ABB REL650 series, Commissioning Manual

Page: 135 / 208

5. Slowly increase the frequency of the applied voltage, to a value above
StartFrequency .
6. Check that the START signal does not appear.
7. Wait for a time corresponding to tDelay , make sure that the TRIP signal does
not appear.
9.6.2.2 Completing the test
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Continue to test another function or end the test by changing the TESTMODE
setting to Off . Restore connections and settings to their original values, if they were
changed for testing purposes.
9.6.3 Rate-of-change frequency protection SAPFRC
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Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings" .
9.6.3.1 Verifying the settings
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Verification of START value and time delay to operate
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1. Check that the settings in the IED are appropriate, especially the START
value and the definite time delay. Set
StartFreqGrad , to a rather small
negative value.
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly decrease the frequency of the applied voltage, with an increasing rate-
of-change that finally exceeds the setting of
StartFreqGrad , and check that
the START signal appears.
4. Note the operate value and compare it with the set value.
5. Increase the frequency to rated operating conditions, and zero rate-of-change.
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
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1. The test above can be repeated to check a positive setting of StartFreqGrad .
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.
1MRK 506 383-UEN A
Section 9
Testing functionality by secondary injection
Line distance protection REL650 2.2 IEC 129
Commissioning manual