65
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
74
Zd0
A
B
C
I
II
III
-
-
-
H1-H2
H2-H3
H3-H1
X1-X2
X2-X3
X3-X1
X
H
V
V
75
ZNd0
A
B
C
I+III
II+I
III+II
H2-H3
H3-H1
H1-H2
H1-H0
H2-H0
H3-H0
X1-X2
X2-X3
X3-X1
3
2
X
H
V
V
76
ZNd6
A
B
C
I+III
II+I
III+II
H2-H3
H3-H1
H1-H2
H1-H0
H2-H0
H3-H0
X2-X1
X3-X2
X1-X3
3
2
X
H
V
V
H1
H3
H2
H0
C
B
A
X1
X3
X2
b
a
c
H1
H3
H2
H0
C
B
A
X2
X1
X3
b
c
a
H1
H3
H2
*
C
B
A
X1
X3
X2
b
a
c