25
Application
Table 3-1 Different Vector Groups
IEC
60076
vec-
tor
group
Winding connection Mea-
sure-
ment
Trans-
former
high-
voltage side
Trans-
former
low-voltage
side
Mea-
sured
turn
ratio
HV / H LV /X
Dd0 A U-V / H1-H2 u-v / X1-X2 1
B V-W / H2-H3 v-w / X2-X3
C W-U / H3-H1 w-u / X3-X1
Dd2 A U-V / H1-H2 w-v / X3-X2 1
B V-W / H2-H3 u-w / X1-X3
C W-U / H3-H1 v-u / X2-X1
Dd4 A U-V / H1-H2 w-u / X3-X1 1
B V-W / H2-H3 u-v / X1-X2
C W-U / H3-H1 v-w / X2-X3
Dd6 A U-V / H1-H2 v-u / X2-X1 1
B V-W / H2-H3 w-v / X3-X2
C W-U / H3-H1 u-w / X1-X3