1. Subject the IED to healthy normal load conditions for at least two seconds.2. Apply the fault condition to find the operating time for the phase-to-phasefault according to test point 12 in figure 33 and table 30 for zone 1. Comparethe result of the measurement to the setting tPPZ1.3. Repeat steps 1 to 2 to find the operating time for the phase-to-earth faultaccording to test point 12 in figure 34 and table 31. Compare the result of themeasurement to the setting tPEZ1.4. Repeat steps 1 to 2 to find the operating time for all other used measuringzones.The zones that are not tested have to be blocked and the zone that is testedhas to be released.11.4.7.3 Completing the test GUID-60C5389E-B021-45BB-8CB3-E21348CF50EF 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.11.4.8 High Speed distance for series compensated line zones,quadrilateral and mho characteristic ZMFCPDISGUID-EE954483-7157-4EA2-A5DD-537DF6864BC2 v4Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".Measure operating characteristics during constant current conditions. Keep themeasured current as close as possible to its rated value or lower. But make sure it ishigher than the set minimum operating current.Ensure that the maximum continuous current to the IED does not exceed four timesits rated value, if the measurement of the operating characteristics runs underconstant voltage conditions.The test procedure has to take into consideration that the shaped load encroachmentcharacteristic is active. It is therefore necessary to check the setting. To verify thesettings with the shaped load encroachment characteristic the test should be carriedout according to figures 35 and 36 and tables 32 and 33. In cases where the loadencroachment characteristic is activated tests according to the adjusted figuresshould be carried out.To verify the settings for the operating points according to the following fault typesshould be tested:• One phase-to-phase fault• One phase-to-earth faultThe shape of the operating characteristic depends on the values of the settingparameters.Section 11 1MRK 505 378-UEN ATesting functionality by secondary injection136 Line differential protection RED670 2.2 IECCommissioning manual
