Siemens 7SJ82 Manual page 108

System Functions
3.4 Fault Recording
Parameter: Storage
•
Recommended setting value (_:2761:131) Storage = always
With the Storage parameter, you define the storage criterion for a fault recording that has already started.
Parameter Value
always
with trip
Parameter: Maximum record time
•
Default setting (_:2761:111) Maximum record time = 5.00 s
With the Maximum record time parameter, you configure the maximum record duration for an individual
fault recording. When the time configured expires, an ongoing fault recording is canceled. This parameter
merely limits the duration of the fault recording. It does not affect the logging of faults in the fault log.
Parameter: Pre-trigger time
•
Recommended setting value (_:2761:112) Pre-trigger time = 0.50 s
With the Pre-trigger time parameter, you configure the pre-trigger time for an individual fault recording.
The set pre-trigger time is prepended to the actual recording criterion for the fault recording.
Parameter: Post-trigger time
•
Recommended setting value (_:2761:113) Post-trigger time = 0.50 s
With the Post-trigger time parameter, you configure the post-trigger time for an individual fault
recording. The post-trigger time that has been configured is added to the actual recording criterion for the
fault recording after the dropout.
The following table shows how the setting range changes for the Post-trigger time parameter
depending on the Sampling frequency.
Sampling Frequency
8 kHz
4 kHz
2 kHz
1 kHz
Parameter: Manual record time
•
Recommended setting value (_:2761:116) Manual record time = 0.50 s
With the Manual record time parameter, you set the length of a recording if the fault recording is acti-
vated dynamically (edge-triggered) via a separately configured input signal
In this case, pre-trigger and post-trigger times do not take effect.
Parameter: Sampling frequency
•
Recommended setting value (_:2761:140) Sampling frequency = 8 kHz
With the Sampling frequency parameter, you define the sampling frequency of fault records that you
want to download via DIGSI 5. Possible setting values are 8 kHz, 4 kHz, 2 kHz, and 1 kHz.
Parameter: Sampl. freq. IEC61850 rec.
•
Recommended setting value (_:2761:141) Sampl. freq. IEC61850 rec. = 8 kHz
108
Description
Each fault recording that has been started is saved.
If at least one protection function issues an operate indication during the
record time, any fault recording that has been started will be saved.
Setting Range for the Post-trigger time Parameter
0.05 s to 4 s
0.05 s to 8 s
0.05 s to 16 s
0.05 s to 24 s
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SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017