Manual

84 Rockwell Automation Publication 1426-UM001F-EN-P - November 2013
Chapter 5 Power Quality Monitoring
Long Duration RMS
Variations (Category 3.0 -
Undervoltage, Overvoltage,
Sustained Interruptions) (M6
model)
A sag or swell with a duration that exceeds one minute is classified as an
undervoltage or overvoltage, respectively. An interruption with a duration that
exceeds one minute is classified as a sustained interruption.
Setup
These Sag and Swell parameters also determine that operation of undervoltage
and overvoltage detection.
• Sag1_Trip_Point_%
• Sag1_Hysteresis_%
• Swell1_Trip_Point_%
• Swell1_Hysteresis_%
Operation
When the duration of a sag or swell event exceeds 60 seconds, the new
classification is recorded in the power quality log with the time stamp of the
original sag or swell event, and the original sag or swell record in the power
quality log is updated with a duration of 60 seconds and its associated waveform
recording.
During an overvoltage or undervoltage event the PowerMonitor 5000 M6 model
records a new sag or swell condition if the voltage crosses a lower sag or higher
swell trip point.
Status
The Status.Alarms Data Table provides the following tags for monitoring of long
duration rms variations.
• IEEE1159_Over_Voltage
• IEEE1159_Over_Voltage_V1
• IEEE1159_Over_Voltage_V2
• IEEE1159_Over_Voltage_V3
• IEEE1159_Under_Voltage
• IEEE1159_Under_Voltage_V1
• IEEE1159_Under_Voltage_V2
• IEEE1159_Under_Voltage_V3
The alarm flags are released when the condition no longer exists.