YOKOGAWA WT500 - Page 84

3-23
IM 760201-01E
Before You Start Measuring
3
2
1
4
5
6
7
8
9
10
11
12
13
14
App
Index
Wiring Example of a Three-Phase, Three-Wire System (3P3W) with a VT and CT
L
CT
VT
V
vl
L
CT
VT
V
vl
SOURCE
LOAD
R
S
T
Input terminal 1
I
U
Input terminal 2
I
U
±
±
±
±
Wiring Example of a Three-Phase, Three-Wire System with a Three-Voltage,
Three-Current Method (3P3W; 3V3A), a VT, and a CT
L
CT
VT
V
vl
L
CT
VT
V
vl
SOURCE
L
CT
VT
V
vl
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) with a VT and CT
L
CT
VT
V
vl
L
CT
VT
V
vl
SOURCE
L
CT
VT
V
vl
LOAD
R
S
T
N
Input terminal 1
I
U
Input terminal 2
I
U
Input terminal 3
I
U
±
±
±
±
±
±
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.”
3.11 Wiring the Circuit That You Will Measure with a VT or CT