Megger AVTMTTR100 User Manual

SETUP AND CONNECTIONS
AVTMTTR100-ENG Rev 6 Nov 2015
31
Table 5-2. ANSI Transformer Winding Phase Relationship
Copyright 2009 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 Remarks
26 Yz1
A+B
B+C
C+A
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
No
accessible
neutral
27 Yzn5
A
B
C
H
1
- H
3
H
2
- H
1
H
3
- H
2
X
3
- X
0
X
1
- X
0
X
2
- X
0
No
accessible
neutral on
wye winding
28 Yz5
A+B
B+C
C+A
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
No
accessible
neutral
29 Yzn7
A
B
C
H
1
- H
3
H
2
- H
1
H
3
- H
2
X
0
- X
1
X
0
- X
2
X
0
- X
3
No
accessible
neutral on
wye winding
30 Yz7
A+B
B+C
C+A
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
No
accessible
neutral
31 Yzn11
A
B
C
H
1
- H
3
H
2
- H
1
H
3
- H
2
X
0
- X
3
X
0
- X
1
X
0
- X
2
No
accessible
neutral on
wye winding
V
V
H
X
•
3
2
V
V
H
X
• 3
V
V
H
X
•
3
2
V
V
H
X
• 3
V
V
H
X
•
3
2
V
V
H
X
• 3

Megger AVTMTTR100 Specifications

General

Brand	Megger
Model	AVTMTTR100
Category	Test Equipment
Language	English