30 S&C Instruction Sheet 1041-540
Overcurrent Fault Protection
Click the
Overcurrent Fault
button on any screen to open the
OVERCURRENT FAULT
MENU
screen, and then click the
Fault Magnitudes
button.
Fault Magnitude and
Duration Log
Figure 6. The
OVERCURRENT FAULT: Fault Magnitudes
screen.
The
OVERCURRENT FAULT: Fault Magnitudes
screen shows a chronological listing of
peak magnitude and duration data for overcurrent fault events. See Figure 6. The record
for each event includes the date, time, phase, magnitude, and fault duration.
The log can hold information for 16 events. Once the log is full, each new event over-
writes the oldest event in the log. To find the most recent event, look for the message
with a timestamp that is older than the time for the message above it.
The screen includes the following fields:
Date/Time……MSec
This is the time (to the nearest 6.25 milliseconds) when the event began. The switch
control logs each event when it ends.
Phase
This is the phase, and switch if applicable, on which the overcurrent fault occurred, for
example, A2, C1, or G2.
Mag. (Amps)
This is the peak (maximum) overcurrent fault magnitude during the event. This is
displayed as an RMS, asymmetric number.
Duration (Sec)
This is the duration of the overcurrent fault event. The value is displayed in units of
seconds, with resolution to the nearest 0.00625 seconds (6.25 milliseconds). The maximum
recorded fault duration is 409.6 seconds (6.82 minutes). Any fault that lasts longer than
that is recorded as 409.6 seconds.