66
TRT33A Vector Groups 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
77
Ya0
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
78
YNa0
A
B
C
I
II
III
-
-
-
H1-H0
H2-H0
H3-H0
X1-X0
X2-X0
X3-X0
X
H
V
V
79
Ya4
A
B
C
I+II
II+III
I+III
-
-
-
H1-H2
H2-H3
H1-H3
X3-X1
X1-X2
X3-X2
X
H
V
V
80
YNa4
A
B
C
I+III
II+I
III+II
-
-
-
H1-H0
H2-H0
H3-H0
X3-X1
X1-X2
X2-X3
X
H
V
V
81
Ya8
A
B
C
II+I
III+II
I+III
H1-H3
H2-H1
H3-H2
H2-(H1+H3)
H3-(H2+H1)
H1-(H3+H2)
X2-X1
X3-X2
X1-X3
X
H
V
V
82
YNa8
A
B
C
I+III
II+I
III+II
-
-
-
H1-H0
H2-H0
H3-H0
X1-X3
X2-X1
X3-X2
X
H
V
V
83
Da
A
B
C
I
II
III
-
-
-
H1-H2
H2-H3
H3-H1
X1-X2
X2-X3
X3-X1
X
H
V
V
84
Za
A
B
C
I
II
III
-
-
-
H1-H2
H2-H3
H3-H1
X1-X2
X2-X3
X3-X1
X
H
V
V
85
ZNa
A
B
C
I
II
III
-
-
-
H1-H2
H2-H3
H3-H1
X1-X2
X2-X3
X3-X1
X
H
V
V
A
H2
H1
H3
*
B
C
X1
X2
X3
A
H2
H1
H3
0
B
C
X1
X2
X3
A
H2
H1
H3
*
B
C
X3
X1
X2
A
H2
H1
H3
0
B
C
X3
X1
X2
A
H2
H1
H3
B
C
X1
X2
X3
*
A
H2
H1
H3
B
C
X1
X2
X3
0
H1
A
H2
H3
C
B
X1
X2
X3
H1
H3
H2
*
C
B
A
X1
X2
X3
H1
H3
H2
0
C
B
A
X1
X2
X3