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Question
`How to take Vector group test of Transformer?`
Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By

# 1
Assumed the transformer vector group is DYn11;
1.1U1V1W-which is primary -Delta Connection
2.2U2V2W- Which is secondary-Star connection
3.join 1U& 2U terminals
4.Supply 1U-1V-1W 440v Measured
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
TO CHECK
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N
From above check(1,2,3) the vector group of transformer is
verified

 Is This Answer Correct ? 170 Yes 22 No
Dinesh Kumar

# 2
Assumed the transformer vector group is DYn11;
1.1U1V1W-which is primary -Delta Connection
2.2U2V2W2N- Which is secondary-Star connection
3.By connecting terminals 1U& 2U
4.Then three phase Supply is given to 1U-1V-1W
5.By measuring the terminal given below
We get
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
THE BELOW GIVEN CONDITION IS SATISFIED THEN DYn11 IS
CONFIRMED
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N

 Is This Answer Correct ? 100 Yes 23 No
E.saravanan

# 3
The above method is correct
 Is This Answer Correct ? 37 Yes 9 No
Elangovan

# 4
wht abt YN d11 transformer...??????
 Is This Answer Correct ? 21 Yes 7 No
Sajeesh

# 5
can anyone say me hoe to draw vector group and what is the
use of different vector group and its application plz

 Is This Answer Correct ? 14 Yes 6 No
Srinivas

# 6
Vector group is punched on the name plate based on the user
requirement by the manufacture. Aim of vector group test is
at site is to check if their is any damage in the windings
during transportation and erection.
3 -phase AC supply is given on HV side. R-Phase HV and r-
phase LV shorted for all vector group of transformer

Then to qualify the test following conditions are to be
satisfied after measurement of voltages.

nR+nY=RY, By>> Bb and Yb=Yy.

 Is This Answer Correct ? 10 Yes 3 No
Vinod

# 7
Procedure given by Mr. dinesh kumar & Mr. E.saravanan is
correct but is there any explanation for this three
conditions.
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N

 Is This Answer Correct ? 7 Yes 2 No

# 8
1U-1V=[1U-2N]-[1V-2N]
 Is This Answer Correct ? 6 Yes 2 No
Tum

# 9
can anybody tell hw u r writing this is the vector group
calculation for this one.....
what happens if the voltages r not satisfied for the
specified vector group and if so what to do.......

 Is This Answer Correct ? 4 Yes 2 No
Vinay Kumar

# 10
1.1U1V1W-which is primary -Delta Connection
2.2U2V2W- Which is secondary-Star connection
3.join 1U& 2U terminals
4.Supply 1U-1V-1W 440v Measured
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
TO CHECK
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N
From above check(1,2) the vector group of transformer is
verified

 Is This Answer Correct ? 3 Yes 1 No

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