Completing The Test; Frequency Protection; Underfrequency Protection Saptuf; Verifying The Settings - ABB Relion 650 Series Commissioning Manual

Section 9
Testing functionality by secondary injection
9.6.5.2

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
9.7

Frequency protection

9.7.1

Underfrequency protection SAPTUF

Prepare the IED for verification of settings outlined in Section
9.7.1.1

Verifying the settings

Verification of START value and time delay to operate
1. Check that the IED settings are appropriate, for example the start value and the time delay.
2. Supply the IED with three-phase voltages at their rated values and initial frequency.
The initial frequency is calculated using Equation 83.
StartFrequency
IECEQUATION16059 V1 EN-US
3. Slowly decrease the voltage frequency by steps of 40 mHz until the START signal appears;
during each step apply the voltage signal for a time that is either at least 10% longer than
(tDelay+100ms) or a suitable time to monitor the function.
4. Note the frequency value at which the START signal appears and compare it with the set value
StartFrequency.
5. Increase the frequency until its rated value is reached.
6. Check that the START signal resets.
7. Supply the IED with three-phase voltages at their rated values and frequency 20 mHz over the
set value StartFrequency.
8. Decrease the frequency with a 40 mHz step, applying it for a time that is at least 10% longer
than (tDelay+100ms).
9. Measure the time delay of the TRIP signal, and compare it with the set value tDelay. Note that
the measured time consists of the set value of the time delay plus the minimum operate time of
the start function (80 - 90 ms).
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 StartFrequency, UMin , and 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 UMin.
5. Slowly decrease the frequency of the applied voltage, to a value below 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.
110

  
0.02 floor f StartFrequency

r
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"Preparing the IED to verify


/ 0.04 0.04

Line differential protection RED650
1MRK 505 395-UEN Rev. G
SEMOD175023-47 v4
SEMOD53547-1 v1
M16289-2 v7
settings".
M16289-15 v3
M16289-17 v7
(Equation 83)
M16289-31 v6
M16289-39 v7
Commissioning manual