Wiring The Measurement Circuit - YOKOGAWA WT110 User Manual

3.4

Wiring the Measurement Circuit

WARNING
CAUTION
Wiring diagram for single-phase, two-wire system (253401, 253502, 253503)
Wiring diagram for single-phase, three-wire system (253502, 253503)
IM 253401-01E
• When applying a current to be measured directly to the input terminals of
the instrument, disconnect the input cable of the external sensor. A voltage
might be generated by the external sensor input terminal when connected.
• A load current flows in the thick lines show in the diagrams; therefore, a
wire with sufficient current capacity must be used for these lines.
SOURCE LOAD
V
±
A
±
Input terminal
(ELEMENT)
SOURCE LOAD
V
±
A
±
Input terminal
(ELEMENT)
SOURCE
N
V V
±
±
A A
± ±
Input terminal Input terminal
(ELEMENT1)
(ELEMENT3)
Note
The wire connected from the source the ± current terminal must be routed as close as possible to the
ground potential in order to minimize measurement error.
SOURCE
SOURCE
LOAD
SOURCE
N
V
V LOAD
±
±
A
A
±
A
A
V
V LOAD
±
±
A
A
1
V
V
1
±
LOAD
±
V
3
V
A
3
±
A
3-5
3