Megger TTR25, Инструкция по эксплуатации

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M
AVTMTTR25 Rev C April 2008
68
Table C-4 Transformer Winding Phase Relationship (Australian Std. 2374, Part 4 - 1982)
Copyright 1999
©
Megger
Winding Connection Winding Tested
Diag
No.
IEC
Vector
Group
High-Voltage
Winding
Low-Voltage
Winding
Phase
Tested
External
Jumpers
High-
Voltage
Winding
Low-
Voltage
Winding
Measured
Turn Ratio
26 Yd1
A
B
C B
2
- C
2
C
2
- A
2
A
2
- B
2
A
2
-(B
2
+C
2
)
B
2
-(C
2
+A
2
)
C
2
-(A
2
+B
2
)
a
2
- b
2
b
2
- c
2
c
2
- a
2
HV
LV
•
3
2
27 YNd11
A
B
C
⎯
⎯
⎯
A
2
- N
B
2
- N
C
2
- N
a
2
- c
2
b
2
- a
2
c
2
- b
2
HV
LV 3
•
28 Yd11
A
B
C B
2
- C
2
C
2
- A
2
A
2
- B
2
A
2
-(B
2
+C
2
)
B
2
-(C
2
+A
2
)
C
2
-(A
2
+B
2
)
a
2
- c
2
b
2
- a
2
c
2
- b
2
HV
LV
•
3
2
29 ZNd0
A
B
C b
2
- c
2
c
2
- a
2
a
2
- b
2
A
4
- N
B
4
- N
C
4
- N
a
2
- (b
2
+c
2
)
b
2
- (c
2
+a
2
)
c
2
- (a
2
+b
2
)
HV
1.5 LV
30 Zd0
A
B
C
⎯
⎯
⎯
A
4
- B
4
B
4
- C
4
C
4
- A
4
a
2
- b
2
b
2
- c
2
c
2
- a
2
HV
LV
31 ZNd6
A
B
C b
1
- c
1
c
1
- a
1
a
1
- b
1
A
4
- N
B
4
- N
C
4
- N
(b
1
+c
1
) - a
1
(c
1
+a
1
) - b
1
(a
1
+b
1
) - c
1
HV
1.5 LV