10.4.2.1 Verifying the settings SEMOD128616-59 v3Procedure1. Connect the test set for appropriate current injection to the appropriate IEDterminals.If there is any configuration logic, which is used to enable or block any of 4available overcurrent steps, make sure that step under test is enabled (that is,end fault protection).2. Increase the injected current and note the operated value of the studied step ofthe function.3. Decrease the current slowly and note the reset value.4. Block higher set stages when testing lower set stages according to below.5. Connect a trip output contact to a timer.6. Set the injected current to 200% of the operate level of the tested stage,switch on the current and check the time delay.For inverse time curves, check the operate time at a current equal to 110% ofthe operate current for tmin.7. Check that all trip and start contacts operate according to the configuration(signal matrixes)8. Repeat the above described tests for the higher set stages.9. Finally check that start and trip information is stored in the event menu.10.4.2.2 Completing the test SEMOD128616-83 v2Continue 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.10.4.3 Four step residual overcurrent protection, (Zero sequenceor negative sequence directionality) EF4PTOC SEMOD53296-3 v9Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".Values of the logical signals for D2PTOC are available on the local HMI underMain menu/Tests/Function status/Current protection/ResidualOverCurr4Step(51N_67N,4(IN>))/EF4PTOC(51N_67N;4(IN>)):x,where x = instance number.The Signal Monitoring in PCM600 shows the same signals that are available on thelocal HMI.10.4.3.1 Four step directional earth fault protection SEMOD53296-208 v7Section 10 1MRK 505 372-UEN ATesting functionality by secondary injection92 Busbar protection REB670 2.2 IECCommissioning manual
