YOKOGAWA WT332 User Manual page 54

2.9 Wiring the Circuit under Measurement for Direct Input
Wiring Example of a Single-Phase, Three-Wire System (1P3W)
The wiring is connected to input elements 1 and 3.
SOURCE
N
C
Element 1
(V1, A1)
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
R
S
T
±
C
±
Element 1
(V1, A1)
Wiring Example of a Three-Phase, Four-Wire System (3P4W)
Applies to the WT333.
The wiring is connected to input elements 1, 2, and 3.
SOURCE
R
S
T
N
±
C
±
Element 1
(V1, A1)
2-24
LOAD
± ±
V V
C
± ±
Element 3
(V3, A3)
LOAD
±
V V
C
±
Element 3
(V3, A3)
±
V
V
C
±
Element 2
(V2, A2)
N
SOURCE
SOURCE
T
LOAD
SOURCE
T
±
V
C
±
Element 3
(V3, A3)
C ±
I1
V
U1
±
±
U3
V
I3
C ±
C ±
I1
V
R U1
±
S
±
U3
V
I3
C ±
C ±
I1
V
R U1
±
N
±
S
U2
C ±
V
I2
U3
I3
±
C
LOAD
LOAD
LOAD
±
V
IM WT310-02EN