9.27
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Reporting
Event Reports, Event Summaries, and Event Histories
Event History
The event history gives you a quick look at recent relay activity. The relay labels
each new event with a unique number from 10000 to 42767. (At 42767 the relay
returns to 10000 for the next event number and then continues to increment.) See
Figure 9.13 for a sample event history.
The event history typically contains the following:
➤ Standard report header
➢ Relay and terminal identification
➢ Date and time of report
➤ Event number
➤ Event date and time
➤ Event type
➤ Location of fault (if applicable)
➤ Maximum phase current from summary fault data
➤ Active group at the trigger instant
➤ Targets
Figure 9.13 is a sample event history from a terminal.
The event types in the event history are the same as the event types in the event
summary.
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 com-
mand).
Figure 9.13 Sample SEL-411L Event History
Event
Number
Event
Type
Fault
Location
Active
Group
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
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