YOKOGAWA WT210, User Manual, Page: 32 / 316

S-16
IM 760401-01E
Tips
There are cases when we wish to measure, as a voltage on the secondary side of
the inverter, the converted rms voltage (rectified mean value calibrated to the rms
value) that is derived by summing the absolute values of the voltage over a single
period, dividing the result by the time of one period, and making a conversion. The
WT230 provides a function for measuring the rectified mean value calibrated to the
rms value of only the voltage. For the setup procedure, see section 4.1, “Selecting
the Measurement Mode.”
Displaying the Current on the Secondary Side of the Inverter on Display B
Carry out the following procedure to display the current of the secondary side of the inverter
on display B.
W
A
B
C
VOLTAGE
AUTO
MODE
CURRENT
AUTO
RANGE
MAX HOLD TRIG
CAL
INTEGRATOR
INTEG SET
SHIFT KEY LOCK
1P3W 3P3W
3P4W 3V3A
OUTPUT
HARMONICS MEMORY
REMOTE
FUNCTION ELEMENT
HOLD
ENTER
RESET
WIRING
START STOP
LOCAL SETUP
1
m
V
k A V
TIME
ar
deg
h
h
VA
M
m
PF
k
A
M W
m
V Hz
k A
M W
2 3
FUNCTION ELEMENT
1 2 3
FUNCTION ELEMENT
1 2 3
%
Function indicator Element indicator
V
9.
Press
FUNCTION
of display B to select function A.
For details, see step 3 of page S-11.
10.
Press
ELEMENT
of display B to select input element 1, 3 or
Σ
.
Each time
ELEMENT
is pressed the element indicator character of display B illuminates in the
order shown below. The wiring system of the circuit on the secondary side of the
inverter is three-phase, three-wire, and the circuit is connected to input elements 1 and
3 of the WT230. To show the measured value of input element 1, 3, or
Σ
on display B,
we illuminate input element 1, 3, or
Σ
.
Display B
ELEMENT ELEMENT ELEMENT ELEMENT
1 2 3
Σ
1 2 3
1 2 3 1 2 3 1 2 3
• When input element 1 is illuminated, the line current of phase U (see page S-6) on the
secondary side of the inverter is indicated.
• When input element 3 is illuminated, the line current of the W phase (see page S-6)
on the secondary side of the inverter is indicated.
• When input element
Σ
is illuminated, the average of the line current of phase U and W
on the secondary side of the inverter is indicated. However, this value does not have
any physical meaning.
Displaying Voltage, Current, and Active Power