1. Connect the test set for the appropriate three-phase current injection to theIED phases L1, L2 and L3. The protection shall be fed with a symmetricalthree-phase current.2. Set the injected current to 116% of IBase, switch on the current and checkoperate time of the trip, 120 s.3. Decrease the current slowly.4. The output signal START will reset if the measured current falls below resetlevel or if BLOCK signal is set to one.5. Switch off the current.6. Set the injected current to 120% of IBase, switch on the current and checkoperate time of the trip, 60 s.7. Switch off the current.8. Set the injected current to 154% of IBase, switch on the current and checkoperate time of the trip, 30 s.9. Switch off the current.10. Set the injected current to 226% of IBase, switch on the current and checkoperate time of the trip, 10 s.11. Switch off the current.12. Finally check that start and trip information is stored in the event menu.13.5.15.2 Completing the test GUID-F79CE91E-7F07-45F4-8CDC-D7426CA9CBEA v2Continue to test another function or end the test by changing the Test mode settingto Off. Restore connections and settings to their original values, if they werechanged for testing purposes. Make sure that all built-in features for this function,which shall be in operation, are enabled and with correct settings.13.5.16 Generator rotor overload protection GRPTTRGUID-4BEA4A9E-AEE1-4E4E-9D7C-ABA3499EB431 v113.5.16.1 Verifying the settings GUID-2AF96028-B49E-4820-BD3D-4957E75B9C2D v2Explained testing method is given for default value for the k1 parameter.The function has heating content memory features. Thus if testing shots are doneconsecutively, operate time will be shortened accordingly, compared to the givenoperate characteristic. Therefore, either wait until set tReset time has elapsed,between two shots, or reset this memory by setting the RESET input into thefunction to value TRUE.Precautions if MeasurCurrent = DC. The magnitude of the injected current have tobe decreased by multiplying it with a factor of 0.741 in order to get correct operatetimes when testing with three-phase symmetrical sinusoidal currents.Section 13 1MRK 502 073-UEN ATesting functionality by secondary injection202 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062Commissioning manual
