be activated. Check under NS4PTOC function Service Values that correct I2magnitude is measured by the function.3. Set the injected negative sequence polarizing voltage slightly larger than the setminimum polarizing voltage (default 5 % of Vn) and set the injection current to lagthe voltage by an angle equal to the set reference characteristic angle (180° -AngleRCA) if the forward directional function is selected.If reverse directional function is selected, set the injection current to lag thepolarizing voltage by an angle equal to RCA.4. Increase the injected current and note the value at which the studied step of thefunction trip.5. Decrease the current slowly and note the reset value.6. Block lower set steps when testing higher set steps according to the instructions thatfollow.7. Connect a trip output contact to a timer.8. Set the injected current to 200% of the trip level of the tested step, switch on thecurrent and check the time delay.For inverse time curves, check the trip time at a current equal to 110% of the tripcurrent in order to test parameter txmin.9. Check that all trip and pickup contacts trip according to the configuration (signalmatrixes)10. Reverse the direction of the injected current and check that the step does not trip.11. Check that the protection does not trip when the polarizing voltage is zero.12. Repeat the above-described tests for the higher set steps.13. Finally, check that pickup and trip information is stored in the event menu.11.4.3.1 Completing the testContinue to test another function or end the test by changing the TestMode setting toDisabled. Restore connections and settings to their original values, if they were changedfor testing purposes.11.4.4 Sensitive directional residual overcurrent and power protectionSDEPSDE (67N)Prepare the IED for verification of settings outlined in section "Preparing the IED to verifysettings".Section 11 1MRK 511 366-UUS -Testing functionality by secondary injection126Commissioning manual
