Application And Setting Notes I Rms Trig - Siemens SIPROTEC 5 Manual

A hysteresis of 2% of the setting value is preset for the level and gradient triggers. This is equal to 0.980 p.u.
for the max. and gradient trigger and to 1.020 p.u. for the Min. trigger.
Exceeding or dropping below one of the set threshold values leads to trigger tripping. The trigger tripping is
however effective on the recorders only if you have routed the trigger to the recorder.
NOTE
i
i
The thresholds can be set in the primary, secondary, and percentage view. All subsequent setting values
are shown in the secondary view.
Function Blocks
Function blocks of the Current trigger function:
•
Trig. I Fund.: Setting of the trigger for the fundamental-component value of the measured current
•
Trig. I RMS: Setting of the trigger for the RMS value of the measured current
NOTE
i
i
The thresholds can be set in the primary, secondary, and percentage view. All subsequent setting values
are shown in the secondary view.
Mode
The trigger is switched on, off, or in test mode. In test mode, the fault records are marked with a test flag.
You can find more information on the mode in chapter
DIGSI 5 .
Max. Trigger Active/Min. Trigger Active
With the parameters Max. trigger active and Min. trigger active, you define whether the respec-
tive level trigger is active or inactive.
Max. Trigger/Min. Trigger
With the parameters Max. trigger and Min. trigger, you define from which threshold value the acti-
vated level trigger starts a fault record.
dM/dt Rise Active - dM/dt Drop Active
With the parameters dM/dt rise active and dM/dt drop active, you define whether the respective
gradient trigger is active or inactive.
Filter Time
With the Filter time parameter, you define the number of periods with which the gradient is determined.
Gradient Trigger for Rising and Dropping Gradients of the Current
With the parameters dM/dt rise (/Filter time) and dM/dt drop (/Filter time), you define
from which threshold value the parameterized filtering time starts a fault record.
7.4.2.4

Application and Setting Notes I RMS Trig

Parameter: Mode
•
Default setting (_:9781:1) Mode = off
With the Mode parameter, you activate the trigger for normal operation (On) or for the test mode (Test).
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
7.1.3 Step 2: Setting the Parameters and Routing in
Fault Recorder
7.4 Trigger Functions 1-Phase
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