Application And Setting Notes Trig V Rms (Rms Value) - Siemens SIPROTEC 5 Manual

Fault Recorder
7.5 Trigger Functions 3-Phase
Parameter: -dM/dt active/- dM/dt/-dM/dt hysteresis
•
Default setting (_:9571:104) -dM/dt active = no
•
Default setting (_:9571:108) -dM/dt (Non-phs sel.) = 20.000 V
•
Default setting (_:9571:127) -dM/dt phs A(AB) = 20.000 V
•
Default setting (_:9571:128) -dM/dt phs B(BC) = 20.000 V
•
Default setting (_:9571:129) -dM/dt phs C(CA) = 20.000 V
•
Default setting (_:9571:116) -dM/dt hysteresis = 0.980 p.u.
•
Default setting (_:9571:112) Filter time = 2 periods
With the -dM/dt active parameter, you activate the gradient trigger in order to monitor the negative gradi-
ents of the voltage of the fundamental component using the set filtering time (input in periods).
Parameter Value
yes
no
If the gradient trigger does not operate phase-selectively, the set threshold value of the parameter -dM/dt
(Non-phs sel.) applies to all phases.
If the gradient trigger operates phase-selectively, set the threshold values for the gradient trigger separately
for each phase. Then, the parameters -dM/dt phs A(AB), -dM/dt phs B(BC), and -dM/dt phs C(CA)
are effective.
The hysteresis is preset at the factory to 0.980 p.u. (equal to 2 %) of the parameter -dM/dt (Non-phs
sel.) and can be adjusted.
7.5.1.5

Application and Setting Notes Trig V RMS (RMS Value)

Parameter: Mode
•
Default setting (_:9601:1) Mode = off
With the Mode parameter, you activate the trigger for normal operation (On) or the test mode (Test).
Parameter Value
on
off
test
Parameter: Measured value
•
Default setting (_:9601:9) Measured value = phase-to-phase
With the Measured value parameter, you define independently of the connection type, whether to trigger
on phase-to-phase or phase-to-ground variables.
Parameter Value
phase-to-ground
phase-to-phase
Parameter: Phase-selective
•
Default setting (_:9601:117) Phase-selective = no
With the Phase-selective parameter, you define whether you want to set the threshold values of the level
triggers and of the gradient trigger phase-selectively or not.
302
Description
The negative gradient of the voltage of the fundamental component is
monitored.
The negative gradient of the voltage of the fundamental component is not
monitored.
Description
The function block Trig. V RMS 1 is activated and the RMS value of the
voltage is monitored on the basis of the set trigger parameter.
The function block Trig. V RMS 1 is deactivated.
The function block Trig. V RMS 1 is activated for test purposes.
Description
The triggering is done on the basis of phase-to-ground variables.
The triggering is done on the basis of phase-to-phase variables.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017