Completing The Test; Overfrequency Protection Saptof; Verifying The Settings - ABB Relion 670 Series REL670 Commissioning Manual

1MRK 506 355-UEN A
10.7.1.2
10.7.2
10.7.2.1
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
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.

Completing the test

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.

Overfrequency protection SAPTOF

Prepare the IED for verification of settings outlined in section
verify settings".

Verifying the settings

Verification of START value and time delay to operate
1. Check that the settings in the IED are appropriate, for example the START 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 START signal
appears.
4. Note the operate value and compare it with the set value.
5. Decrease the frequency to rated operating conditions.
Section 10
"Preparing the IED to
183