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 timecharacteristic.Verification of the low voltage magnitude blocking M16289-39 v71. 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 BLKDMAGNsignal 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 belowStartFrequency.6. Check that the START signal does not appear.7. Wait for a time corresponding to tDelay, make sure that the TRIP signal doesnot appear.13.7.1.2 Completing the test M16289-57 v5Continue to test another function or end the test by changing the TESTMODEsetting to Off. Restore connections and settings to their original values, if they werechanged for testing purposes.13.7.2 Overfrequency protection SAPTOF M16290-2 v7Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".13.7.2.1 Verifying the settings M16290-12 v2Verification of START value and time delay to operate M16290-14 v61. Check that the IED settings are appropriate, for example the start value andthe time delay.2. Supply the IED with three-phase voltages at their rated values and initialfrequency.3. Slowly increase the frequency of the applied voltage with a 40 mHz step,applying it for a period that is 10% longer than tDelay.4. Note the operate value and compare it with the set value.5. Decrease the frequency to rated operating conditions.6. Check that the START signal resets.Section 13 1MRK 502 073-UEN ATesting functionality by secondary injection216 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062Commissioning manual
