Siemens 7SJ82 Manual page 105

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Figure 3-35
With the Fault recording parameter, you specify the start criterion of the recording.
You can set the following values:
•
with pickup:
The fault recording records the complete fault until dropout. The resulting pickup signals of all function
groups are taken into account.
•
with pickup & AR cyc.:
In connection with an active automatic reclosing function (internal/external), the fault recordings record
the fault including the short and long interruptions (automatic reclosing cycles).
•
user-defined:
With this setting value, you can individually specify the recording criterion for the fault recording in
DIGSI 5. Function-specific recording criteria can be realized in this way.
If a recording criterion reoccurs during the pickup time and post-trigger time, the recording which is currently
active is extended to include a new post-trigger time.
For a sampling frequency of 8 kHz and 24 analog channels to be recorded, the duration of one individual fault
recording can be up to 20 s.
The maximum record duration can be limited by the Maximum record time parameter.
In addition to starting the fault recording via the pickup, the following alternatives are possible:
•
Externally via binary input signal
without fault recording by an object transferred via a GOOSE message)
•
By way of a configurable input signal
length (parameter Manual record time).
•
With DIGSI 5, you can start test fault records with a fixed length of 1 s.
•
With a command from a central device via an existing communication connection (IEC 61850,
IEC 60870-5-103)
NOTE
i i
If a pickup signal is present continuously, the fault record is closed after the Maximum record time
expires and the fault recording is not restarted!
Saving the Recording
Not every fault recording that is started actually needs to be saved. With the Storage parameter, you specify
whether or not you want to save the fault recording that has started. You can also save only fault data for
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
Example of a Fault Recording
>External start (for example, from an external protection device
>Manual start , you can start fault records with a configurable
System Functions
3.4 Fault Recording
105