Rockwell Automation 1608M MegaDySC User Manual, 208 Volt, One Second Extended Runt - Manual (Page 33)

Rockwell Automation Publication 1608M-UM004A-EN-P - April 2014 33
Display Screen Chapter 6
Voltage Sag Events
A voltage sag is defined as the period when input RMS voltage drops to less than
88.5% of the rated DySC voltage. Details of each voltage sag and corresponding
MegaDySC protection are captured and saved to the voltage sag log.
Voltage Sag Log
The “Voltage Sag Log” screen (See Figure 19 ) displays a list of the last 61 voltage
sags. Reach this screen by pressing “VOLTAGE SAGS” button on the “HOME”
screen.
Figure 19 - Voltage Sag Log
Table 4 - Voltage Sag Log Description
Description Function
# Unique ID within the list (0-60) to identify the voltage sag
Time Start time and date of the voltage sag
Check Mark Denotes the MegaDySC protected the voltage sag
RMS% Worst-case RMS voltage (percent of nominal) across all phases
Duration Duration of the voltage sag
Note: Use the up/down arrows to navigate through the list. Press the “SELECT” button to view additional details about
the voltage sag