Checking the case with fault current below set valueI>BlkCont M12104-281 v10It simulates a case where the fault current is very low and operation will depend onCB position signal from CB auxiliary contact. It is suggested that re-trip withoutcurrent check is used, setting RetripMode = No CBPos Check.1. Set FunctionMode = Current/Contact.2. Apply input signal for CB closed to the relevant input or inputs CBCLDL1 (2or 3).3. Apply the fault condition with input signal(s) for start of CCRBRF. The valueof current should be below the set value I>BlkCont.4. Verify that phase selection re-trip (if selected) and back-up trip are achievedafter set times. Failure to trip is simulated by keeping the signal(s) CB closedactivated.5. Disconnect the input signal and the START signal(s). Keep the CB closedsignal(s).6. Apply the fault and the start again. The value of current should be below theset value I>BlkCont.7. Arrange disconnection of BC closed signal(s) well before set back-up triptime t2. It simulates a correct CB tripping.8. Verify that back-up trip is not achieved. Re-trip can appear for example, dueto selection “Re-trip without current check”.13.5.8.8 Completing the test M12104-72 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.13.5.9 Pole discordance protection CCPDSC SEMOD55625-59 v6Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".13.5.9.1 Verifying the settings SEMOD55625-63 v81. External detection logic, Contact function selection = ContSel setting equalsCCPDSC signal from CB. Activate the EXTPDIND binary input, andmeasure the operating time of CCPDSC.Use the TRIP signal from the configured binary output to stop the timer.2. Compare the measured time with the set value tTrip.3. Reset the EXTPDIND input.4. Activate the BLKDBYAR binary input.This test should be performed together with Autorecloser SMBRREC.5. Activate the EXTPDIND binary input.No TRIP signal should appear.6. Reset both BLKDBYAR and EXTPDIND binary inputs.1MRK 502 073-UEN A Section 13Testing functionality by secondary injectionGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 191Commissioning manual
