56
TRT33A Vector Groups ANSI
Single-phase test of three-phase transformers ANSI
Table of vector group connections (ANSI)
No.
Vector
group
Winding connections
Connections
Phase Limb
Short
circuit
Tested winding
Calculated
ratio
HV winding
XV winding
HV winding
XV winding
1
1ø
1ph0
1ø
-
H1-H2
X1-X2
X
H
V
V
2
1ø
1ph6
1ø
-
H1-H2
X1-X2
X
H
V
V
3
Yy0
A
B
C
II+I
III+II
I+III
-
-
-
H2-H1
H3-H2
H1-H3
X2-X1
X3-X2
X1-X3
X
H
V
V
4
Yyn0
A
B
C
I+II
II+III
III+I
-
-
-
H1-H2
H2-H3
H3-H1
X1-X2
X2-X3
X3-X1
X
H
V
V
5
YNy0
A
B
C
I
II
III
H2-H0
H3-H0
H1-H0
H1-(H2+H0)
H2-(H3+H0)
H3-(H1+H0)
X1-X2
X2-X3
X3-X1
X
H
V
V
6
YNyn0
A
B
C
I
II
III
-
-
-
H1-H0
H2-H0
H3-H0
X1-X0
X2-X0
X3-X0
X
H
V
V
7
Yy6
A
B
C
II+I
II+III
I+III
-
-
-
H1-H2
H2-H3
H3-H1
X2-X1
X3-X2
X1-X3
X
H
V
V
8
Yyn6
A
B
C
I+II
II+III
III+I
-
-
-
H1-H2
H2-H3
H3-H1
X2-X1
X3-X2
X1-X3
X
H
V
V
9
YNy6
A
B
C
I
II
III
H2-H0
H3-H0
H1-H0
H1-H0
H2-H0
H3-H0
X2-X1
X3-X2
X1-X3
X
H
V
V
H1
H2
X1
X2
H1
H2
X1
X2
a
A
H2
H1
H3
X2
X1
X3
*
*
B
C
c
b
A
H2
H1
H3
X2
X1
X3
X0
*
B
C
a
c
b
a
H2
H1
H3
X2
X1
X3
*
H0
B
C
A
c
b
H2
H1
H3
X2
X1
X3
H0
X0
B
C
A
a
c
b
H2
H1
H3
X2
X1
X3
*
*
B
C
a
b
c
A
A
H2
H1
H3
X2
X1
X3
X0
*
B
C
a
b
c
X1
*
H2
H1
H3
X2
X3
H0
B
C
A
a
c