68
UMG 509
Events
Events are threshold value violations of set threshold
values for current and voltage.
Here, threshold values are compared with the full-
wave effective values for current and voltage from
the measurement channels. The event record consists
of a mean value, a minimum or maximum value, a start
time and an end time.
Fig. Shows the full wave effective values for an event.
• Monitoring of the threshold values can be switched
off (Off/Manual).
• Threshold values must be set as a percentage
of the nominal value.
• Threshold values can be set for excess voltage,
undervoltage and overcurrent.
• If an event has occurred, the corresponding measured
value is recorded with the set pre-run and after-run
periods (respectively 0..1000 full waves).
• Event records are configured with the GridVis
and displayed with the event browser.
Limit value
Measured
value
Vollwellen-
effektivwert
Limit value
violations
before the
lead time
End time
Limit value violations
before the follow-up time
Event
Follow-up timeLead time
Start time event
(Trigger time)
Event record
Pre-run
After-run
• An event describes a fault due to undervoltages/
overvoltages, voltage loss, overcurrent, overfrequency/
underfrequency and rapid frequency changes
• An event is triggered if there is an uninterrupted
threshold value violation within the lead time.
The event is ended if there is no threshold value
violation within the after-run time.
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