ABB RELION 620 Series Technical Manual page 783

1MAC504801-IB E
10.1.1.6
10.1.1.7
10.1.1.8
620 series ANSI
Technical Manual
The naming convention of 8+3 characters is used in COMTRADE file naming. The file
name is composed of the last two octets of the protection relay's IP number and a running
counter, which has a range of 1...9999. A hexadecimal representation is used for the IP
number octets. The appropriate file extension is added to the end of the file name.
Deletion of recordings
There are several ways to delete disturbance recordings. The recordings can be deleted
individually or all at once.
Individual disturbance recordings can be deleted with PCM600 or any appropriate
computer software, which can access the protection relay's C:\COMTRADE folder. The
disturbance recording is not removed from the protection relay's memory until both of the
corresponding COMTRADE files, .CFG and .DAT, are deleted. The user may have to
delete both of the files types separately, depending on the software used.
Deleting all disturbance recordings at once is done either with PCM600 or any appropriate
computer software, or from the LHMI via the Clear/Digital fault recorder menu.
Deleting all disturbance recordings at once also clears the pre-trigger recording in
progress.
Storage mode
The disturbance recorder can capture data in two modes: waveform and trend mode. The
user can set the storage mode individually for each trigger source with the Storage mode
parameter of the corresponding analog channel or binary channel, the Stor. mode manual
parameter for manual trigger and the Stor. mode periodic parameter for periodic trigger.
In the waveform mode, the samples are captured according to the Storage rate and Pre-
trg length parameters.
In the trend mode, one RMS value is recorded for each enabled analog channel, once per
fundamental cycle. The binary channels of the disturbance recorder are also recorded once
per fundamental cycle in the trend mode.
Only post-trigger data is captured in trend mode.
The trend mode enables recording times of 32 * Record length.
Pre-trigger and post-trigger data
The waveforms of the disturbance recorder analog channels and the states of the
disturbance recorder binary channels are constantly recorded into the history memory of
Section 10
Recording functions
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