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7
7.2 Fault Recorders
64
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
7.2 Fault Recorders
Memory areas are reserved on the SIMEAS R-PMU flash disk for the TAR and TPR records (see
chapter 12.6 for parameterization). Each record is written to a single file. The files are stored in
ring buffer mode. If the total of files equals to 90% of the memory reserved, the oldest recordings
will be deleted, thus ensuring that the occupancy level is no more than 80%.
7.2.1 Transient Analog Recorder (TAR)
The use of the Transient Analog Recorder (TAR) enables the analysis of transient events (high-
frequency interferences in the power supply system, e. g., caused by switching operations) and
the behaviour of protection devices. Possible applications are described in chapter 2,
Appli-
cations,
of this manual.
The TAR records the curves for voltages, currents, process and binary signals in the form of
sample values when a fault occurs. For this purpose, the user defines trigger limits and recording
times using the OSCOP P parameterization software. The input signals are analyzed according
to the preset trigger conditions and recorded if the limit values are exceeded or not reached. The
fault record contains the prefault time, the trigger time and the recorded fault. The trigger cause
is also stored.
The following trigger functions can be parameterized for the Transient Analog Recorder:
‰
Level trigger Min/Max
‰
Gradient trigger
‰
Binary trigger
‰
Logical trigger
‰
Cross trigger
‰
Manual trigger
‰
External trigger
‰
Network trigger
The fault records are stored on the mass storage device of the SIMEAS R-PMU. The maximum
memory space on the storage device for storing the fault records is defined in the parameteri-
zation. Once 90% of the parameterized memory capacity have been reached, the oldest
recordings will be deleted, thus ensuring that the occupancy level is no more than 80%. The size
of the mass storage device ensures that up to several hundred fault records can be stored
depending on the configuration.
Note
Records have to be transferred to OSCOP P cyclically to avoid the loss of fault recorder data.
For more information, refer to the OSCOP P manual.