Megger TTR25, Инструкция по эксплуатации

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M
AVTMTTR25 Rev C April 2008
50
Table C-2 ANSI Transformer Winding Phase Relationship
Copyright 1999
©
Megger
Winding Connection Winding Tested
Diag
No.
IEC
Vector
Group
High-Voltage
Winding (H)
Low-Voltage
Winding (X)
Phase
Tested
Winding
Shorted
By TTR
High-
Voltage
Winding
Low-
Voltage
Winding
Measured
Turn Ratio
37 Yd1
A
B
C H
3
- H
2
H
1
- H
3
H
2
- H
1
H
1
-(H
3
+H
2
)
H
2
-(H
1
+H
3
)
H
3
-(H
2
+H
1
)
X
1
- X
2
X
2
- X
3
X
3
- X
1
V
V
H
X
•
3
2
38 YNd5
A
B
C
⎯
H
1
- H
0
H
2
- H
0
H
3
- H
0
X
3
- X
1
X
1
- X
2
X
2
- X
3
V
V
H
X
•
3
39 Yd5
A
B
C H
3
- H
2
H
1
- H
3
H
2
- H
1
H
1
-(H
3
+H
2
)
H
2
-(H
1
+H
3
)
H
3
-(H
2
+H
1
)
X
3
- X
1
X
1
- X
2
X
2
- X
3
V
V
H
X
•
3
2
40 Yd7
A
B
C H
3
- H
2
H
1
- H
3
H
2
- H
1
H
1
-(H
3
+H
2
)
H
2
-(H
1
+H
3
)
H
3
-(H
2
+H
1
)
X
2
- X
1
X
3
- X
2
X
1
- X
3
V
V
H
X
•
3
2
41 YNd11
A
B
C
⎯
H
1
- H
0
H
2
- H
0
H
3
- H
0
X
1
- X
3
X
2
– X
1
X
3
– X
2
V
V
H
X
•
3