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 (3118)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3298)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13426)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2384)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (420)
 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 (165)
 Instrumentation interview questions  Instrumentation Interview Questions (2394)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (107)
 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 (78)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1203)
Question
What are the advantages of star-delta starter with 
induction motor?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
1. The main advantage of using the star delta starter is
reduction of current during the starting of the
motor.Starting current is reduced to 3-4 times Of current
of Direcr online starting.

2. Hence the starting current is reduced , the voltage
drops during the starting of motor in systems are reduced.
 
Is This Answer Correct ?    101 Yes 10 No
K.senthil Kumar
 
Answer
# 2
The main advantage of using the star delta starter is
reduction of current during the starting of the
motor.Starting current is reduced to 3-4 times Of current
of Direcr online starting.

Hence the starting current is reduced , the
voltage
drops during the starting of motor in systems are reduced
 
Is This Answer Correct ?    44 Yes 11 No
Sonu Kumar
 
 
 
Answer
# 3
The main adventage of using star-delta starter for
induction motors is as following-
if we start the motor with DOL(direct on line) or simple
starter the the motor requiers more current to start ,
which is 6-8 times the full load current.because the higher
tourqe is require to start the motor...
so in star-delta the motor is started in star, which
produce higher tourqe at lower current, means the starting
current is 4-5 times less than delta starting.
and then motor after start gets full speed and star
contecter is disconnect and motor runs in delta
connections.because torqe is less and lower current is
required.
 
Is This Answer Correct ?    20 Yes 4 No
Amrinder Singh Rajomajra
 
Answer
# 4
1. The main advantage of using the star delta starter is
reduction of current during the starting of the
motor.Starting current is reduced to 3-4 times Of current
of Direcr online starting.

2. Hence the starting current is reduced , the voltage
drops during the starting of motor in systems are reduced.
 
Is This Answer Correct ?    15 Yes 3 No
Mohanraj
 
Answer
# 5
How the current is being reduced to 1/3 times in star/delta
starting. Can you please show it by derivation.
In my views power is reduced by 1/3 times and current and
voltage by 1/root 3 times. pls correct.
 
Is This Answer Correct ?    9 Yes 2 No
Partha
 
Answer
# 6
The main advantage is of-course the issue of starting current.In this case the starting line current is reduced to one third.Most importantly, starting torque is also reduced by the same amount.So pumps,motor-generator sets, where starting torque is not required to be high can take the advantage of star-delta starting.
But the problem is, this method is not adoptable for the motors which have high voltage rating(generally above 3kv).The reason behind:such motors are usually star-connected.We must have delta connection in the induction motor.
 
Is This Answer Correct ?    5 Yes 2 No
Jishnu Mukherjee
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
if power factor comes in leading & showing -0.95. Is there any effect on electrical system? if yes, then please tell me what would be the effects. & how long we keep power factor in leading. Keeping power factor in leading shows more KW & less KVA is it correct or not. Jakson 2
how can we change the supply voltage? Areva 4
I HAVE CONSUMER WHOSE POWER FACTOR IS 65% I WANT TO INCREASE IT TO 98%.HOW TO CARRY OUT?   7
Hi to u all : Friends: Why when operate on 2 phase welding machine the power metr goes reverse ?? the meter is god on other loads. thanks Gedco 2
How Many safety of Air circuit breaker   2
what is the significance of tan delta testing?explain the theory?   7
A cylindrical wire is compressed in length by 10%. The percentage decrease in the resistance will be?????   4
what are the differance between neutral and earthing?   3
Why do we use only Sinusoidal Wave in AC supply why not the Square,Triangle or Sawtooth etc?   2
in three phase with neutral connection, what will happen,if the neutral is in open condition with single phase distribution panel   4
What are the difference between off-load tap changer and on-load tap changer in transformer? HCL 2
how we are measuring the winding temperature of the transformer?   11
 
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