Because the setting ranges of the threshold voltages VLiveBusEnerg/VLiveLineEnerg andVDeadBusEnerg/VDeadLineEnerg partly overlap each other, the setting conditions maybe such that the setting of the non-energized threshold value is higher than that of theenergized threshold value. The parameters must therefore be set carefully to avoidoverlapping.VMaxEnergThis setting is used to block the closing when the voltage on the live side is above the setvalue of VMaxEnerg.tAutoEnerg and tManEnergThe purpose of the timer delay settings, tAutoEnerg and tManEnerg, is to ensure that thedead side remains de-energized and that the condition is not due to a temporaryinterference. Should the conditions not persist for the specified time, the delay timer isreset and the procedure is restarted when the conditions are fulfilled again. Circuit breakerclosing is thus not permitted until the energizing condition has remained constantthroughout the set delay setting time.12.2 Autorecloser for 1 phase, 2 phase and/or 3 phaseoperation SMBRREC (79)12.2.1 IdentificationFunction Description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberAutorecloser for 1 phase, 2 phase and/or 3phaseSMBRRECO->ISYMBOL-L V1 EN7912.2.2 ApplicationIn certain countries it is standard practice to provide delayed restoration after busbarprotection operation for internal fault, reason being that many busbar faults are of thetransient natures that is, animals, birds, storm, flying objects, etc. In such applications,typically one pre-selected feeder is automatically closed with certain time delay in orderto try to re-energize the faulty bus. Typically, the longest overhead line is selected in orderto limit the fault current in case of permanent busbar fault. If the first feeder is successfullySection 12 1MRK 505 337-UUS -Control300Application manual
