Application And Setting Notes Trigger Ssum - Siemens SIPROTEC 5 Manual

•
Default setting (_:9961:116) dM/dt drop hysteresis = 0.980 p.u.
•
Default setting (_:9961:112) 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 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 drop (/Filter
time) and can be adjusted.
7.5.4.6

Application and Setting Notes Trigger Ssum

Parameter: Mode
•
Default setting (_:10021:1) 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: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting (_:10021:101) Max. trigger active = yes
•
Default setting (_:10021:105) Max. trigger = 207.846 VA
•
Default setting (_:10021:113) Max. trigger hysteresis = 0.980 p.u.
With the Max. trigger active parameter, you activate the level trigger in order to monitor the sum
apparent power and to prevent it from 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 (_:10021:102) Min. trigger active = yes
•
Default setting (_:10021:106) Min. trigger = 138.564 VA
•
Default setting (_:10021:114) Min. trigger hysteresis = 1.020 p.u.
With the Min. trigger active parameter, you activate the level trigger in order to monitor the sum
apparent 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.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Description
The negative gradient of the sum reactive power is monitored.
The negative gradient of the sum reactive power is not monitored.
Description
The Trigger Ssum function block is activated and the sum apparent power
is monitored according to the set trigger parameters.
The Trigger Ssum function block is deactivated.
The Trigger Ssum function block is activated for test purposes.
Description
The sum apparent power is monitored for exceeding the set values.
The sum apparent power is not monitored for exceeding the set values.
Description
The sum apparent power is monitored for dropping below the set values.
The sum apparent power is not monitored for dropping below the set
values.
Fault Recorder
7.5 Trigger Functions 3-Phase
341