Siemens SIPROTEC 5 Manual page 257

a Trigger rising edge: Start of the recording of the pre-trigger time and the retrigger blocking time,
as well as with the 1st trigger event start of the maximum record time
b Trigger falling edge: Start of the post-trigger time
c End of the retrigger blocking time
d End of the post-trigger time
e End of the maximum record time
t Time line
When a trigger event occurs, the start trigger (a) trips a fault record.
The retrigger blocking time is ineffective with both trigger events because the duration of the failure is longer
than the configured retrigger blocking time.
Trigger events can result in a recording or in extending the recording. After expiration of this post-trigger time,
the recording continues, because the 2nd trigger event is already detected and recorded.
The configured maximum record time has no influence on the recording because it is longer than all profiles.
Repeated Triggers
To avoid repeated triggers of the device due to limit violations within the shortest time, you can configure a
retrigger block.
[dwtrigka-140213-01.tif, 1, en_US]
Figure 7-39
a Trigger rising edge: Start of the recording of the pre-trigger time and the retrigger blocking time,
as well as with the 1st trigger event start of the maximum record time
b Trigger falling edge
c End of the repeated retrigger blocking time
d End of the maximum record time
t Time line
When a trigger event occurs, the start trigger (a) trips a fault record. The recording is done in the same way as
in the previous example.
If another limit violation of the same channel (d) occurs within the retrigger blocking time, this does not
extend the fault record but rather only restarts the channel-specific retrigger blocking time.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Example 1: Repeated Triggers in the Same Channel
Fault Recorder
7.2 Function-Group Type Recorder
257