YOKOGAWA WT1800 User Manual page 46

Wiring Example of a Three-Phase, Three-Wire System (3P3W)
If six input elements are available, three three-phase, three-wire systems can be wired.
SOURCE
R
S
T
U
±
I
±
Input element 1
(U1 and I1)
Wiring Example of a Three-Phase, Three-Wire System That Uses
a Three-Voltage, Three-Current Method (3P3W; 3V3A)
If six input elements are available, two three-phase, three-wire systems that use a three-voltage, three-
current method can be wired.
SOURCE
R
S
T
U
±
I
±
Input element 1
(U1 and I1)
Wiring Example of a Three-Phase, Four-Wire System (3P4W)
If six input elements are available, two three-phase, four-wire systems can be wired.
SOURCE
R
S
T
N
U
±
I
±
Input element 1
(U1 and I1)
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."
IM WT1801-03EN
2.9 Wiring the Circuit under Measurement for Direct Input
LOAD
U
±
I
±
Input element 2
(U2 and I2)
U U
± ±
I I
± ±
Input element 2 Input element 3
(U2 and I2) (U3 and I3)
U U
± ±
I I
± ±
Input element 2 Input element 3
(U2 and I2) (U3 and I3)
I ±
I1
R
SOURCE
T S
I2
I ±
U
U2
±
LOAD
I
I1
R
SOURCE
S
T
I2
I
I3
I
LOAD
±
I
I1
R
SOURCE
N
T S
I2
I
I3
I ±
U
U1
± LOAD
±
U
U
LOAD
U3 U1
± ±
±
U
U2
±
±
U
U1
±
LOAD
±
±
U3 U2
U
U
±
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2
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App
Index