Power Systems Which of the following relays is/are unit protection relays? Buccholz relays both 1 and 2 Differential relays over current relays Buccholz relays both 1 and 2 Differential relays over current relays ANSWER DOWNLOAD EXAMIANS APP
Power Systems Differential relays does not used for which of the following faults? faults within a transformer through faults faults within a generator both 1 and 2 faults within a transformer through faults faults within a generator both 1 and 2 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-delta star-star delta-star star-delta delta-delta star-star delta-star star-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? 15% 11.8% 85% 88.2% 15% 11.8% 85% 88.2% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following faults is/are treated as external faults? Over voltage Failure of excitation All of these Failure of prime mover of the generator Over voltage Failure of excitation All of these Failure of prime mover of the generator ANSWER DOWNLOAD EXAMIANS APP
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