S&C Instruction Sheet 461-504 91
Informational and Settings Screens
minimum trip setting but the fault duration is not sufcient to cause TCC0 to trip, the
TripSaver II recloser will assume the downline device has operated. The recloser will
switch protection from TCC0 to its Sequence Coordination settings.
If the fault isn’t cleared by the downstream device, the Sequence Coordination curve
will start timing and trip. A Sequence Coordination trip operation will then show as
“SC0” in the event log. See Figure 127. If the fault persists beyond SC0, the TripSaver II
recloser will use the remaining settings in the protection sequence, including TCC1, TCC2,
and TCC3, as programmed. For more information on the Sequence Coordination feature,
see the description on page 55 and in S&C Information Bulletin 461-50, “TripSaver® II
Cutout-Mounted Recloser: Sequence Coordination Application Guide.”
Figure 127. An example of a sequence coordination trip in the Trip Events log.
• LMO. This indicates the vacuum interrupter tripped because of a Local Manual
Open command, and the TripSaver II recloser dropped open.
• Suspicious. This indicates the S&C-determined ag for suspicious malicious local
manual open attempts has been detected. The S&C-determined ag is dened as:
10 consecutive MODE SELECTOR lever operations (moving the lever down and then
back up is counted as two operations) within a 60-second period, when the Local
Manual Open feature is disabled. The logic only monitors the condition when the
recloser is vertical.
Relative Time, DD-HH:MM:SS.000. This indicates the relative time stamp of vacuum
interrupter trip events in the format of days, hours, minutes, seconds and milliseconds.
A TripSaver II recloser has an internal timer that starts when each recloser leaves the
S&C factory. The timer saves a relative time stamp into memory immediately before the
timer stops ve hours after the recloser loses power. The internal timer will start from
this saved time stamp when the TripSaver II recloser is powered up again. See Figure 128.
Figure 128. The column displaying Relative Time timestamp.
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