2-31
IM WT310E-02EN
Making Preparations for Measurements
1
2
3
4
5
6
7
App
Index
Wiring Example of a Single-Phase, Three-Wire System (1P3W)
The wiring is connected to input elements 1 and 3.
±
±
C
V
±
V
±
C
N
SOURCE
SOURCE
LOAD
LOAD
C
±
±
Element 1
(V1, A1)
V
N
Element 3
(V3, A3)
U1
U3
I3
I1
C
±
± V
Wiring Example of a Three-Phase, Three-Wire System (3P3W)
The wiring is connected to input elements 1 and 3.
Measure the line voltage using S-phase power as the reference.
SOURCE
LOAD
I1
±
C
±
I3 ±
C
U1
±
V
U3
V
R
S
T
SOURCE
LOAD
Element 1
(V1, A1)
R
S
T
Element 3
(V3, A3)
C
±
± V
C
±
± V
Wiring Example of a Three-Phase, Four-Wire System (3P4W)
Applies to the WT333E.
The wiring is connected to input elements 1, 2, and 3.
SOURCE
LOAD
I1
±
C
±
I3 ±
C
U1
±
V
U3
V
R
N
S
T
SOURCE
Element 1
(V1, A1)
R
S
T
N
Element 2
(V2, A2)
LOAD
Element 3
(V3, A3)
U2
±
V
I2
±
C
C
±
± V
C
±
± V
C
±
± V
2.9 Wiring the Circuit under Measurement for Direct Input
