1MAC050144-MB C
Section 9
Recording functions
615 series ANSI
601
Technical Manual
9.1.1.3
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.
9.1.1.4
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 508: Sampling frequencies of the digital fault recorder analog channels
9.1.1.5
Uploading of recordings
The IED stores COMTRADE files to the
C:\COMTRADE\
folder. The files can be
uploaded with the PCM tool or FTP software that can access the
C:\COMTRADE\
folder.
One complete digital fault recorder 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.
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
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