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Question
why we are using star connection and delta connection? 
difference?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
In a simple way:
Relationships:
Phase current=Line current
Line volage = 1.732*Phase voltage.

In Delta:
Relationships:

Line current=1.732*Phase current
Line voltage = Phae voltage

In Power systems let us say for transportation Delta is
preferable as it has 3 wires only and in distribution Star
is needed as we need Neutral also.So at the end of the
trasmission lines there will be delta/star transformer
provided.
One more thing if you consider the macines point of view
for the same line voltage copper required for star
connection is less compared to Delta as the line voltage in
Star id 1.732*phase voltage. So the winding design is to be
done to bear the 57.7% of the applied voltge which reduces
the dielectic stress and insulation resitance can be saved
interms of money.
 
Is This Answer Correct ?    26 Yes 4 No
Rao
 
Answer
# 2
The basic difference is that star generates a high voltage
at a low current, and delta generates low voltage at a high
current. But total(No load) power generated is the same.
 
Is This Answer Correct ?    15 Yes 10 No
Wayiti Lukas
 
 
 
Answer
# 3
tell me the application where u want to know, eg.
transformers, motors etc..
 
Is This Answer Correct ?    14 Yes 14 No
Loganath
 
Answer
# 4
In Star is used for 3 Phase 4 Wire System &

Delta is used for 3 Phase 3 Wire System.


Difference:-
In Star Line Voltage is Root 3 times the Phase Voltage.
In the Simple term in Delta only R,Y&B Wires..

In Delta Line Voltage is Equal to the Phase Voltage.
In the Simple term in Delta its R,Y,b & N, 4 Wire System..
 
Is This Answer Correct ?    27 Yes 41 No
Thowsif
 

 
 
 
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