ABB Relion 670 series, Installation And Commissioning Manual

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4. Note the operate value and compare it with the set value.
5. Increase the measured voltage to rated load conditions.
6. Check that the START signal resets.
7. Instantaneously decrease the voltage in one phase to a value about 20% lower
than the measured operate value.
8. Measure the time delay for the TRIP signal, and compare it with the set value.
Extended testing
1. The test above can now be repeated for step 2 .
2. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
3. The tests above can be repeated to check security, that is, the START and
operate signals, that are not supposed to appear, - do not.
4. The tests above can be repeated to check the time to reset.
5. The tests above can be repeated to test the inverse time characteristic.
15.7.1.2 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off . Restore connections and settings to their original values, if they were
changed for testing purposes.
15.7.2 Two step overvoltage protection OV2PTOV
Prepare the IED for verification of settings outlined in section "Overview" and
section "Preparing for test" in this chapter.
15.7.2.1 Verifying the settings
1. Apply single-phase voltage below the set value U1> .
2. Slowly increase the voltage until the ST1 signal appears.
3. Note the operate value and compare it with the set value.
4. Switch the applied voltage off.
5. Set and apply about 20% higher voltage than the measured operate value for
one phase.
6. Measure the time delay for the TR1 signal and compare it with the set value.
7. Repeat the test for step 2 .
15.7.2.2 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off . Restore connections and settings to their original values, if they were
changed for testing purposes.
Section 15
1MRK 502 029-UEN A
Verifying settings by secondary injection
192
Installation and commissioning manual