Completing The Test - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
5. Continuously change the frequency of the applied voltage, so that for a certain time the frequency is
outside the set band limit and falls gradually within the band limit.
6. Count only the time when the frequency lies within the set frequency band limit. Wait for a time
corresponding to tAccLimit and ensure that the ACCALARM signal appears.
7. Measure the time delay for the ACCALARM signal and compare it to the set value.
Extended testing
1. To check the value of TRIPACC, repeat the above test case in such a way that the frequency of the
applied voltage is within the set frequency band when time approaches the tAccLimit setting value.
Verification of generator start and stop logic
1. Ensure that the settings in the IED are appropriate to the default settings, especially the
PickupCurrentLevel, FreqHighLimit, FreqLowLimit, VHighLimit and VLowLimit.
2. Ensure that the setting CBCheck is enabled.
3. Supply the IED with three-phase currents and voltages at their rated values.
4. Slowly decrease the frequency of the applied voltage until the BFI_3P signal appears.
5. Activate the CBOPEN input signal.
6. Slowly decrease the injected current below the PickupCurrentLevel value until the BFI_3P signal
disappears.
7. Compare the current magnitude value to the set value.
Verification of voltage band limit check logic
1. Ensure that the settings in the IED are appropriate to the default settings, especially the
PickupCurrentLevel, FreqHighLimit, FreqLowLimit, VHighLimit and VLowLimit settings.
2. Ensure that the EnaVoltCheck is enabled.
3. Supply the IED with three-phase currents and voltages at their rated values.
4. Check that the VOLTOK signal appears.
5. Slowly decrease the frequency of the applied voltage until the BFI_3P signal appears.
6. Slowly decrease the positive-sequence voltage of the injected voltage below the VLowLimit value
until the BFI_3P signal disappears.
7. Check that the VOLTOK signal disappears.
8. Compare the reset value to the set voltage low limit value.
9. Readjust the positive-sequence voltage of the applied voltage to a value within the set voltage band
limits.
10. Check that the BFI_3P signal reappears.
11. Slowly increase the positive-sequence voltage of the injected voltage above the VUHighLimit value
until the BFI_3P signal disappears.
12. Compare the reset value to the set voltage high limit value.
11.7.4.2

Completing the test

• Continue to test another function or end the test by changing the Test mode setting to Disabled.
• Restore connections and settings to their original values if they were changed for testing purposes.
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Commissioning manual