Max. trigger active/Min. trigger active
With the parameters
Max. trigger active
and
Min. trigger active
, you can define whether the
respective level trigger is active or inactive.
Max. trigger/Min. trigger
With the parameters
Max. trigger
and
Min. trigger
, you can define from which threshold value the
activated level trigger starts a fault record.
dM/dt rise active - dM/dt drop active
With the parameters
dM/dt rise active
and
dM/dt drop active
, you can define, whether the respec-
tive gradient trigger is active or inactive.
Filter Time
With the
Filter time
parameter, you define the number of the periods with which the gradient is deter-
mined.
Gradient Trigger for Rising and Dropping Gradients of the Power Frequency
With the parameters
dM/dt rise (/Filter time)
and
dM/dt drop (/Filter time)
, you define
from which threshold value within the set filtering time a fault record is started.
Application and Setting Notes - Frequency Trigger
Parameter: Mode
•
Default setting
(_:9721:1) Mode
=
off
With the
Mode
parameter, you activate the trigger for normal operation (On) or the test mode (Test).
Parameter Value
Description
on
Function block Trigger f is activated and the power frequency monitored
according to the set trigger parameters.
off
Function block Trigger f is deactivated.
test
Function block Trigger f is activated for test purposes.
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting
(_:9721:101) Max. trigger active
=
yes
•
Default setting
(_:9721:102) Max. trigger
=
50.200 Hz
•
Default setting
(_:9721:113) Max. trigger hysteresis
=
0.998 p.u.
With the
Max. trigger active
parameter, you activate the level trigger in order to monitor the power
frequency and to prevent it from exceeding the set values.
Parameter Value
Description
yes
The power frequency is monitored for exceeding the set values.
no
The power frequency is not monitored for exceeding the set values.
The hysteresis is preset at the factory to 0.998 p.u. (equal to 0.2 %) of the parameter
Max. trigger
and can
be adjusted.
Parameter: Min. Trigger Active/Min. Trigger/Min. Trigger Hysteresis
•
Default setting
(_:9721:103) Min. trigger active
=
yes
•
Default setting
(_:9721:104) Min. trigger
=
49.600 Hz
•
Default setting
(_:9721:114) Min. trigger hysteresis
=
1.002 p.u.
7.5.3.4
Fault Recorder
7.5 Trigger Functions 3-Phase
SIPROTEC 5, Fault Recorder, Manual
333
C53000-G5040-C018-5, Edition 11.2017
Summary of Contents for SIPROTEC 5
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