ABB Relion 670 Series Applications Manual page 296

Section 14
Control
tAutoEnerg and tManEnerg
The purpose of the timer delay settings,
side remains de-energized and that the condition is not due to a temporary interference. Should
the conditions not persist for the specified time, the delay timer is reset and the procedure is
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.
14.2 Autorecloser for 1 phase, 2 phase and/or 3 phase
operation SMBRREC (79)
14.2.1 Identification
Function Description
Autorecloser for 1 phase, 2 phase and/or 3
phase
14.2.2 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 flashovers, 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 required circuit breaker dead time is
used to determine the "dead time" setting value. When simultaneous tripping and reclosing at the
two line ends occurs, line dead time is approximately equal to the auto recloser "dead time". If the
auto reclosing dead time and line "dead time" differ then, the line will be energized until the
breakers at both ends have opened.
290
tAutoEnerg and tManEnerg , is to ensure that the dead
IEC 61850
identification
SMBRREC
© Copyright 2017 ABB. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
79
5(0 -->1)
IEC15000204 V1 EN-US
1MRK 511 401-UUS F
IP14559-1 v6
M14890-1 v7
M12391-3 v8
Bay control REC670
Application manual