kumar


{ City } madurai
< Country > india
* Profession * engineer
User No # 32579
Total Questions Posted # 127
Total Answers Posted # 63

Total Answers Posted for My Questions # 462
Total Views for My Questions # 1133060

Users Marked my Answers as Correct # 555
Users Marked my Answers as Wrong # 252
Answers / { kumar }

Question { NTPC, 13883 }

How the electric train gets the supply of electricity? What
is the return path of the current?


Answer

actually input supply is AC .the return path is provided in
track by using rectifier Ac converted into DC & its fed to
Input supply of DC series motor so electric train is run
by dc series motor .

Is This Answer Correct ?    39 Yes 5 No

Question { 5852 }

What are the types of relay ?


Answer

mr thowsif .i already get the above answer in
wikipedia .but i think this is not proper answer thats y i
submitted this question any other answer please
forword ,thank u

Is This Answer Correct ?    1 Yes 2 No


Question { 4627 }

In zero voltage we can pass supply to our body means we
cant get shock its true ? how we can do it ?


Answer

Mr.Anil thanks I can get your answer .but how we can get
it .please explain .thank u

Is This Answer Correct ?    0 Yes 0 No

Question { 4637 }

when we catch any one of the phases with our both hands in
air(without touching ground),our body acts as a
conductor.is it correct.please clarrify it.


Answer

no the circuit is not closed here so we don't get shock but
if you touch two phases by our hand in air means we feel
shock,thank you

Is This Answer Correct ?    7 Yes 1 No

Question { 5370 }

how dg's working of 1000kva.


Answer

Mr.aravind your question is not clear .post clear question

Is This Answer Correct ?    5 Yes 2 No

Question { ABB, 11373 }

What is power factor ?What are the benefits of improved
power factor & how. Please explain with examples.?


Answer

hai mehul how we can improve power factor from 0.8 to 0.85
or 0.9 & its either lag or lead ?please clear me thank you

Is This Answer Correct ?    3 Yes 4 No

Question { 12521 }

how we can improve power factor from 0.8 to 0.85 or 0.9 &
how we identify its either lag or lead ? thank you


Answer

hit dav thanks for posting your answer please can you
explain with example ?

Is This Answer Correct ?    0 Yes 1 No

Question { 12204 }

findout of current?details 440v,3phase,085pf,hp-5


Answer

5.7 amps convert 5hp= kw by 5*.746 = 3.73kw
(kw = v*i*cos*1.732/1000 )

Is This Answer Correct ?    19 Yes 2 No

Question { 16507 }

how we can calculate cable size of 230v,1 hp single phase
motor ? panel to motor distance is 25 meter


Answer

Mr.vaibhav your answer is standard or you find out by using
formula ?

Is This Answer Correct ?    2 Yes 1 No

Question { 11365 }

What is AVR in Generators and How is it working.


Answer

hi iam AVR Service engineer .
AVr is heart og genset .its developing & maintain the
genset voltage as constant .its building voltage by
refernce of voltage produce by genset .for Ex: if genset
rated voltage is 11kv means intially genset produce some
minimum voltage (7- 14v)ac only is called resuidual
voltage .
that voltage is input of AVR .avr developing the
voltage upto rated Kv by some programmable circuit in
AVr .that O/p voltage is DC only its called as Excitation
voltage. we fed the excitation voltage to Excitor in
genset.after genset reached rated KV the AVr continusly
maintain the voltage as constant

Is This Answer Correct ?    17 Yes 0 No

Question { 4202 }

define briefly the function of an ac electric generator
(alternator)?


Answer

generator is converting mechanical energy to electrical
energy .by using prime mover its gives mechanical energy
to Genset (generator).In genset it consist of
stator,rotor,RR & excitor.intially rotor rotating by
mechanical energy its produce some minimum voltage called
resuidual voltage by using AVR (automatic voltage
regulator ) we can develop or buildup the resuidual
volage .its produce DC voltage its called excitation
voltage .that voltage fed to excitor.In excitor that
voltage is fed to rotor through RR (rotating
rectifier ).this process going continusly & that AVR
maintain the voltage as constant .depend upon the Genset
power the excitation voltage will vary.

Is This Answer Correct ?    18 Yes 0 No

Question { 5860 }

Hi friends I am a service engineer in electrical field i
plan to shift design engineer in same field, so i request
your suggestion for what software or course i want to
learn ?


Answer

thank you very much john .can i learn this software in
bangalore or any other place in south india if you have any
idea please guide me ..

Is This Answer Correct ?    0 Yes 0 No

Question { 5860 }

Hi friends I am a service engineer in electrical field i
plan to shift design engineer in same field, so i request
your suggestion for what software or course i want to
learn ?


Answer

thanks for your information john .currently iam working in
ABB (contract) .if you know any ABB design software plz
send it .my id is kumar4486@gmail.com.thank u friend

Is This Answer Correct ?    0 Yes 0 No

Question { 4804 }

hi friends ,iam working as genset AVR service engineer in
electrical field from past 2 yrs throughout india . i plan
to shift in some other job without travelling in same field
because i con't travel,i dont know what i do for that so
please guide me what job is suited for me,how i can serch
the job please anybody helpme iam totally confused


Answer

hi arvind iam BE holder 2007 passout ,my native is
madurai,tamil nadu state but currently iam working in
bangalore .my mail id is kumar4486@yahoo.co.in.thank u

Is This Answer Correct ?    0 Yes 0 No

Question { 11760 }

as per BIS supply voltage in India is ......


Answer

what is BIS ?

Is This Answer Correct ?    3 Yes 2 No

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