Table C-2. Ansi Transformer Winding Phase Relationship - Megger TTR20 Instruction Manual

M
Table C-2. ANSI Transformer Winding Phase Relationship
Copyright 2009 Megger
IEC
Diag Vector High-Voltage
No. Group Winding (H)
1
1
1ph0
1
2
1ph6
3 Dd0
4 Dd6
5 Dyn1
6 Dyn7
7 YNyn0
Winding Connection
Low-Voltage
Winding (X)
Winding Tested
Winding High-
Phase Shorted Voltage
Tested By TTR Winding
H - H
1
1 2
H - H
1
1 2
A H - H
1 3
B H - H
2 1
C H - H
3 2
A H - H
1 3
B H - H
2 1
C H - H
3 2
A H - H
1 3
B H - H
2 1
C H - H
3 2
A H - H
1 3
B H - H
2 1
C H - H
3 2
A H - H
1 0
B H - H
2 0
C H - H
3 0
44
Low-
Voltage Measured
Winding Turn Ratio Remarks
Single-phase
V
H
X - X transformer
1 2 V
X
Single-phase
V
H
X - X transformer
2 1 V
X
X - X
V
1 3
H
X - X
2 1 V
X
X - X
3 2
X - X
V
3 1
H
X - X
1 2 V
X
X - X
2 3
Neutral
X - X accessible
• 3
1 0
V
H
X - X on wye
2 0
V
X - X winding
X
3 0
X - X Neutral
0 1 • 3
V
H
X - X accessible
0 2
V
X - X on wye
X
0 3
winding
X - X Neutral
V
1 0 H
X - X accessible
2 0 V
X
X - X both wye
3 0
windings
AVTMTTR20 Rev 4 Dec 2015