10.37
Date Code 20170927 Instruction Manual SEL-751 Relay
Analyzing Events
Sequential Events Recorder (SER) Report
Sequential Events Recorder (SER) Report
The SER report captures relay element state changes during an extended
period. SER report data are useful in commissioning tests and root-cause
analysis studies. SER information is stored when state changes occur. The
report records the most recent 1024 state changes if a relay element is listed in
the SER trigger equations.
SER Triggering
Use settings SER1 through SER4 to select entries in the SER report. To
capture relay element state changes in the SER report, the relay element name
must be programmed into one of the four SER trigger equations. Each of the
four programmable trigger equations allows entry of as many as 24 relay
elements; the SER report can monitor a total of 96 relay elements.
The relay adds a message to the SER to indicate power up or settings change
conditions:
Each entry in the SER includes the SER row number, date, time, element
name, and element state.
SER Aliases
You can rename as many as 20 of the SER trigger conditions by using the
ALIAS settings. For instance, the factory-default alias setting 2 renames Relay
Word bit PB02 for reporting in the SER:
ALIAS2:= PB02 FP_LOCK PICKUP DROPOUT
When Relay Word bit PB02 is asserted, the SER report shows the date and
time of FP_LOCK PICKUP. When Relay Word bit PB02 is deasserted, the
SER report shows the date and time of FP_LOCK DROPOUT. With this and
other alias assignments, the SER record is easier for the operator to review.
See Relay Word Bit Aliases on page 4.206 for additional details.
See SER Command (Sequential Events Recorder Report) on page 7.46 for
details on retrieving and clearing SER reports with the SER command.
Example SER Report
The example SER report in Figure 10.17 includes records of events that
occurred before the beginning of the event summary report in Figure 10.3.
Relay Powered Up
.
.
.
Relay Settings Changed
NOTE: A file containing and SER
report can be extracted using the FILE
command (see Section 7:
Communications), the Ethernet File
Transfer Protocol (FTP), or the IEC-
61850 Manufacturing Messaging
Specification (MMS). To transfer files
using MMS, set EMMSFS to Y.
=>SER 8 <Enter>
SEL-751 Date: 02/28/2007 Time: 16:34:28
FEEDER RELAY Time Source: Internal
Serial No = 2007XXXXXXXXXXX
FID = SEL-751-R100-V0-Z001001-D20070410 CID = 5052
# DATE TIME ELEMENT STATE
8 02/28/2007 13:54:09.602 51P1P Asserted
7 02/28/2007 13:54:09.602 51AP Asserted
6 02/28/2007 13:54:10.003 51P1T Asserted
5 02/28/2007 13:54:10.003 TRIP Asserted
4 02/28/2007 13:54:10.219 51P1P Deasserted
3 02/28/2007 13:54:10.219 51AP Deasserted
2 02/28/2007 13:54:10.236 51P1T Deasserted
1 02/28/2007 13:54:10.511 TRIP Deasserted
=>
Figure 10.17 Example Sequential Events Recorder (SER) Event Report
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