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Threshold: W7—Threshold for voltage sag and swell.
Half Cycle count: W8 (Voltage Swell: 0; Voltage Sag: 4~200)
2. Logging Events
The event logging feature can log 50000 events. If the 50000 events are full, no
more events will be logged even if the triggering condition happens. The user
must clear the event log, and then the logging will log the new event. When
the log is cleared, the new event will be logged from the rst event happening.
There will be no data loss after the power is o.
3. Event Logging Triggering Conditions
1)Voltage Sag
When any phase of the three phase voltage is lower than the set value (voltage
rated value x threshold %), there will be a voltage sag event. When one phase
voltage sag happens, the other phase will not respond to voltage sag event
logging. Only when all of the phases voltage restore back to normal, a new
voltage sag event will be responded.
2)Voltage Swell
When any phase of the three phase voltage is higher than the set value (voltage
rated value x threshold %), there will be an Voltage Swell event. When one
phase Voltage Swell happens, the other phase will not respond to Voltage Swell
event logging. Only when all of the phases voltage restore back to normal, a
new Voltage Swell event will be responded.
Note:
The following gure depicts how to set the parameters for Power Quality Event
Logging and Waveform Capture. In the parameter settings, Voltage Sag and
Voltage Swell share the same voltage rated value. The parameters for event
logging includes: voltage rated value, voltage sag threshold, voltage sag half
cycle count and voltage swell threshold. Those parameters also t voltage sag
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