P.8.29
Date Code 20151029 Protection Manual SEL-411L Relay
Oscillography, Events, and SER
Event Reports, Event Summaries, and Event Histories
Figure 8.16 Sample Event History
Fault location data can be indeterminate (for example, when you trigger an
event and there is no fault on the power system). If this is the case, the relay
displays
$$$$.$$ for the Location entry in the event history. You will also see
the
$$$$.$$ display if the fault location enable setting EFLOC is N.
The event types in the event history are the same as the event types in the event
summary (see Table 8.7 for event types).
The event history report indicates events stored in relay nonvolatile memory.
The relay places a blank row in the history report output; items that are above
the blank row are available for viewing (use the EVE and CEV commands).
Items that are below the blank row are no longer in relay memory; these
events appear in the history report to indicate past power system performance.
The relay does not ordinarily modify the numerical or time order in the history
report. However, if an event report is corrupted (power was lost during
storage, for example), the relay lists the history report line for this event after
the blank row.
Viewing the Event History
Access the history report from the communications ports and communications
cards. View and download history reports from Access Level 1 and higher.
You can also clear or reset history data from Access Levels 1 and higher. You
can independently clear/reset history data at each communications port so that
you and users at other ports (SCADA, Engineering, etc.) can retrieve complete
history reports. You can also clear all history data from all ports (with the HIS
CA and HIS RA commands).
Use the HIS command from a terminal to obtain the event history. You can
view event histories by date or by date range, or you can specify the number of
the most recent events that the relay returns. See HISTORY on page P.15.27
for information on the HIS command. Table 8.9 lists the HIS commands.
Relay 1 Date: 03/16/2001 Time: 11:57:27.803
Station A Serial Number: 2001001234
# DATE TIME EVENT LOCAT CURR GRP TARGETS
10007 03/15/2001 23:30:49.026 BCG T 48.17 8892 1 INST TIME ZONE_1 B_PHASE
10006 03/15/2001 07:15:00.635 ABC T 22.82 8203 1 INST ZONE_1 A_PHASE bk1rs
10005 03/15/2001 06:43:53.428 TRIG $$$$.$$ 0 1
Event
Number
Fault
Location
Event
Type
Active
Group
NOTE: The relay displays the
traveling wave information in the
LOCAT field if the fault location
method (FLM) is traveling wave (TW).
If FLM is not TW, then the relay
displays the results of the impedance-
based fault location calculations.
Table 8.9 HIS Command (Sheet 1 of 2)
Command Description
HIS Return event histories with the oldest at the bottom of the list and the
most recent at the top of the list.
HIS k Return the k most recent event summaries with the oldest at the
bottom of the list and the most recent at the top of the list.
HIS date1 Return the event summaries on date date1
a
.
HIS date1 date2 Return the event summaries from date1 to date2, with date1 at the
bottom of the list and date2 at the top of the list.
HIS C Clear all event data on the present port.
HIS R Clear all event data on the present port.
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