7-12
Event Detail, continued
Event text
detail: Sag
Directivity
The 4400 firmware V2.0 and higher is equipped with the algorithm that determines the
origin of a 3-phase voltage sag event. The sag origin or directivity can be Upstream or
Downstream from the monitoring point. The direction is displayed in the Event Text
Detail screen.
Action... Result...
Once events are available for
display, press Detail to display
the functions that can be used to
further analyze the waveform/rms
i.e. the Text button.
Press Text to display the event
threshold values and textual
summary.
• Only events generated by 3-
phase voltage and current
waveforms will include
information on Directivity in
the text summary. Directivity
shows the origin of the sag
whether Upstream or
Downstream from the
monitoring point if the voltage
and current signals are
adequate to detect.
MARK620
MARK621
MARK622
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