6-31
IM CW500-01EN
Event Detection
Press F2 (detection) to toggle the type of displayed events.
All events
Swell
Dip
INT
Transient
Inrush
current
Displaying a List of Flicker Measurements
<Procedure>
Press F1 to display the flicker screen.
→
Use the up and down arrow
keys to display a screen showing V: List display/Pst(1min): Trend graph/
Plt: Transitional change.
Time left
If variable loads, such as an arc furnace, are connected, voltages may
vary and cause lights to flicker. This phenomenon is called voltage flicker,
and its severity level is expressed by Pst and Plt.
Display Symbol
Remaining
time (time left)
The countdown time until a Pst calculation completes.
This usually takes about 10 minutes.
V
Phase voltage.
*
For 3P3W and 3P3W3A, rms line
voltages are displayed.
f
Frequency
Pst,1min
Severity of short-term flicker measured over 1 minute.
This is useful for power quality survey or study.
Pst
Severity of short-term flicker measured over 10 minutes.
Pst,MAX
The maximum Pst value measured since the start of
measurement. The display is updated every time the
measured value exceeds the previous maximum value.
6.7 Power Quality
