Answer / aravind

the reason for using carbon brushes is it has resistance which is good enough for avoiding sparking during commutaion.This feature is also present in copper but frequently carbon is used

Answer / niranjan reddy

because the carbon is of less cost. and as frequent wear and
tear will occur to the brush due to rotation of the
motor...carbon is most economical.
and frm conduction point of view also it is good..so carbon
is used

What is C.T, why it is used and what care should be taken for that while connecting?

20 Answers   Bhushan Power Steel,

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what is the different between second harmonics and third harmonics ?

1 Answers  

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what is the use of Reactive power

2 Answers  

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Starting Time of LT & HT Motor

0 Answers  

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explain remenance . differentiate high remenance type ct & low remenance type ct

0 Answers   Coca Cola,

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an electric bulb is connected on a holder. one end of the wire is connected to the phase and the remaining one connected to earth instead of neutral. the bulb will glow or not? if yes then what is the need of neutral?

7 Answers  

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What are the advantages of individual drives?

1 Answers   A1 Electricals, Suzlon,

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what is wave trap? please explain the working and principle

4 Answers  

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is starting current of induction is high or stating current of ransformor is hign ,for the same rating

12 Answers   BARC,

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I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to give the contactor coil. How i can select control transformer, Which rating transformer i can use this panel, what is the procedure, please tell me.

2 Answers  

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Show Details FROM:Muhammed Ikram TO:qa@allinterview.com Message flagged Saturday, June 4, 2011 10:07 PMMessage bodyHello all, i want to ask a question to all of you that what is VMM (voltage monitoring module )? how it work,s? i heard somewhere that it compare 1 phase voltage to other phase voltage. but there is also some setting on it. how to set it,s setting. please tell me briefly. Thank,s and Regard,s. Muhammed Ikram.

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why bucholtz relay placed inclined in transformer?

1 Answers  

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