Schweitzer Engineering Laboratories SEL-787 - Figure 9.1 Example Event Summary

9.3
Date Code 20081022 Instruction Manual SEL-787 Relay
Analyzing Events
Event Reporting
TRI (Trigger Event Report) Command
The sole function of the TRI serial port command is to generate event reports,
primarily for testing purposes. See TRIGGER Command (Trigger Event
Report) on page 7.38 for more information on the TRI (Trigger Event Report)
command.
Event Summaries
For every triggered event, the relay generates and stores an event summary.
The relay stores the most recent 22 (if event report length setting LER := 15)
or 4 (if LER := 64) event summaries. When the relay stores a new event
summary, it discards the oldest event and event summary if the event memory
is full. Event summaries contain the following information:
➤ Relay and Terminal Identification (RID and TID)
➤ Event number, date, time, event type, and frequency (see
Table 9.1)
➤ The primary magnitudes of winding phase, neutral (if optional
neutral CT is available), and residual currents
➤ The primary magnitudes of the line to neutral voltage (if
DELTA_Y := WYE) or phase-to-phase voltages (if
DELTA_Y := DELTA), optional Voltage Inputs card required
➤ Hottest RTD temperatures, SEL-2600 series RTD Module or
internal RTD card option required
The relay includes the event summary in the event report. The identifiers, date,
and time information are at the top of the event report, and the remaining
information follows at the end (See Figure 9.3). The example event summary
in Figure 9.1 corresponds to the standard 15-cycle event report in Figure 9.3.
=>>SUM <Enter>
SEL-787 Date: 02/14/2008 Time: 13:09:57.353
TRNSFRMR RELAY
Serial No = 000000000000000
FID = SEL-787-X122HR-V0-Z001001-D20080212 CID = 26FF
EVENT LOGS = 1
Event: Diff 87 Trip
Targets 11100000
Freq (Hz) 60.0
Winding One Current Mag
IAW1 IBW1 ICW1 IGW1
(A) 512.0 213.8 215.0 295.00
Winding Two Current Mag
IAW2 IBW2 ICW2 IGW2
(A) 2138.8 2144.4 2141.1 36.40
Neutral Current Mag
IN
(A) 0.60
Voltage Mag
VAB VBC VCA
(V) 13501 13500 13687
=>>
Figure 9.1 Example Event Summary
The relay sends event summaries to all serial ports with setting AUTO := Y
each time an event triggers.
IMPORTANT: Clearing the
HISTORY report with the HIS C
command also clears all event data
within the SEL-787 event memory.
NOTE: Figure 9.3 is on multiple
pages.