P.8.33
Date Code 20151029 Protection Manual SEL-411L Relay
Oscillography, Events, and SER
Sequential Events Recorder (SER)
Figure 8.19 Sample Compressed ASCII SER Report
SER File Download
You can also download the SER data as a file from the relay. Use a terminal
emulation program with file transfer capability. At an Access Level 1 prompt
or higher type FILE READ REPORTS SER.TXT <Enter>. Start the
terminal download routine to store the file on your computer. If you want the
Compressed ASCII file, type FILE READ REPORTS CSER.TXT
<Enter>.
Setting SER Point
You program the relay elements that trigger an SER record. You can select as
many as 250 elements. These triggers, or points, can include control input and
control output state changes, element pickups and dropouts, recloser state
changes, and so on. Use the SET R command from a terminal, or use
ACSELERATOR QuickSet Report branch of the Settings tree view to enter
SER Points.
Use the text-edit line mode settings method to enter or delete SER elements.
To set an SER element, enter the five items of this comma-delimited string (all
but the first parameter are optional): Relay Word Bit, Reporting Name, Set
State Name, Clear State Name, HMI Alarm.
The relay defaults to the element name when you do not provide a reporting
name. The default names for the set and clear states are Asserted and
Deasserted, respectively. By default, SER Points are not configured for HMI
alarm display. The relay always creates an SER record for power-up, relay
enable and relay disable, any group change and settings change, diagnostic
restart, and memory overflow.
Automatic Deletion and Reinsertion
The SER also includes an automatic deletion and reinsertion function. The
relay automatically deletes oscillating SER items from SER recording. This
function prevents overfilling the SER buffer with “chattering” information.
Set Report setting ESERDEL (Enable SER Delete) to Y to enable this
function, and select values for the setting SRDLCNT (SER Delete Count) and
the setting SRDLTIM (SER Delete Time) that mask the chattering SER
element. The relay removes an item from all SER recordings once a point has
changed state more than SRDLCNT times in an SRDLTIM period. Once
deleted from SER recording, the relay ignores the item for a 10 • SRDLTIM
period. At the end of this period, the relay checks the chatter criteria and, if the
point does not exceed the criteria, the relay automatically reinserts the item
into SER recording. To see a list of deleted SER points, use the SER D
command.
Signal Profiling
Use the analog signal profiling function to record and track values of up to
20 analog quantities. This function provides data in CASCII that is compatible
to import directly into applications like spreadsheets. Specify the specific
analog quantities for profiling with the SPAQ Report settings. At the data
"RID","SID","FID","03e2"
"Relay 1","Station A","SEL-411L-R101-V0-Z001001-D20010315","0dfc"
"#","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","ELEMENT","STATE","0FC8"
1,3,15,2001,00,32,00,114,"GROUND_O/C_1_LINE_1","51S1_DROPOUT","09D2"
2,3,15,2001,00,32,00,114,"GROUND_O/C_1_LINE_1","51S1_RESET","08E7"
3,3,15,2001,00,30,03,221,"GROUND_O/C_1_LINE_1","51S1_TIMEOUT","09B0"
4,3,15,2001,00,30,00,021,"GROUND_O/C_1_LINE_1","51S1_PICK_UP","097B"
5,3,15,2001,00,00,00,222,"Relay","Enabled","09BA"
6,3,15,2001,00,00,00,004,"Power-up","Group 1","0A0A"
Report Header
SER Data (6 records)
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