3-23
IM 760301-01E
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App
Index
Before Starting Measurements
Wiring Example of a Three-Phase, Three-Wire System (3P3W) Using VT and CT
L CT
VT
V
v
l
L CT
VT
V
v
l
SOURCE
LOAD
R
S
T
Input terminal 1
I
±
U
±
Input terminal 2
I
±
U
±
Wiring Example of a Three-Phase, Three-Wire System (Three-Voltage, Three-Current
System) [3P3W (3V3A)] Using VT and CT
L CT
VT
V
v
l
L CT
VT
V
v
l
SOURCE
L CT
VT
V
v
l
LOAD
R
S
T
Input terminal 1
I
±
U
±
Input terminal 2
I
±
U
±
Input terminal 3
I
±
U
±
Wiring Example of a Three-Phase, Four-Wire System (3P4W) Using VT and CT
L CT
VT
V
v
l
L CT
VT
V
v
l
SOURCE
L CT
VT
V
v
l
LOAD
R
S
T
N
Input terminal 1
I
±
U
±
Input terminal 2
I
±
U
±
Input terminal 3
I
±
U
±
Note
For the relationship between the wiring systems and the method of determining the measured
values or computed values, see Appendix 1, “Symbols and Determination of Measurement
Functions.”
3.11 Wiring the Circuit under Measurement When Using the VT/CT