Megger AVTMTTR100 - Table 5-4. Transformer Winding Phase Relationship (Australian Std. 2374, Part 4 - 2003)

SETUP AND CONNECTIONS
AVTMTTR100-ENG Rev 6 Nov 2015
47
Table 5-4. Transformer Winding Phase Relationship (Australian Std. 2374, Part 4 - 2003)
Copyright 2009 Megger
Winding Connection Winding Tested
Diag
No.
IEC
Vector
Group
High-Voltage
Winding (HV)
Low-Voltage
Winding (LV)
Phase
Tested
Winding
Shorted
By TTR
High-
Voltage
Winding
Low-
Voltage
Winding
Measured
Turn
Ratio
Remarks
1
1
1ph0
1
A
2
- A
1
a
2
- a
1
HV
LV
Single-phase
transformer
2
1
1ph6
1
A
2
- A
1
a
1
- a
2
HV
LV
Single-phase
transformer
3
Dd0
A
B
C
A
2
- B
2
B
2
- C
2
C
2
- A
2
a
2
- b
2
b
2
- c
2
c
2
- a
2
HV
LV
4
Dd6
A
B
C
A
2
- B
2
B
2
- C
2
C
2
- A
2
b
1
- a
1
c
1
- b
1
a
1
- c
1
HV
LV
5
Dyn1
A
B
C
A
2
- B
2
B
2
- C
2
C
2
-A
2
n - b
2
n - c
2
n - a
2
HV
LV
• 3
Neutral
accessible
on wye
winding
6 Dy1
A
B
C
B
2
- C
2
C
2
- A
2
A
2
- B
2
A
2
- B
2
B
2
- C
2
C
2
- A
2
c
2
- b
2
a
2
- c
2
b
2
- a
2
HV
LV
• 3
No neutral
accessible
on wye
winding
7 Dyn11
A
B
C
A
2
- B
2
B
2
- C
2
C
2
- A
2
a
2
- n
b
2
- n
c
2
- n
HV
LV
• 3
Neutral
accessible
on wye
winding