ABB RER620, Technical Manual

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Section 8
Recording functions
RER620 415
Technical Manual
user can monitor the time remaining to the next triggering with the
Time to trigger
monitored data which counts downwards.
8.1.2 Length of recordings
The user can define the length of a recording with the Record length parameter. The length
is given as the number of fundamental cycles.
According to the memory available and the number of analog channels used, the digital
fault recorder automatically calculates the remaining amount of recordings that fit into the
available recording memory. The user can see this information with the
Rem. amount
of rec
monitored data. The fixed memory size allocated for the recorder can fit in two
recordings that are ten seconds long. The recordings contain data from all analog and
binary channels of the digital fault recorder, at the sample rate of 32 samples per
fundamental cycle.
The user can view the number of recordings currently in memory with the
Number of
recordings
monitored data. The currently used memory space can be viewed with the
Rec. memory used
monitored data. It is shown as a percentage value.
8.1.2.1 Sampling frequencies
The sampling frequency of the digital fault recorder analog channels depends on the set
rated frequency. One fundamental cycle always contains the amount of samples set with
the
Storage rate parameter. Since the states of the binary channels are sampled once per
task execution of the digital fault recorder, the sampling frequency of binary channels is
400 Hz at the rated frequency of 50 Hz and 480 Hz at the rated frequency of 60 Hz.
Table 377: Sampling frequencies of the digital fault recorder analog channels
8.1.2.2 Uploading of recordings
The relay stores COMTRADE files to the
C:\COMTRADE\
folder. The files can be
uploaded with the PCM tool or any appropriate computer software that can access the
C:\COMTRADE\
folder.
The maximum number of recordings is 100.
Storage rate
(samples per
fundamental
cycle)
Recording
length
Sampling
frequency of
analog
channels, when
the rated
frequency is 50
Hz
Sampling
frequency of
binary
channels, when
the rated
frequency is 50
Hz
Sampling
frequency of
analog
channels, when
the rated
frequency is 60
Hz
Sampling
frequency of
binary
channels, when
the rated
frequency is 60
Hz
32 1* Record
length
1600 Hz 400 Hz 1920 Hz 480 Hz
16 2* Record
length
800 Hz 400 Hz 960 Hz 480 Hz
8 4 * Record
length
400 Hz 400 Hz 480 Hz 480 Hz