|
How do built-in thermal overload protectors work?
|
|
0
|
301
|
January 19, 2018
|
|
How are built in thermal overload protector arranged?
|
|
0
|
592
|
January 19, 2018
|
|
What are the alternatives to the use of overload releases?
|
|
0
|
226
|
January 19, 2018
|
|
What special protection can be provided against single-phasing?
|
|
0
|
234
|
January 19, 2018
|
|
Will normal overload relays trip on single-phasing?
|
|
0
|
226
|
January 19, 2018
|
|
What happens when one of the three lines supplying a three-phase induction motor becomes open-circuited?
|
|
0
|
459
|
January 19, 2018
|
|
How many overload relays are required in the control gear?
|
|
0
|
216
|
January 19, 2018
|
|
How does the magnetic overload relay operate?
|
|
0
|
230
|
January 19, 2018
|
|
How thermal relays work?
|
|
0
|
254
|
January 19, 2018
|
|
What are the usual forms of overload relay in motor-control gear?
|
|
0
|
217
|
January 19, 2018
|
|
What provision must be made for short-circuit conditions in motor circuits?
|
|
0
|
358
|
January 19, 2018
|
|
What devices are required to give adequate protection to the motor?
|
|
0
|
337
|
January 19, 2018
|
|
What are the main functions of control gear?
|
|
0
|
432
|
January 19, 2018
|
|
For an Resistive Load and Inductive load considered for switching operation of circuit breaker, Switching of which load is difficult and Why?
|
|
0
|
247
|
January 19, 2018
|
|
What is re-striking voltage?
|
|
0
|
435
|
January 19, 2018
|
|
When does an arc extincts?
|
|
0
|
320
|
January 19, 2018
|
|
What is recovery voltage in circuit breaker?
|
|
0
|
295
|
January 19, 2018
|
|
Why asymmetrical breaking current is higher than the symmetrical breaking current in a circuit breaker?
|
|
0
|
889
|
January 19, 2018
|
|
Why Isolation switches are provided along with the circuit breakers?
|
|
0
|
230
|
January 19, 2018
|
|
What is meant by Current Chopping?
|
|
0
|
464
|
January 19, 2018
|
|
What are the some precautions must be taken when using a booster transformer?
|
|
0
|
580
|
January 19, 2018
|
|
Why excitation control is not possible beyond certain limits?
|
|
0
|
268
|
January 19, 2018
|
|
Why it is necessary to keep the receiving end voltage constant within specified limits?
|
|
0
|
418
|
January 19, 2018
|
|
What is a booster transformer?
|
|
0
|
286
|
January 19, 2018
|
|
Different methods of controlling voltage in an ac supply system?
|
|
0
|
254
|
January 19, 2018
|
|
How the Voltage Control in power system is achieved?
|
|
0
|
279
|
January 19, 2018
|
|
Purpose of Circuit Breakers
|
|
0
|
270
|
January 19, 2018
|
|
For EHV applications which type of circuit breaker is mostly preferred?
|
|
0
|
493
|
January 19, 2018
|
|
Why current chopping considered as serious drawback in a circuit breaker?
|
|
0
|
619
|
January 19, 2018
|
|
Materials used for the contacts of vacuum circuit breakers?
|
|
0
|
257
|
January 19, 2018
|