A disconnected line can have a considerable potential due to, for instance,induction from a line running in parallel, or by being fed via theextinguishing capacitors in the circuit breakers. This voltage can be ashigh as 30% or more of the base line voltage.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.15.2 Autorecloser for 1 phase, 2 phase and/or 3 phaseoperation SMBRREC (79)15.2.1 IdentificationFunction Description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberAutorecloser for 1 phase, 2 phase and/or 3phaseSMBRREC5(0 -->1)IEC15000204 V1 EN791MRK 506 369-UUS - Section 15ControlLine distance protection REL670 2.2 ANSI 653Application manual
