Autorecloser For 1 Phase, 2 Phase And/Or 3 Phase Operation Smbrrec (79); Identification; Application - ABB Relion 670 Series Applications Manual

Section 13
Control
restarted when the conditions are fulfilled again. Circuit breaker closing is thus not permitted until
the energizing condition has remained constant throughout the set delay setting time.
13.2 Autorecloser for 1 phase, 2 phase and/or 3 phase
operation SMBRREC (79)
13.2.1

Identification

Function Description
Autorecloser for 1 phase, 2 phase and/or 3
phase
13.2.2

Application

Automatic reclosing is a well-established method for the restoration of service in a power system
after a transient line fault. The majority of line faults are flashover arcs, which are transient by
nature. When the power line is switched off by the operation of line protection and line breakers,
the arc de-ionizes and recovers its ability to withstand voltage at a somewhat variable rate. Thus, a
certain dead time with a de-energized line is necessary. Line service can then be resumed by
automatic reclosing of the line breakers. The dead time selected should be long enough to ensure
a high probability of arc de-ionization and successful reclosing.
For individual line breakers, auto-reclosing equipment, the auto-reclosing open time is used to
determine line "dead time". When simultaneous tripping and reclosing at the two line ends occurs,
auto-reclosing open time is approximately equal to the line "dead time". If the open time and dead
time differ then, the line will be energized until the breakers at both ends have opened.
270
IEC 61850 IEC 60617
identification identification
SMBRREC
O->I
SYMBOL-L V1 EN-US
1MRK 511 358-UUS A
IP14559-1 v6
M14890-1 v6
ANSI/IEEE C37.2
device number
79
M12391-3 v7
Application manual