Completing The Test - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
Extended testing
1. The test above can be repeated to check the time to reset.
2. The tests above can be repeated to test the frequency dependent inverse time characteristic.
Verification of the low voltage magnitude blocking
1. Check that the IED settings are appropriate, for example the
tDelay .
2. Supply the IED with three-phase voltages at 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 decrease the frequency of the applied voltage, to a value below
6. Check that the PICKUP signal does not appear.
7. Wait for a time corresponding to
10.7.1.2

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.
10.7.2 Overfrequency protection SAPTOF (81)
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
10.7.2.1 Verifying the settings
Verification of PICKUP value and time delay to trip
1. Check that the settings in the IED are appropriate, for example the PICKUP value and the
time delay.
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly increase the frequency of the applied voltage, until the PICKUP signal appears.
4. Note the trip value and compare it with the set value.
5. Decrease the frequency to rated operating conditions.
6. Check that the PICKUP signal resets.
7. Instantaneously increase the frequency of the applied voltage to a value about 1% lower than
the trip value (a step change more than 2% will increase the time delay).
8. Measure the time delay for the TRIP signal, and compare it with the set value. Note that the
measured time consists of the set value for time delay plus minimum trip time of the pickup
function (80 - 90 ms).
Extended testing
1. The test above can be repeated to check the time to reset.
Verification of the low voltage magnitude blocking
Commissioning manual
tDelay , make sure that the TRIP signal does not appear.
in this chapter.
Testing functionality by secondary injection
PUFrequency , VMin , and the
VMin .
PUFrequency .
TestMode setting to Disabled .
"Requirements" and
Section 10
M16289-31 v5
M16289-39 v7
M16289-57 v5
M16290-2 v6
M16290-12 v2
M16290-14 v5
M16290-28 v4
M16290-34 v5
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