KYORITSU 6315 Quick Manual - Manual (Page 34)

KEW6315 Transient
KEW6315 - 32 -
Transient
Voltage waveforms will be monitored at approx 40ksps, gapless, to calculate and check for transient event
every 200ms. The beginning of the 200ms period where the first transient is detected is regarded as the
start of the event. If further events are not detected in the following 200ms period, the beginning of the
period is regarded as the end of the event. The detected transient is assumed to be continued between the
start to the end of event detection.
Example: Transient event detection
Saved data
When an event occurs and is detected, KEW6315 records the type of the event, start/ end time and the
values. The following data will also be recorded. The event waveform is recorded for 200ms during the
1 sec of the data refresh period.
Event waveform
Waveforms and also event data on all the chs are recorded for approx. 200ms (50Hz: 10-cycle, 60Hz:
12-cycle) at 8192 points in total. When different events occur within 1 sec, only the waveforms which
contain the highest-priority events will be recorded. However, if the same type of events occur at the
same time, the one containing the highest (deepest) values will be recorded. If the highest (deepest)
values are also the same, the one with a longer duration will be recorded. As for the channels, there is
no priority order.
Priority order: Voltage transient-> Int-> Dip-> Swell-> Inrush current
RMS variations
Voltage/ current rms value (resolution: half-cycle) variations and event data on all chs are recorded for
1 sec at data refresh.
Example: Dip detection in 800ms period:
for approx 200ms
Waveform at event start (approx. 200ms) Waveform at event end (approx. 200ms)
r.m.s variations at the detection of
event start (approx. 1sec)
r.m.s variations at the detection of
event end (approx. 1sec)
Measured
waveform
RMS
waveform
End of transient
Threshold value
Measured
waveform
Start of transient
Duration