IL1IL2IL3INUL1UL2UL3UNIL1IL2IL3UL1IN (I4,I5)TRIP L1TRIP L2TRIP L3Test equipmentIEDIEC09000652-1-en.vsdUL2UL3UNUN (U4,U5)IEC 61850IEC09000652 V1 EN-USFigure 19: Connection example of the test equipment to the IED when testequipment is connected to the transformer input module10.5 Releasing the function to be tested M11413-2 v7Release or unblock the function to be tested. This is done to ensure that only thefunction or the chain of functions to be tested are in operation and that otherfunctions are prevented from operating. Release the tested function(s) by settingthe corresponding Blocked parameter under Function test modes to No in the localHMI.When testing a function in this blocking feature, remember that not only the actualfunction must be activated, but the whole sequence of interconnected functions(from measuring inputs to binary output contacts), including logic must beactivated. Before starting a new test mode session, scroll through every function toensure that only the function to be tested (and the interconnected ones) have theparameters Blocked and eventually EvDisable set to No and Yes respectively.Remember that a function is also blocked if the BLOCK input signal on thecorresponding function block is active, which depends on the configuration. Ensurethat the logical status of the BLOCK input signal is equal to 0 for the function to betested. Event function blocks can also be individually blocked to ensure that noevents are reported to a remote station during the test. This is done by setting theparameter EvDisable to Yes.Any function is blocked if the corresponding setting in the localHMI under Main menu/Test/Function test modes menu remainsOn, that is, the parameter Blocked is set to Yes and the parameterTESTMODE under Main menu/Test/IED test mode remainsSection 10 1MRK 505 378-UEN ATesting IED operation92 Line differential protection RED670 2.2 IECCommissioning manual
