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? through faults faults within a transformer both 1 and 2 faults within a generator through faults faults within a transformer both 1 and 2 faults within a generator 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-delta star-star delta-star delta-delta star-delta star-star delta-star 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? 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 Over voltage Failure of excitation ANSWER DOWNLOAD EXAMIANS APP
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