Siemens SIPROTEC 5, Manual

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Parameter Value Description
no
The negative gradient of the RMS value of the voltage is not monitored.
If the gradient trigger does not operate phase-selectively, the set threshold value of the parameter
-dM/dt
(Non-phs sel.)
applies to all phases.
If the gradient trigger operates phase-selectively, set the threshold values for the gradient trigger separately
for each phase. Then, the parameters
-dM/dt phs A(AB)
,
-dM/dt phs B(BC)
, and
-dM/dt phs C(CA)
are effective.
The hysteresis is preset at the factory to 0.980 p.u. (equal to 2 %) of the parameter
-dM/dt (Non-phs
sel.)
and can be adjusted.
Application and Setting Notes - V0 Trigger (Zero-Sequence System)
Parameter: Mode
•
Default setting
(_:9631:1) Mode
=
off
With the
Mode
parameter, you activate the trigger for normal operation (On) or the test mode (Test).
Parameter Value Description
on
The function block V0 Trigger is activated and the voltage in the zero-
sequence system is monitored on the basis of the set trigger parameter.
off
The function block V0 Trigger is deactivated.
test
The function block V0 Trigger is activated for test purposes.
Parameter: Max. Trigger Active/Max. Trigger/Max. Trigger Hysteresis
•
Default setting
(_:9631:101) Max. trigger active
=
yes
•
Default setting
(_:9631:105) Max. trigger
=
69.284 V
•
Default setting
(_:9631:113) Max. trigger hysteresis
=
0.980 p.u.
With the
Max. trigger active
parameter, you activate the level trigger in order to monitor in the zero-
sequence system the voltage and to prevent it from exceeding the set values.
Parameter Value Description
yes
The voltage in the zero-sequence system is monitored for overvoltage.
no
The voltage in the zero-sequence system is not monitored for overvoltage.
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: dM/dt Rise Active - dM/dt Rise (/Filter Time) - dM/dt Rise Hysteresis - Filter Time
•
Default setting
(_:9631:103) dM/dt rise active
=
no
•
Default setting
(_:9631:107) dM/dt rise (/Filter time)
=
11.547 V
•
Default setting
(_:9631:115) dM/dt rise hysteresis
=
0.980 p.u.
•
Default setting
(_:9631:112) 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 voltage in the zero-sequence system using the set filtering time (input in periods).
Parameter Value Description
yes
The positive gradient of the voltage in the zero-sequence system is moni-
tored.
no
The positive gradient of the voltage in the zero-sequence system is not
monitored.
7.5.1.6
Fault Recorder
7.5 Trigger Functions 3-Phase
SIPROTEC 5, Fault Recorder, Manual 305
C53000-G5040-C018-5, Edition 11.2017