of the above long transmission line medium transmission line shunt capacitor any of the above long transmission line ANSWER DOWNLOAD EXAMIANS APP
Power Systems Keeping in view the cost and overall effectiveness, the following circuit breaker is suited for capacitor bank switching air blast. SF6. vacuum. oil. air blast. SF6. vacuum. oil. ANSWER DOWNLOAD EXAMIANS APP
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