9.15
Date Code 20100129
Instruction Manual
SEL-751A Relay
Analyzing Events
Sequential Events Recorder (SER) Report
Sequential Events Recorder (SER) Report
The SER report captures relay element state changes over 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
Settings SER1 through SER4 are used 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:
Relay Powered Up
.
.
.
Relay Settings Changed
Each entry in the SER includes the SER row number, date, time, element
name, and element state.
SER Aliases
You may rename as many as 20 of the SER trigger conditions 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 will show the date and
time of FP_LOCK PICKUP. When Relay Word bit PB02 is deasserted, the
SER report will show 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 4.123
for additional details.
SER Command (Sequential Events Recorder Report) on page 7.35
for
details on retrieving and clearing SER reports with the
SER
command.
Example SER Report
The example SER report in
includes records of events that occurred
before the beginning of the event summary report in
.
=>
SER 8 <Enter>
SEL-751A Date: 02/28/2007 Time: 16:34:28
FEEDER RELAY Time Source: Internal
Serial No = 2007XXXXXXXXXXX
FID = SEL-751A-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 9.6
Example Sequential Events Recorder (SER) Event Report
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