|
What is an under frequency relay?
|
|
0
|
532
|
January 19, 2018
|
|
What are the various faults to which a turbo alternator is likely to be subjected?
|
|
0
|
1579
|
January 19, 2018
|
|
What is the need of relay coordination?
|
|
0
|
539
|
January 19, 2018
|
|
What is biased differential bus zone reduction?
|
|
0
|
2058
|
January 19, 2018
|
|
Applications of differential relay
|
|
0
|
396
|
January 19, 2018
|
|
What are over and under current relays?
|
|
0
|
2843
|
January 19, 2018
|
|
Define resetting time of a relay
|
|
0
|
1972
|
January 19, 2018
|
|
Define operating time of a relay
|
|
0
|
1667
|
January 19, 2018
|
|
Define energizing quantity
|
|
0
|
1294
|
January 19, 2018
|
|
Different types of over current relays
|
|
0
|
397
|
January 19, 2018
|
|
What is back up protection?
|
|
0
|
369
|
January 19, 2018
|
|
What are unit system and non unit system?
|
|
0
|
2527
|
January 19, 2018
|
|
Define protected zone
|
|
0
|
542
|
January 19, 2018
|
|
Give the consequences of short circuit
|
|
0
|
797
|
January 19, 2018
|
|
What are the functions of protective relays
|
|
0
|
410
|
January 19, 2018
|
|
What is meant by motors in synchronous tie?
|
|
0
|
660
|
January 19, 2018
|
|
What is a slip resistance?
|
|
0
|
696
|
January 19, 2018
|
|
Advantage of a liquid resistance for starting purposes
|
|
0
|
447
|
January 19, 2018
|
|
What is liquid resistance?
|
|
0
|
575
|
January 19, 2018
|
|
How is speed control of a slip-ring motor effected?
|
|
0
|
701
|
January 19, 2018
|
|
What are the essentials of a full-automatic stator-rotor starter?
|
|
0
|
1073
|
January 19, 2018
|
|
What is the usual arrangement of connections for a hand-operated slip-ring starter?
|
|
0
|
553
|
January 19, 2018
|
|
How are slip-ring motors started?
|
|
0
|
538
|
January 19, 2018
|
|
What is sequence starting?
|
|
0
|
382
|
January 19, 2018
|
|
What mechanical methods of reducing starting current can be adopted?
|
|
0
|
557
|
January 19, 2018
|
|
How do the various methods of starting on reduced voltage compare as regards torque per ampere?
|
|
0
|
569
|
January 19, 2018
|
|
Why are the above values of initial-starting current and torque approximate?
|
|
0
|
321
|
January 19, 2018
|
|
What are the initial-starting line current and motor torque when star-delta starting?
|
|
0
|
422
|
January 19, 2018
|
|
When is an auto-transformer starter used?
|
|
0
|
349
|
January 19, 2018
|
|
When is direct-on-line starting used for three-phase squirrel-cage motors?
|
|
0
|
230
|
January 19, 2018
|