modi jaimin


{ City } ahmedabad
< Country > india
* Profession * g.e.t
User No # 56896
Total Questions Posted # 3
Total Answers Posted # 8

Total Answers Posted for My Questions # 4
Total Views for My Questions # 25107

Users Marked my Answers as Correct # 75
Users Marked my Answers as Wrong # 17
Questions / { modi jaimin }
Questions Answers Category Views Company eMail

What is The function of tvm(tri-vector meter)??

2 Electrical Engineering 19741

If my sfu is 64 Amp & its link is 32 Amp then at what amp.my sfu will trip???

2 Electrical Engineering 3926

Can any one know what are the symbols at the down (below) the analog ammeter??? there are 4 symbols which are they ?????

Electrical Engineering 1440




Answers / { modi jaimin }

Question { Infosys, 105221 }

Whats meant by trivector meter where it is connected at the
substation?


Answer

i am not giving answer here.But i want to ask Mr.Shanker
Malagamma that can u explain me what is the meaning of this
import export facility..??????plz explain if any one others
also know about that?????thanking you

Is This Answer Correct ?    2 Yes 2 No

Question { Hindustan Shipyard, 24153 }

Why a single-phase induction motor not an inherently
self-starting machine?


Answer

in 1 phase i.m the stator is distributed wdg. & squirrel
cage rotor.When it is fed from 1 phase supply the sator
wdg. produces flux which is alternating i.e. alternates
along one space axis only.it is not synchronously revolving
flux as in case of 2 or 3 phase wdg.fed from 2 or 3 phase
supply.this pulsating flux acting on stationary squirrel
cage rotor can not produce rotation(remember:only revolving
flux can)so....it made self start by means of capacitor
with 90 phase split.ok.bye

Is This Answer Correct ?    13 Yes 8 No


Question { DVC, 6548 }

how speed control of induction motor?


Answer

1.control from stator side
a.by changing applied voltage
b.by changing stator no. of poles
c.by changing applied frequency

2.control from rotor side
a.by rotor rheostate
b.by cascade operation
c.by injecting emf in rotor ckt.

Is This Answer Correct ?    7 Yes 0 No

Question { 5796 }

What are the possible causes of REF operation on a power
transformer


Answer

actually i dont know the answer but i wanted to know what
is the REF operation of power x'mer...plz explain in detail

Is This Answer Correct ?    1 Yes 1 No

Question { 7568 }

what is sf6 where it is use & working or function ?


Answer

my answer for ibrahim que is that sulfur(sf) hexafloride
(6)......thats way it is sf6 cb.....the answer of main
question is well explain by pavan

Is This Answer Correct ?    1 Yes 3 No

Question { 12000 }

what is the general Classification of Generators


Answer

basically there are two types of generator:dc generator &
ac generator

ac generator are called alternator
dc generator are:
1.seperatly exicited
2.self exicited
a.series wound
b.shunt wound
c.compound wound in this catagory again 1.long shunt
2.short shunt

Is This Answer Correct ?    31 Yes 1 No

Question { 6076 }

Can we step up a 230V supply to 400V using a single phase
transformer??


Answer

ya u are definataly step up 230v to 400v using 1
phase.....3 phase x'mer only used for step up or step down
the 3 phase voltage or current.ok...

Is This Answer Correct ?    11 Yes 2 No

Question { BARC, 6793 }

how to find out speed of single phase motor


Answer

The same way as 3 phase induction motor...
if the slip of the rotor is s w.r.t forward rotating flux
i.e. the one which rotates same as rotor so
N=Ns(1-s)
where n is actual speed
Ns is the synchronous speed

Is This Answer Correct ?    9 Yes 0 No