With the dM/dt rise active parameter, you activate the gradient trigger in order to monitor the positive
gradients of the voltage in the positive-sequence system using the set filtering time (input in periods).
Parameter Value Description
yes
The positive gradient of the voltage in the positive-sequence system is
monitored.
no
The positive gradient of the voltage in the positive-sequence system is not
monitored.
The hysteresis is preset at the factory to 0.980 p.u. (equal to 2 %) of the parameter dM/dt rise (/Filter
time) and can be adjusted.
Parameter: dM/dt Drop Active - dM/dt Drop (/Filter Time) - dM/dt Drop Hysteresis - Filter Time
•
Default setting (_:9661:104) dM/dt drop active = no
•
Default setting (_:9661:108) dM/dt drop (/Filter time) = 11.547 V
•
Default setting (_:9661:116) dM/dt drop hysteresis = 0.980 p.u.
•
Default setting (_:9661:112) Filter time = 2 periods
With the dM/dt drop active parameter, you activate the gradient trigger in order to monitor the negative
gradients of the voltage in the positive-sequence system using the set filtering time (input in periods).
Parameter Value Description
yes
The negative gradient of the voltage in the positive-sequence system is
monitored.
no
The negative gradient of the voltage in the positive-sequence system is not
monitored.
The hysteresis is preset at the factory to 0.980 p.u. (equal to 2 %) of the parameter dM/dt drop (/Filter
time) and can be adjusted.
Application and Setting Notes - V2 Trigger (Negative-Sequence System)
Parameter: Mode
•
Default setting (_:9691:1) Mode = off
With the Mode parameter, you activate the trigger for normal operation (On) or the test mode (Test).
Parameter Value
Description
on
The function block V2 Trigger is activated and the voltage in the negative-
sequence system is monitored on the basis of the set trigger parameter.
off
The function block V2 Trigger is deactivated.
test
The function block V2 Trigger is activated for test purposes.
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting (_:9691:101) Max. trigger active = yes
•
Default setting (_:9691:105) Max. trigger = 69.284 V
•
Default setting (_:9691:113) Max. trigger hysteresis = 0.980 p.u.
With the Max. trigger active parameter, you activate the level trigger in order to monitor in the nega-
tive-sequence system the voltage for exceeding the set values.
Parameter Value
Description
yes
The voltage in the negative-sequence system is monitored for overvoltage.
no
The voltage in the negative-sequence system is not monitored for over-
voltage.
7.5.1.8
Fault Recorder
7.5 Trigger Functions 3-Phase
SIPROTEC 5, Fault Recorder, Manual 307
C53000-G5040-C018-5, Edition 11.2017
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