Application And Setting Notes I Fund. Trig - Siemens SIPROTEC 5 Manual

Parameter: dM/dt Drop Active - dM/dt Drop (/Filter Time) - Filter Time
•
Default setting (_:9781:104) dM/dt drop active = no
•
Default setting (_:9781:108) dM/dt drop (/Filter time) = 0.300 A
•
Default setting (_:9781:116) dM/dt drop hysteresis = 0.980 p.u.
•
Default setting (_:9781:112) 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 RMS value of the current, 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.
7.4.2.5

Application and Setting Notes I Fund. Trig

Parameter: Mode
•
Default setting Mode = off
With the Mode parameter, you activate the trigger for normal operation (On) or for the test mode (Test).
Parameter Value
on
off
test
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting (_:9751:101) Max. trigger active = yes
•
Default setting (_:9751:105) Max. trigger = 1.200 A
•
Default setting (_:9751:113) Max. trigger hysteresis = 0.980 p.u.
With the Max. trigger active parameter, you activate the level trigger in order to monitor the current
of the fundamental component and 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 (_:9751:102) Min. trigger active = yes
•
Default setting (_:9751:106) Min. trigger = 0.800 A
•
Default setting (_:9751:114) Min. trigger hysteresis = 1.020 p.u.
With the Min. trigger active parameter, you activate the level trigger in order to monitor the current of
the fundamental component and prevent it from dropping below the set values.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Description
The negative gradient of the RMS value of the current is monitored.
The negative gradient of the RMS value of the current is not monitored.
Description
The function block Trig. I fund. is activated and the fundamental compo-
nent monitored according to the set trigger parameters.
The function block Trig. I fund. is deactivated.
The function block Trig. I fund. is activated for test purposes.
Description
The current of the fundamental component is monitored for overcurrent.
The current of the fundamental component is not monitored for overcur-
rent.
Fault Recorder
7.4 Trigger Functions 1-Phase
281