Siemens SIPROTEC 5 Manual page 340

Fault Recorder
7.5 Trigger Functions 3-Phase
Parameter Value
negative
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting (_:9961:101) Max. trigger active = yes
•
Default setting (_:9961:105) Max. trigger = 207.846 var
•
Default setting (_:9961:113) Max. trigger hysteresis = 0.980 p.u.
With the Max. trigger active parameter, you activate the level trigger in order to monitor the sum reac-
tive power for exceeding the set values.
Parameter Value
yes
no
The hysteresis is preset at the factory to 0.980 p.u. (equal to 2 %) of the parameter Max. trigger and can
be adjusted.
Parameter: Min. Trigger Active/Min. Trigger/Min. Trigger Hysteresis
•
Default setting (_:9961:102) Min. trigger active = yes
•
Default setting (_:9961:106) Min. trigger = 138.564 var
•
Default setting (_:9961:114) Min. trigger hysteresis = 1.020 p.u.
With the Min. trigger active parameter, you activate the level trigger in order to monitor the sum reac-
tive power for dropping below the set values.
Parameter Value
yes
no
The hysteresis is preset at the factory to 1.020 p.u. (equal to 2 %) of the parameter Min. trigger and can
be adjusted.
Parameter: dM/dt Rise Active - dM/dt Rise (/Filter Time) - dM/dt Rise Hysteresis - Filter Time
•
Default setting (_:9961:103) dM/dt rise active = no
•
Default setting (_:9961:107) dM/dt rise (/Filter time) = 34.641 var
•
Default setting (_:9961:115) dM/dt rise hysteresis = 0.980 p.u.
•
Default setting (_:9961:112) Filter time = 2 periods
With the dM/dt rise active parameter, you activate the gradient trigger in order to monitor the positive
gradients of the sum reactive power using the set filtering time (input in periods).
Parameter Value
yes
no
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 (_:9961:104) dM/dt drop active = no
•
Default setting (_:9961:108) dM/dt drop (/Filter time) = 34.641 var
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Description
This setting value multiplies the trigger threshold by -1.
Description
The sum reactive power is monitored for exceeding the set values.
The sum reactive power is not monitored for exceeding the set values.
Description
The sum reactive power is monitored for dropping below the set values.
The sum reactive power is not monitored for dropping below the set values.
Description
The positive gradient of the sum reactive power is monitored.
The positive gradient of the sum reactive power is not monitored.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017