Answer / k.prakashchandra

Accuracy Class 0.2 or 0.5 is not possible with CVT

how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

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How the surge voltage can be arrested in electronic devices

1 Answers  

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When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

2 Answers  

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3.The slip of an IM UNDER FL condition is about.....

1 Answers   SSC,

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in 11kv generators the neutral point is connected to earth via earth coil while in the 33 / 11 kv transformer the neutral point is connected to earth via earth resistor why? 

1 Answers  

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WHY KVAR IMPORTANT WHEN ANY PLANT IS RUNNING ON IT'S OWN POWER PLANT?

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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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why neutral busbar size is half of the phase busbar size in control panels

1 Answers   IBS,

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how to select cable size for three phase?

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Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

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HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????

0 Answers   General Electric,

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What are the different types of dams?

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