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1MRK 511 409-UUS Rev. K
1.
Check that the settings in the IED are appropriate, for example the PUFrequency and the tDelay.
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 PUFrequency.
6.
Check that the PICKUP signal does not appear.
7.
Wait for a time corresponding to tDelay, make sure that the TRIP signal does not appear.
11.6.2.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.6.3
Rate-of-change frequency protection SAPFRC (81)
Prepare the IED for verification of settings as outlined in section
for test"
in this chapter.
11.6.3.1
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 PickupFreqgrad, 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 PickupFreqgrad, and check that the PICKUP signal appears.
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 PickupFreqGrad.
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 TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
Phasor measurement unit RES670
Commissioning manual
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Testing functionality by secondary injection
"Requirements"
and section
Section 11
M16290-52 v5
M16256-2 v6
"Preparing
M16256-8 v1
M16256-10 v5
M16256-29 v4
M16256-39 v4
123
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