What is an under frequency relay?
|
|
0
|
522
|
January 19, 2018
|
What are the various faults to which a turbo alternator is likely to be subjected?
|
|
0
|
1556
|
January 19, 2018
|
What is the need of relay coordination?
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|
0
|
530
|
January 19, 2018
|
What is biased differential bus zone reduction?
|
|
0
|
2039
|
January 19, 2018
|
Applications of differential relay
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|
0
|
394
|
January 19, 2018
|
What are over and under current relays?
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|
0
|
2804
|
January 19, 2018
|
Define resetting time of a relay
|
|
0
|
1955
|
January 19, 2018
|
Define operating time of a relay
|
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0
|
1640
|
January 19, 2018
|
Define energizing quantity
|
|
0
|
1281
|
January 19, 2018
|
Different types of over current relays
|
|
0
|
394
|
January 19, 2018
|
What is back up protection?
|
|
0
|
363
|
January 19, 2018
|
What are unit system and non unit system?
|
|
0
|
2479
|
January 19, 2018
|
Define protected zone
|
|
0
|
537
|
January 19, 2018
|
Give the consequences of short circuit
|
|
0
|
787
|
January 19, 2018
|
What are the functions of protective relays
|
|
0
|
401
|
January 19, 2018
|
What is meant by motors in synchronous tie?
|
|
0
|
654
|
January 19, 2018
|
What is a slip resistance?
|
|
0
|
689
|
January 19, 2018
|
Advantage of a liquid resistance for starting purposes
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|
0
|
442
|
January 19, 2018
|
What is liquid resistance?
|
|
0
|
572
|
January 19, 2018
|
How is speed control of a slip-ring motor effected?
|
|
0
|
676
|
January 19, 2018
|
What are the essentials of a full-automatic stator-rotor starter?
|
|
0
|
1067
|
January 19, 2018
|
What is the usual arrangement of connections for a hand-operated slip-ring starter?
|
|
0
|
546
|
January 19, 2018
|
How are slip-ring motors started?
|
|
0
|
525
|
January 19, 2018
|
What is sequence starting?
|
|
0
|
373
|
January 19, 2018
|
What mechanical methods of reducing starting current can be adopted?
|
|
0
|
552
|
January 19, 2018
|
How do the various methods of starting on reduced voltage compare as regards torque per ampere?
|
|
0
|
565
|
January 19, 2018
|
Why are the above values of initial-starting current and torque approximate?
|
|
0
|
316
|
January 19, 2018
|
What are the initial-starting line current and motor torque when star-delta starting?
|
|
0
|
419
|
January 19, 2018
|
When is an auto-transformer starter used?
|
|
0
|
344
|
January 19, 2018
|
When is direct-on-line starting used for three-phase squirrel-cage motors?
|
|
0
|
226
|
January 19, 2018
|