5. Set and apply about 20% higher voltage than the measured operate value forone phase.6. Measure the time delay for the TR1 signal and compare it with the set value.7. Check the inverse time delay by injecting a voltage corresponding to 1.2 ×U1>.8. Repeat the test to check the inverse time characteristic at different over-voltage levels.9. Repeat the above described steps for Step 2 of the function.10.5.2.2 Extended testing GUID-BE4B4A36-CCEE-4020-B7DC-6A83A43D11F5 v21. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operationmode.10.5.2.3 Completing the test M13806-43 v6Continue 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.10.5.3 Two step residual overvoltage protection ROV2PTOV SEMOD54358-3 v7Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".10.5.3.1 Verifying the settings SEMOD54358-35 v111. Apply a single-phase voltage either to a single-phase voltage input or to aresidual voltage input with the start value below the set value U1>.2. Slowly increase the value until ST1 appears.3. Note the operate value and compare it with the set value.4. Decrease the voltage slowly and note the reset value.5. Set and apply a 20% higher voltage than the measured operate value for onephase.6. Measure the time delay for the TR1 signal and compare it with the set value.7. Check the inverse time delay by injecting a voltage corresponding to 1.2 ×U1>.For example, if the inverse time curve A is selected, the tripsignals TR1 and TRIP operate after a time corresponding tothe equation:1MRK 505 372-UEN A Section 10Testing functionality by secondary injectionBusbar protection REB670 2.2 IEC 115Commissioning manual
