YOKOGAWA WT1800 User Manual page 53

2.11 Wiring the Circuit under Measurement When Using Voltage and Current Transformers
Wiring Example of a Three-Phase, Three-Wire System (3P3W)
with VTs and CTs
SOURCE
R
S
T
L CT
l
Input element 1
Wiring Example of a Three-Phase, Three-Wire System That Uses
a Three-Voltage, Three-Current Method (3P3W; 3V3A) with VTs
and CTs
SOURCE
R
S
T
L CT
l
Input element 1
Wiring Example of a Three-Phase, Four-Wire System (3P4W) with
VTs and CTs
SOURCE
R
S
T
N
L CT
l
Input element 1
Note
For details about the relationship between the wiring system and how measured and computed values are
determined, see appendix 1, "Symbols and Determination of Measurement Functions."
2-24
VT
V
v
U
±
I
±
V
v
U
±
I
±
VT
V
v
U
±
I
±
LOAD
VT
L CT V
l v
U
±
I
±
Input element 2
L CT VT
V
l v
U
±
I
±
Input element 2
VT
L CT V
l v
U
±
I
±
Input element 2
LOAD
L CT VT
V
l v
U
±
I
±
Input element 3
LOAD
VT
L CT V
l v
U
±
I
±
Input element 3
IM WT1801-03EN