YOKOGAWA WT332E User Manual page 60

2.9 Wiring the Circuit under Measurement for Direct Input
Example Wiring Procedure
This example will explain the procedure that you should use to configure the wiring when using the
WT310E to measure the power of a single-phase, two-wire DUT. The procedure is the same when
measuring using the WT310EH.
Power supply
This example shows how to configure the wiring pattern shown in the upper left of the figure on the
previous page.
SOURCE
±
Order of Connection
Generally, it is easier to follow the wiring diagram if you wire to the current input terminals first and
then to the voltage input terminals. In this example as well, we will wire to the WT310E current input
terminals first and then to the voltage input terminals.
Wiring to the Current Input Terminals
Connect the current input terminals in series with the DUT along one of the power cables between
the DUT and the power source.
1 Cut one power cable at the position that you want to insert the power meter into.
Cutting the low-voltage cable and inserting the power meter reduces the effects of noise during power
measurement.
2-26
Power cables
LOAD
C
V
±
L H
High-voltage cable
Low-voltage cable
SOURCE
±
I
WT310E
DUT
V
U LOAD
±
C
IM WT310E-02EN