Answer / gunasekaran

VCB using for high voltage switching ACB for low voltage
switching

Answer / rites

Breakers are designed for various breaking capacity which
in turn is related to arc quenching media.

VCB - vaccum is the arc quenching media and hence can break
high current high voltage supply and hence used in medium
voltage 11/22kv.

ACB - Air is the quenching media and hence used in LT side
i.e 415 v circuits.

is the secondary voltage of current transformer greater than primary voltage,,,,,,,,] give the example with ct burden,current ratio,and primary and secondary side voltage?

2 Answers  

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what are the safety measure & controls in engine?

2 Answers   RRB,

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How does a clampmeter measures dc current

1 Answers  

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Based on CPI/CGPA they shortlist the candidates & than directly start Interview so there is no Written Exam or GD Only PI.Interview held @ MNNIT , ALLAHABAD On-Campus on 6th,Aug, 2007 & the Questions asked to me by Interview Board ( 4 People) are from HR/SummerTraining/BTP/Subject-core, POWER SYSTEM & MACHINE. time duration of I/V is about 15-20 Minutes. HR- Q.1 Name,hobbies & About family background ? Q2.What u know abt NTPC ?? Q3.Why u want to choose NTPC as ur Carrier's starting i.e power sector not any other Oragnisation or sector ?? Techincal Questions- Q1.What is the reason for transformer Noise ?? Q2.Which material is used for making Transformer oil & How u measure its dielectric strength & Name the test ? Q.3 Which Machine u will prefer 2 use if flammble gases are coming out at a place & why ?? Q4.What is relation b/w Transmission Lines & Communication Lines ? Q5.What is the maximum capacity Synchronus Machine & total powerGeneration in our country ? Q.6 In india Power generation is at 50Hz while in America its 60 hz ,why so ?? Advantage or disadvantage ?? Q.7 Maximum Generation Voltage in india ? Q8. What is the Voltage regulation & why its required n how much is permissible ? & causes of voltage variation ?? Q.9 Why electric shock is feel ?? n in a Electric Train why we didnt feel that ? Q.10 Have u seen/ experience of any power plant/ industry related to the power sector ? so these are the questions which not too diffcult i think was asked to me.

6 Answers   NTPC,

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You required 5A from the transformer but you get 8A. How do you minimize this?

2 Answers   Bajaj, Siemens,

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what is cogging and crawling

2 Answers  

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how to decide the capacity of accl

0 Answers  

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why m and c are shorted in wattmeter

1 Answers  

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what is different the DOL Starter and Star Delta STARTER

12 Answers   Schwing Stetter,

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Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

0 Answers  

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what is the difference between earth and neutral?

1 Answers  

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How to convert 2 phase to 3 phase electricpower in induction moter?

0 Answers   HCL,

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