Electrical Engineering Interview Questions
Questions Answers Views Company eMail

difference between ground,neutral and earth?..

4 3984

what is the difference between switch yard to residential area.and how much required it.

GVK,

1245

Tan delta point in transformer to be earth or not?

DMRC,

1 3644

I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.

College School Exams Tests,

1264

what is difference between VAT & CST

MIT,

1 2345

Why reactors use before incoming of ac vvfd drive?

1336

how to calculate cable size

1 4786

what is megar testing

NASA,

4 13898

After completing iti in electrician, how can i get certificate of electrical supervisor? What ia requirements. For it?

1243

In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

Saint Gobain,

1676

How the value of KVAR of capacitor bank used in switchgears calculated??

2 2915

what is linear elements

1 2057

A LT ckt i mean 440 volt flow of current100A.at this time HT current what will ON 11 KV &33 KV.plz givemy answer with example

Neptune,

2 2520

how wecalculate breaking capcity of acb mcb mccb .explain with example

C&S, L&T,

1372

What is tan delta point of transformer?

2 3270


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Un-Answered Questions { Electrical Engineering }

What is the form name of 'c' license, I want to download in web

1385


What is the relation between frequency and motor rpm?

1313


What is Auto Mains Failure Panel & Auto Synchronizing Panel

1421


calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

3040


What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

2033






what is current check gurd relay?

1998


What should be the height of basement according to NBCC code?

1697


what is JE exam?

1661


what are the different methods for the starting of a synchronous motor.

617


describe the phenomena of vacuum interruption in C.B

1229


how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....

1551


what curve and rateing would you use for a three phase 0.75kw motor?

1543


Control cables in S's will carry 1000v which is AC R DC? Pls answer me 

1579


If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?

1662


Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

1201