11.5.2.2 Completing the test SEMOD56287-118 v4Continue 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.11.5.3 Instantaneous residual overcurrent protection EFPIOCSEMOD52967-3 v7Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".Values of the logical signals for EFPIOC are available on the local HMI underMain menu/Tests/Function status/Current protection/InstResidualOverCurrent(50N,IN>>)/EFPIOC(50N;IN>>):x, where x = 1, 2,and 3.The Signal Monitoring in PCM600 shows the same signals that are available on thelocal HMI.To verify the settings the following fault type should be tested:• Phase-to-earth faultEnsure that the maximum continuous current, supplied from the current sourceused for the test of the IED, does not exceed four times the rated current value ofthe IED.11.5.3.1 Measuring the operate limit of set values SEMOD52967-11 v91. Inject a phase current into the IED with an initial value below the set value ofIN>> and also make sure that the set value IN>> is in between IN>>Min andIN>>Max.2. Increase the injected current in the Ln or in the neutral (summated currentinput) phase until the TRIP signal appears.3. Switch the fault current off.Do not exceed the maximum permitted overloading of thecurrent circuits in the IED.4. Compare the measured operating current with the set value.11.5.3.2 Completing the test SEMOD52967-24 v5Continue 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.Section 11 1MRK 505 378-UEN ATesting functionality by secondary injection174 Line differential protection RED670 2.2 IECCommissioning manual
