ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3153)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3306)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13478)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2395)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (424)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (166)
 Instrumentation interview questions  Instrumentation Interview Questions (2408)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (109)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (81)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1205)
Question
1. Why a DC motor starter is called 3 point starter
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
DC motor starter is called 3 point starter bcoz only 3
terminal (L,A,F)are available from starter.These 3 terminal
L(line),A(armature),F(field) must b connected to supply
terminal,motar armatuer terminal,and shunt field terminal.
 
Is This Answer Correct ?    302 Yes 25 No
Simpal
 
Answer
# 2
Beacuse this 3 point starter has three points to save the
motor.
1) over load protection
2) no volt protection
3) starting huge currect protection
 
Is This Answer Correct ?    222 Yes 96 No
Ravi693
 
 
 
Answer
# 3
Actually Dc motor starter are classified as two point
starter,three point starter and four point starter.
Three point starter is used in case of Shunt motor(some
cases this can be used compound motor also)
Four point starter is mainly used in compound motor.
Two point starter is used in series motor in order to make
the motor to run in safe manner.
Three points denotes Line terminal.field terminal and
armature terminal in which three points are connected.
three points L,A F.
that is the main reason
 
Is This Answer Correct ?    141 Yes 22 No
C.balakrishna Moorthy
 
Answer
# 4
In an dc motor have 1.armature
2.field
3.supply
in an 3point starter have 3point(L A F ),
it limits starting armeture current.because armeture is
very low resistence.


that way adding resistace series with the armature 3 point
starter should be used.
 
Is This Answer Correct ?    101 Yes 14 No
Nagaraju .n
 
Answer
# 5
the main purpose of using a three point starter is
to limit the starting armature current.......
This is because dc motor the initial voltage difference is
less so high current passes through the armature windings
which is not a desired factor.When we use a 3 point starter
it slowly induces the back emf in motor so that the voltage
difference is less and rate of current flow is less, so the
motor doesnt get spoiled
 
Is This Answer Correct ?    79 Yes 22 No
Siddarth.m
 
Answer
# 6
because it has three terminals i.e;'l' 'f' 'a'
'l' is connected to supply
'f' is connected to feild circuit
'a' is connected to armature
 
Is This Answer Correct ?    34 Yes 6 No
Saila Sandeep
 
Answer
# 7
a three point starter is onely usst four three point
(l,f,a) line,field,armature. so itis called as three point
starter
 
Is This Answer Correct ?    39 Yes 13 No
Srithar
 
Answer
# 8
because it has three terminals line,field,armature.these
three terminals are connected to their respective ones in a
motor.
 
Is This Answer Correct ?    32 Yes 11 No
Karthick
 
Answer
# 9
dc motor starter is called 3 point starter it has three
terminal (L A F)(LINE,ARMATURE,FIELD) IT USED INSHUNT
MOTOR
 
Is This Answer Correct ?    31 Yes 14 No
Rajeshwar Kumar
 
Answer
# 10
Because they have three terminals namely line field and
armature. they are connected with the motor respectively,
 
Is This Answer Correct ?    27 Yes 11 No
Sundar
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what is the formula to calculate kva genset required for a given load in kw.   3
Why we does earthing for transformer neutral point DLF 5
what is the effect of power factor on DG supply,i mean to say what will the effect if we add capactors on dg supply. HCL 3
Why restricted earth fault protection is needed? Why canít differential Protection is sufficient?   2
why after termination of HT cable armoured earth connected one end, why not connect other end.pls tell me correct answer.   3
What is High Frequency Grounding???? Emerson 2
how to improve IR value in HT motors? ABB 3
If we have 15000kw connected load in a factory than how much power demand sanction should be taken from electricity board. Pls provide complete calculation.   3
why generator and t/f ratings given in kva & motor rating is in KW?   6
why does spark appears when we swith on the light   1
What is d diff. btw MCB & MCCB??? Emerson 1
What should be the minimum and maximum ohmic value for earthing?   1
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright © 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com