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SEL-400 Series Relays Instruction Manual Date Code 20171006
Synchrophasors
PMU Recording Capabilities
ment data as a C37.118 binary format file that can be retrieved from the relay
using File Transfer Protocol. Synchrophasor data are recorded into a file with
extension *.PMU.
SPMDR
The SPMDR setting provides a means for selecting any one of the enabled data
configuration 1–NUMPHDC for synchrophasor data recording.
CONAM
The CONAM setting provides a means for inserting the company name into the
recorded synchrophasor data file name. The CONAM setting is three characters
long. The settings allows all printable characters except “ / \ < > * | : ; [ ] $ % { }.
PMLER
PMLER sets the total length of the synchrophasor data recording, in seconds.
The PMLER time includes the PMPRE time. For example, if PMLER is set for
30 seconds of PMU recorded data, and PMPRE is set for 10 seconds of pretrigger
data, the final recording will contain 10 seconds of pretrigger data and 20 seconds
of triggered data for a total report time of 30 seconds.
PMPRE
The PMPRE setting sets the length of the pretrigger data within the synchropha-
sor data recording. The PMPRE data begins at the PMTRIG point of the record-
ing, and extends back in time (previous time to the trigger event) for the
designated amount of time.
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