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Question
how we select the mva rating of the circuit breakers?
 Question Submitted By :: Ravi
I also faced this Question!!     Rank Answer Posted By  
 
  Re: how we select the mva rating of the circuit breakers?
Answer
# 1
accordig to the voltage of the system & peak value of fault
current to be interrupted by the breaker
 
Is This Answer Correct ?    5 Yes 0 No
Akhilesh Negi
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what happens when the transformer is connected to DC supply?   4
WHAT IS DIFFERENCEN BETWEEN CURRENT AND VOLTAGE?   5
What is the function of lead sheath?   2
types of motors suitable for escalators with reason   1
How to implement 6 output with 3 input NAND gate?   1
my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.   2
What are the components ofan HT panel in a 11kv power station?   2
What should be the setting of an earth fault relay. HP 2
why is it that the HT motors & motors having very low kW rating(<1kW) have windings connected in STAR, whereas the motors having in between kW ratings have DELTA connected windings??   5
What is Black-out and Brown-out situation in the context of voltage stability in power system?   1
what is vector surge & vector shift? we have 25.3 MW(11kv) generator & 11kv/132kv transformer, connected with with 132 kv grid.vector surge relay is tripping frequentaly.what is permissible maximum limit for this.   2
1.what is meaing of ups,and used in softwares and sud stations,and main partes in ups. 2.main partes of the Disel Genarator. 3.main partes of the chiller and safty equipments.   2
 
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