Completing The Test - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
1. Check that the settings in the IED are appropriate, for example the
the
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly decrease the magnitude of the applied voltage, until the BLKDMAGN signal appears.
4. Note the voltage magnitude value and compare it with the set value,
5. Slowly increase the frequency of the applied voltage, to a value above
6. Check that the PICKUP signal does not appear.
7. Wait for a time corresponding to
10.7.2.2

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.
10.7.3 Rate-of-change frequency protection SAPFRC (81)
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
10.7.3.1 Verifying the settings
PICKUP value and time delay to trip
1. Check that the settings in the IED are appropriate, especially the PICKUP value and the
definite time delay. Set
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
4. Note the trip 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 PICKUP 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.
10.7.3.2 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.
178
tDelay .
in this chapter.
PickupFreqgrad , to a rather small negative value.
tDelay , make sure that the TRIP signal does not appear.
PickupFreqgrad , and check that the PICKUP signal appears.
1MRK 504 154-UUS B
PUFrequency , VMin , and
VMin .
PUFrequency .
TestMode setting to Disabled .
"Requirements" and
PickupFreqGrad .
TestMode setting to Disabled .
Commissioning manual
M16290-52 v5
M16256-2 v6
M16256-8 v1
M16256-10 v5
M16256-29 v4
M16256-39 v4