Section 10 Control10.1 Autorecloser for 1 phase, 2 phase and/or 3 phaseoperation SMBRREC IP14559-1 v610.1.1 IdentificationM14890-1 v6Function Description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberAutorecloser for 1 phase, 2 phase and/or 3phaseSMBRRECO->ISYMBOL-L V1 EN-US7910.1.2 Application M12391-3 v7Automatic reclosing is a well-established method for the restoration of service in a powersystem after a transient line fault. The majority of line faults are flashover arcs, which aretransient by nature. When the power line is switched off by the operation of line protectionand line breakers, the arc de-ionizes and recovers its ability to withstand voltage at asomewhat variable rate. Thus, a certain dead time with a de-energized line is necessary. Lineservice can then be resumed by automatic reclosing of the line breakers. The dead timeselected should be long enough to ensure a high probability of arc de-ionization andsuccessful reclosing.For individual line breakers, auto-reclosing equipment, the auto-reclosing open time is used todetermine line “dead time”. When simultaneous tripping and reclosing at the two line endsoccurs, auto-reclosing open time is approximately equal to the line “dead time”. If the opentime and dead time differ then, the line will be energized until the breakers at both ends haveopened.1MRK 505 355-UEN A Section 10Control149Application manual
