Power Systems Which of the following relays is/are unit protection relays? Buccholz relays Differential relays over current relays both 1 and 2 Buccholz relays Differential relays over current relays both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Differential relays does not used for which of the following faults? faults within a generator through faults both 1 and 2 faults within a transformer faults within a generator through faults both 1 and 2 faults within a transformer ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which type of connection is employed for current transformers for the protection of delta- star connected 3-phase transformer? delta-star star-star star-delta delta-delta delta-star star-star star-delta delta-delta ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 88.2% 15% 85% 11.8% 88.2% 15% 85% 11.8% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following faults is/are treated as external faults? Over voltage Failure of excitation Failure of prime mover of the generator All of these Over voltage Failure of excitation Failure of prime mover of the generator All of these ANSWER DOWNLOAD EXAMIANS APP
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