6.3 Viewing Anomalous Phenomena (EVENT screen)
111
6
Voltage Dip
• Detection Method
Detect Using Urms 1/2.
Set the threshold as a percentage of nominal volt-
age. When the rms voltage falls below the nega-
tive threshold, it is detected as an “EVENT IN
(o
nset)" event. Subsequently, when the voltage
rises back above the threshold (plus appropriate
hysteresis), it is detected as an “EVENT OUT
(recovery)” event.
• Recording Contents
Event list data, voltage/corrent waveforms, event
v
oltage fluctuation graph
• Event Data Format
EVENT IN (Onset): Event no., occurrence date,
oc
currence time, event type, channel, IN
EVENT OUT (Recovery): Event no., occurrence
da
te, occurrence time, event type, channel, OUT,
residual voltage, continuation period
• Event Voltage Fluctuation Graph
Fluctuation graph of Urms from about 0.5 sec-
onds before detection to about 2.5 seconds after
d
etection
Interruption
• Detection Method
Detect using Urms 1/2. Set the threshold as a
pe
rcentage of nominal voltage.
When the rms voltage falls below the threshold, it
i
s detected as an “EVENT IN (onset)" event. Sub-
sequently, when the voltage rises back above the
thr
eshold (plus appropriate hysteresis), it is
detected as an “EVENT OUT (recovery)” event.
• Recording Contents
Event list data, voltage/corrent waveforms, event
v
oltage fluctuation graph
• Event Data Format
EVENT IN (Onset): Event no., occurrence date,
oc
currence time, event type, channel, IN
Event EVENT OUT (Recovery): Event no., occur-
rence date, occurrence time, event type, channel,
OU
T, residual voltage, continuation period
• Event Voltage Fluctuation Graph
Fluctuation graph of Urms from about 0.5 sec-
onds before detection to about 2.5 seconds after
d
etection
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