Date Code 20010719 701 Motor Protection Relay
Event Analysis
Sequential Events Recorder (SER) Report
9.13
Sequential Events Recorder (SER) Report
SER Triggering
The relay stores an entry in the SER report for a change of state of any one of the
elements listed in the SER trigger setting as outlined in Section 4: Settings Calculation.
The relay adds a message to the SER to indicate power up or settings change
conditions:
Relay newly powered up or settings changed
Each entry in the SER includes SER row number, date, time, element name or
defined alias, and element state.
SER Trigger Condition Aliases
You may rename any of the SER trigger conditions using the SEL-701 Relay
ALIAS settings. The relay permits up to 20 aliases to be assigned to conditions that
trigger SER row entries. For instance, the factory default logic settings define contact
input IN5 for operation as an Emergency Restart input. Factory default alias setting 15
renames input IN5 for reporting in the SER:
ALIAS15 =IN5 EMERGNCY_RSTART PICKUP DROPOUT
When input IN5 is asserted, the SER report will show the date and time of
EMERGNCY_RSTART PICKUP. When input IN5 is deasserted, the SER report will
show the date and time of EMERGNCY_RSTART DROPOUT. With this and other
alias assignments, the SER record is easier for the operator to review. See Section 4:
Settings Calculation for additional details regarding the alias settings.
Retrieving SER Reports
The relay saves the latest 512 rows of the SER report in nonvolatile memory.
Row 1 is the most recently triggered row and Row 512 is the oldest. Use the serial port
SER command to view the SER report by date or SER row number as outlined in the
examples shown in Ta ble 9.6 .
Table 9.6 Re triev in g SER Reports
Table 9.6 Retrieving SER Reports
Example
SER Serial
Port Commands
Format
SER
If you enter the SER command with no numbers following it,
the relay displays all available rows, up to row number 512.
The rows display with the oldest row at the beginning (top) of
the report and the newest row (Row 1) at the end (bottom) of
the report. Chronological progression through the report is
down the page and in descending row number.
(Continued)
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