Sampling Frequencies - ABB RELION REX640 Technical Manual

1MRS759142 C
8.2.3.4
8.2.3.5
REX640
Technical Manual
The maximum number of recordings is 100.

Sampling frequencies

The sampling frequency of the disturbance recorder analog channels depends on the
set rated frequency. One fundamental cycle always contains the number of samples set
with the Storage rate parameter. Since the states of the binary channels are sampled
once per task execution of the disturbance 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 1281: Sampling frequencies of the disturbance recorder analog and binary channels
Storage rate Recording
(samples per length
fundamental
cycle)
32 1 ⋅ Record
length
16 2 ⋅ Record
length
8 4 ⋅ Record
length
Uploading of recordings
The protection relay stores COMTRADE files to the C:\COMTRADE folder. The files
can be uploaded with PCM600 or any appropriate computer software that can access
the C:\COMTRADE folder.
One complete disturbance recording consists of two COMTRADE file types: the
configuration file and the data file. The file name is the same for both file types. The
configuration file has .CFG and the data file .DAT as the file extension.
Measurement functions
Rated frequency = 50 Hz
Sampling Sampling
frequency of frequency of
analog binary channels
channels
1600 Hz 400 Hz
800 Hz 400 Hz
400 Hz 400 Hz
Section 8
Rated frequency = 60 Hz
Sampling Sampling
frequency of frequency of
analog binary channels
channels
1920 Hz 480 Hz
960 Hz 480 Hz
480 Hz 480 Hz
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