YOKOGAWA WT310

2-43
IM WT310-02EN
Making Preparations for Measurements
1
2
3
4
5
6
7
App
Index
Wiring Example of a Three-Phase, Four-Wire System (3P4W) with
VTs and CTs
Model: Applies to the WT333.
The wiring is connected to input elements 1, 2, and 3.
SOURCE
LOAD
L
CT VT
V
v
L
CT
VT
V
v
L
CT
VT
V
v
S
T
R
N
Element 1
Element 2 Element 3
C
±
±
V
C
±
±
V
C
±
±
V
Wiring Example With the Three-Voltage, Three-Current Method
(3V3A) and VTs and CTs
Model: Applies to the WT333.
The wiring is connected to input elements 1, 2, and 3.
SOURCE LOAD
S
T
R
L
CT
VT
V
v
L
CT
VT
V
v
L
CT
VT
V
v
Element 1
Element 2 Element 3
C
±
±
V
C
±
±
V
C
±
±
V
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.”
2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer