Completing The Test; Frequency Time Accumulation Protection Function Ftaqfvr; Verifying The Settings - ABB Relion 670 Series Commissioning Manual

1MRK 511 409-UEN D
6. Check that the START signal resets.
7. Instantaneously decrease the frequency of the applied voltage to a value about 20%
lower than the nominal value.
8. Measure the time delay for the TRIP signal, and compare it with the set value.
Extended testing
1. The test above can be repeated to check a positive setting of
2. The tests above can be repeated to check the time to reset.
3. The tests above can be repeated to test the RESTORE signal, when the frequency
recovers from a low value.
11.6.3.2

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.6.4

Frequency time accumulation protection function FTAQFVR

Prepare the IED for verification of settings as outlined in section "Overview" and section
"Preparing for test" in this chapter.
11.6.4.1

Verifying the settings

Time measurement and the injection of current and voltage can be done using a common test
equipment.
Verification of the START value and time delay to operation
1. Connect the test set for the injection of three-phase currents and three-phase voltages to
the appropriate current and voltage terminals of the IED.
2. Ensure that the settings in the IED are appropriate, especially the
FreqHighLimit , FreqLowLimit , UHighLimit and ULowLimit setting.
3. Supply the IED with three-phase currents and voltages at their rated value.
4. Slowly decrease the frequency of the applied voltage until it crosses the frequency high
limit and the START signal appears.
5. Check that the FREQOK signal appears.
6. Compare the operate value to the set frequency high limit value.
7. Decrease the frequency of the applied voltage until it crosses the frequency low limit and
the START signal disappears.
8. Check that the FREQOK signal disappears.
9. Compare the reset value to the set frequency low limit value.
10. Readjust the frequency of the applied voltage (with steps of 0.001 Hz/s) to a value within
the set frequency band limit.
11. Ensure that the START signal reappears.
12. Wait for a time corresponding to
are generated.
13. Measure the time delay for the TRIP signal and compare it to the set value.
Verification of the ACCALARM value and time delay to operation
1. Connect the test set for the injection of three-phase currents and three-phase voltages to
the appropriate current and voltage terminals of the IED.
2. Ensure that the settings in the IED are appropriate for the default settings, especially the
CurrStartLevel , FreqHighLimit , FreqLowLimit , UHighLimit and ULowLimit setting.
3. Supply the IED with three-phase currents and voltages at their rated value.
Phasor measurement unit RES670
Commissioning manual
tCont and ensure that the TRIP and TRIPCONT signals
Testing functionality by secondary injection
StartFreqGrad .
TESTMODE setting to Off .
GUID-F7BD8E10-EF88-4698-87F4-0D4365004705 v2
GUID-864636E0-6399-44E1-BD2C-C2113FB78C61 v3
CurrStartLevel ,
Section 11
M16256-29 v4
M16256-39 v4
117