Parameter Value
Description
on
The function block I RMS Trig is activated and the RMS value of the current
is monitored according to the set trigger parameter.
off
The function block I RMS Trig is deactivated.
test
The function block I RMS Trig is activated for test purposes.
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting
(_:9781:101) Max. trigger active
=
yes
•
Default setting
(_:9781:105) Max. trigger
=
1.200 A
•
Default setting
(_:9781:113) Max. trigger hysteresis
=
0.980 p.u.
With the
Max. trigger active
parameter, you activate the level trigger in order to monitor the RMS value
of the current and to prevent exceeding the set values..
Parameter Value
Description
yes
The RMS value of the current is monitored for overcurrent.
no
The RMS value of the current is not monitored for overcurrent.
The hysteresis is preset the factory to 0.980 p.u. of the parameter
Max. trigger
and can be adjusted.
Parameter: Min. Trigger Active/Min. Trigger/Min. Trigger Hysteresis
•
Default setting
(_:9781:102) Min. trigger active
=
yes
•
Default setting
(_:9781:106) Min. trigger
=
0.800 A
•
Default setting
(_:9781:114) Min. trigger hysteresis
=
1.020 p.u.
With the
Min. trigger active
parameter, you activate the level trigger in order to monitor the RMS value
of the current and to prevent it from dropping below the set values.
Parameter Value
Description
yes
The RMS value of the current is monitored for undercurrent.
no
The RMS value of the current is not monitored for undercurrent.
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
(_:9781:103) dM/dt rise active
=
no
•
Default setting
(_:9781:107) dM/dt rise (/Filter time)
=
0.300 A
•
Default setting
(_:9781:115) dM/dt rise hysteresis
=
0.980 p.u.
•
Default setting
(_:9781:112) 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 RMS value of the current, using the set filtering time (input in periods).
Parameter Value
Description
yes
The positive gradient of the RMS value of the current is monitored.
no
The positive gradient of the RMS value of the current 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.
Fault Recorder
7.4 Trigger Functions 1-Phase
280
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Summary of Contents for SIPROTEC 5
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