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1MRK 505 372-UEN Rev. K
10.4.9.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
10.4.10
Directional overpower protection GOPPDOP
Prepare the IED for verification of settings as outlined in section
section
10.4.10.1
Verifying the settings
The overpower protection shall be set to values according to the real set values to be used. The test
is made by means of injection of voltage and current where the amplitude of both current and voltage
and the phase angle between the voltage and current can be controlled. During the test the analog
outputs of active and reactive power shall be monitored.
1.
Connect the test set for injection of voltage and current corresponding to the mode to be used
in the application. If a three phase test set is available this could be used for all the modes. If a
single phase current/voltage test set is available the test set should be connected to a selected
input for one phase current and voltage.
2.
Adjust the injected current and voltage to the set rated values in % of IBase and UBase
(converted to secondary current and voltage). The angle between the injected current and
voltage shall be set equal to the set direction Angle1, angle for stage 1 (equal to 0° for low
forward power protection and equal to 180° for reverse power protection). Check that the
monitored active power is equal to 100% of rated power and that the reactive power is equal to
0% of rated power.
3.
Change the angle between the injected current and voltage to Angle1 + 90°. Check that the
monitored active power is equal to 0% of rated power and that the reactive power is equal to
100% of rated power.
4.
Change the angle between the injected current and voltage back to Angle1 value. Increase the
current slowly from 0 until the START1 signal, start of stage 1, is activated. Check the injected
power and compare it to the set value Power1, power setting for stage 1 in % of Sbase.
5.
Increase the current to 100% of IBase and switch the current off.
6.
Switch the current on and measure the time for activation of TRIP1, trip of stage 1.
7.
If a second stage is used, repeat steps
10.4.10.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
10.4.11
Capacitor bank protection CBPGAPC
Prepare the IED for verification of settings as outlined in section
In this section it is shown how to test the capacitor bank protection function CBPGAPC for application
on a 50Hz, 200MVAr, 400kV SCB with 500/1A ratio CT.
As calculated in the application manual the base current for this particular SCB will be 289A on the
primary side and 0.578A on the CT secondary side. Before any testing is commenced make sure that
Busbar protection REB670
Commissioning manual
"Preparing for test"
in this chapter.
Note that such SCB is shown in the application manual for this function. The same
procedure can be used to test SCB with some other rating and different CT ratio.
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"Requirements"
2
to
6
for the second stage.
"Preparing for test"
Section 10
Testing functionality by secondary injection
SEMOD175027-15 v4
SEMOD175058-3 v5
and
SEMOD175058-7 v6
SEMOD175058-66 v4
GUID-00163D04-EBA8-4CD2-9B7A-B3EC15D32069 v2
in this chapter.
95
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