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4 Measurands and Recording
4.1 Measuring and Recording System
36 SENTRON PAC5100/5200, 7KM5212/5412, Device Manual
E50417-H1040-C568-A1, Edition 03.2015
4.1.2.5 Fault Recorder
After a trigger has been activated, the fault recorder records the sampled values of voltage curves and/or cur-
rent curves. A trigger is activated when a measured value exceeds or falls short of a parameterized threshold
value. For this purpose, the trigger function block permanently compares the measured V
rms
(1/2) values with
declared input voltage Udin or I
rms
(1/2) with rated current I
rated
. The function block starts a fault record (sam-
pled values) as soon as parameterized threshold values are violated in either direction. The fault record is writ-
ten to the device-internal memory card for subsequent evaluation.
The fault recording ends is according to the configured recording duration.
The triggers for voltage and current monitoring can be parameterized separately and can be switched on and
off individually. No recording is initiated when the trigger is switched off.
The lower and upper threshold values can be parameterized in percent or numerically.
Figure 4-7 Recording of the fault recorder, example
The fault recorder records 2048 sampled values per 10/12 cycles, approximately 204 samples per cycle.
100
U
din
[%]
t [s]
108
92
110
90
Start
recording
t [s]
Hysteresis
Hysteresis
Pre-
recording
time
Recording of the disturbance
in the adjusted recording time
Start
recording
Stop recording
after the end of recording time
Recording of the disturbance
in the adjusted recording time
Adjusted upper
limiting value of Udin
Adjusted lower limiting
value of Udin
Stop recording
in the adjusted recording time
Legende (example ):
Complete duration of the recording : 3.0 s
Pre-trigger ratio (adjusted pre -recording time ): 20 % of the adjusted total duration of recording
< 3 s
3 s
Total duration of recording of
sampled values
Pre-
recording
time
Total duration of recording of
sampled values