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7
7.2 Fault Recorders
70
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
7.2.1.2.1 Analog Signal Triggers
The TAR processes analog input signals (direct and alternating signals) in different ways:
The level and gradient trigger can also be applied to analog signals.
Retrigger blocking for analog signals
To avoid repeated triggering of the device due to limit value violations within the shortest time, a
retrigger blocking can be parameterized.
The retrigger blocking time for analog signals is started simultaneously with the recording time
and acts for each individual channel. If a limit value violation occurs again for the same channel
within the retrigger blocking time, this will not extend the fault record but only restart the channel-
specific retrigger blocking time (see figure 7-8). All other channels can start retriggering (see
figure 7-9). The retrigger blocking time can be activated separately for every analog input.
Figure 7-8 Trigger 2 does not extend the recording time due to retrigger blocking
Table 7-13 Options of analog signal triggering
Measured value Triggering
AC values
DC values
Half-wave rms value
Arithmetic mean of a nominal
cycle
Note
If the retrigger blocking time is defined longer than the recording, time no trigger events are
recognized during this time.
Fault record
Trigger 1
Channel A
Trigger 2
Prefault
time
Recording time
Retrigger
blocking time Retrigger blocking
time (restart)
t
t
Recording of fault record