|
What is an under frequency relay?
|
|
0
|
534
|
January 19, 2018
|
|
What are the various faults to which a turbo alternator is likely to be subjected?
|
|
0
|
1582
|
January 19, 2018
|
|
What is the need of relay coordination?
|
|
0
|
540
|
January 19, 2018
|
|
What is biased differential bus zone reduction?
|
|
0
|
2060
|
January 19, 2018
|
|
Applications of differential relay
|
|
0
|
399
|
January 19, 2018
|
|
What are over and under current relays?
|
|
0
|
2853
|
January 19, 2018
|
|
Define resetting time of a relay
|
|
0
|
1979
|
January 19, 2018
|
|
Define operating time of a relay
|
|
0
|
1673
|
January 19, 2018
|
|
Define energizing quantity
|
|
0
|
1297
|
January 19, 2018
|
|
Different types of over current relays
|
|
0
|
398
|
January 19, 2018
|
|
What is back up protection?
|
|
0
|
370
|
January 19, 2018
|
|
What are unit system and non unit system?
|
|
0
|
2534
|
January 19, 2018
|
|
Define protected zone
|
|
0
|
544
|
January 19, 2018
|
|
Give the consequences of short circuit
|
|
0
|
799
|
January 19, 2018
|
|
What are the functions of protective relays
|
|
0
|
412
|
January 19, 2018
|
|
What is meant by motors in synchronous tie?
|
|
0
|
662
|
January 19, 2018
|
|
What is a slip resistance?
|
|
0
|
697
|
January 19, 2018
|
|
Advantage of a liquid resistance for starting purposes
|
|
0
|
449
|
January 19, 2018
|
|
What is liquid resistance?
|
|
0
|
578
|
January 19, 2018
|
|
How is speed control of a slip-ring motor effected?
|
|
0
|
705
|
January 19, 2018
|
|
What are the essentials of a full-automatic stator-rotor starter?
|
|
0
|
1075
|
January 19, 2018
|
|
What is the usual arrangement of connections for a hand-operated slip-ring starter?
|
|
0
|
556
|
January 19, 2018
|
|
How are slip-ring motors started?
|
|
0
|
540
|
January 19, 2018
|
|
What is sequence starting?
|
|
0
|
382
|
January 19, 2018
|
|
What mechanical methods of reducing starting current can be adopted?
|
|
0
|
560
|
January 19, 2018
|
|
How do the various methods of starting on reduced voltage compare as regards torque per ampere?
|
|
0
|
571
|
January 19, 2018
|
|
Why are the above values of initial-starting current and torque approximate?
|
|
0
|
322
|
January 19, 2018
|
|
What are the initial-starting line current and motor torque when star-delta starting?
|
|
0
|
424
|
January 19, 2018
|
|
When is an auto-transformer starter used?
|
|
0
|
351
|
January 19, 2018
|
|
When is direct-on-line starting used for three-phase squirrel-cage motors?
|
|
0
|
232
|
January 19, 2018
|