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 meant by boost charge in batteries

1 Answers   MTS,

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What is stepper motor?

0 Answers  

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Explain in brief description about the operation of DG sets.

0 Answers   Siemens,

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DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.

0 Answers   Greenko Group,

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In a single phase converter, the no. of SCR conducting during overlap? a.1 b.2 c. 3 d. 4

3 Answers  

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what happens when you connect a.c and d.c supplies

1 Answers  

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What is the concept of voltage & current its relation?

5 Answers  

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what is the purpose of using filters in a protective relaying scheme?

0 Answers  

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Why the CT Secondary is rated as 5A generally?

2 Answers  

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Explain how you intend to work under pressure to meet up with deadline target?

0 Answers  

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in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com

0 Answers  

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DG cranking voltage?

0 Answers  

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