9.2
SEL-400 Series Relays Instruction Manual Date Code 20171006
Reporting
Data Processing
samples/second, 4000 samples/second, 2000 samples/second, and 1000 samples/
second effective sampling rates for presentation and storage of the high-resolu-
tion raw data COMTRADE format (see Oscillography on page 9.9).
Figure 9.2 shows the path a power system signal received via SV remote data
acquisition takes through relay processing. The received SV messages are first
filtered, decoded, scaled, and resampled. The resampled data then continues
through software filtering and progresses to protection and automation process-
ing. The relay resamples the 4.8 kHz/4 kHz SV messages to 8 kHz analog sam-
ples. This is the tap point for high-resolution raw data captures.
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