13.5.16 Generator rotor overload protection (49R) GUID-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 TD1 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, betweentwo shots, or reset this memory by setting the RESET input into the function to valueTRUE.Precautions if MeasurCurrent = DC. The magnitude of the injected current have to bedecreased by multiplying it with a factor of 0.741 in order to get correct operate timeswhen testing with three-phase symmetrical sinusoidal currents.1. Connect the test set for the appropriate three-phase current injection to the IEDphases A, B and C. The protection shall be fed with a symmetrical three-phasecurrent.2. Set the injected current to 113% of IBase, switch on the current and check operatetime of the trip, 120 s.3. Decrease the current slowly.4. The output signal PICKUP 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 125% of IBase, switch on the current and check operatetime of the trip, 60 s.7. Switch off the current.8. Set the injected current to 146% of IBase, switch on the current and check operatetime of the trip, 30 s.9. Switch off the current.10. Set the injected current to 209% of IBase, switch on the current and check operatetime of the trip, 10 s.11. Switch off the current.12. Set the injected current to 100% of IBase and switch on the current.13. Decrease the current slowly under 37 PICKUP.14. The signal 37 TRIP will be activated when timer 37 trip delay expires.15. Finally check that pickup and trip information is stored in the event menu.Section 13 1MRK 502 073-UUS ATesting functionality by secondary injection218 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062Commissioning manual
