Parameter Value
Description
no
The power frequency is not monitored for dropping below the set value.
The hysteresis is preset at the factory to 1.002 p.u. (equal to 0.2 %) 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
(_:9721:105) dM/dt rise active
=
no
•
Default setting
(_:9721:106) dM/dt rise (/Filter time)
=
0.100 Hz
•
Default setting
(_:9721:115) dM/dt rise hysteresis
=
0.998 p.u.
•
Default setting
(_:9721:112) 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 apparent power using the set filtering time (input in periods).
Parameter Value
Description
yes
The positive gradient of the power frequency is monitored.
no
The positive gradient of the power frequency is not monitored.
The hysteresis is preset at the factory to 0.998 p.u. (equal to 0.2 %) 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
(_:9721:107) dM/dt drop active
=
no
•
Default setting
(_:9721:108) dM/dt drop (/Filter time)
=
0.100 Hz
•
Default setting
(_:9721:116) dM/dt drop hysteresis
=
0.998 p.u.
•
Default setting
(_:9721:112) 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 power frequency using the set filtering time (input in periods).
Parameter Value
Description
yes
The negative gradient of the power frequency is monitored.
no
The negative gradient of the power frequency is not monitored.
The hysteresis is preset at the factory to 0.998 p.u. (equal to 0.2 %) of the parameter
dM/dt drop (/
Filter time)
and can be adjusted.
Settings
Addr.
Parameter
C
Setting Options
Default Setting
Trigger f 1
_:9721:1
Trigger f 1:Mode
•
off
•
on
•
test
off
_:9721:101
Trigger f 1:Max. trigger
active
•
no
•
yes
yes
_:9721:102
Trigger f 1:Max. trigger
50.000 Hz to 60.000 Hz
50.200 Hz
_:9721:113
Trigger f 1:Max. trigger
hysteresis
0.990 p.u. to 0.999 p.u.
0.998 p.u.
_:9721:103
Trigger f 1:Min. trigger
active
•
no
•
yes
yes
_:9721:104
Trigger f 1:Min. trigger
25.000 Hz to 50.000 Hz
49.600 Hz
7.4.3.5
Fault Recorder
7.4 Trigger Functions 1-Phase
288
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Summary of Contents for SIPROTEC 5
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