ABB Relion REC615, Техническое руководство

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8.2.2.6 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 > Disturbance
records menu. Deleting all disturbance recordings at once also clears the pre-trigger
recording in progress.
8.2.2.7 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 value is recorded for each enabled analog channel, once per
fundamental cycle. The recorded values are RMS values, which are scaled to peak
level. 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.
8.2.2.8 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 the recorder. The user can adjust the percentage of the data duration
preceding the triggering, that is, the so-called pre-trigger time, with the
Pre-trg
length parameter. The duration of the data following the triggering, that is, the
so-called post-trigger time, is the difference between the recording length and the
pre-trigger time. Changing the pre-trigger time resets the history data and the
current recording under collection.
8.2.2.9 Operation modes
Disturbance recorder has two operation modes: saturation and overwrite mode. The
user can change the operation mode of the disturbance recorder with the
Operation
mode parameter.
1MRS758755 C Measurement functions
REC615 & RER615
Technical Manual
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