ABB Relion 670 Series Applications Manual page 314

Section 14
Control
The settings for the auto recloser are found under Main menu/Settings/IED Settings/Control/
AutoRecloser(79,5(0->1))/SMBRREC(79,5(0->)):X and have been divided into four different setting
groups: General, CircuitBreaker, DeadTime and MasterSlave.
General settings
Operation : The operation of the auto recloser can be switched Enabled or Disabled .
ExternalCtrl : This setting makes it possible to switch the auto recloser On or Off using an external
switch via IO or communication ports.
ARMode : There are six different possibilities in the selection of auto reclosing programs. The type
of auto reclosing used for different kinds of faults depends on the power system configuration
and the users practices and preferences. When the circuit breaker only have three-pole operation,
then three-pole auto reclosing has to be chosen. This is usually the case in sub-transmission and
distribution lines. Three-pole tripping and reclosing for all types of faults is also widely accepted in
completely meshed power systems. In transmission systems with few parallel circuits, single-pole
reclosing for single-phase faults is an attractive alternative for maintaining service and system
stability.
AutoContinue : Automatic continuation to the next shot if the circuit breaker is not closed within
the set time of
tAutoContWait : This is the length in time the auto recloser waits to see if the circuit breaker is
closed when AutoContinue is set to
StartByCBOpen : The normal setting Disabled is used when the function is started by protection
trip signals. If set
contact.
LongStartInhib : Usually the protection trip command, used as an auto reclosing start signal,
resets quickly as the fault is cleared. A prolonged trip command may depend on a circuit breaker
failing to clear the fault. A protection trip signal present when the circuit breaker is reclosed will
result in a new trip. The user can set a maximum start pulse duration time
start pulse duration time is controlled by the
duration signal is longer than set maximum start pulse duration, the auto reclosing sequence
interrupts in the same way as for a signal to the
tLongStartInh : The user can set a maximum start pulse duration time tLongStartInh . At a set time
somewhat longer than the auto reclosing dead time, this facility will not influence the auto
reclosing. A typical setting of
tInhibit : To ensure reliable interruption and temporary blocking of the auto recloser a resetting
time delay
INHIBIT input. A typical resetting delay is 5.0 s.
ZoneSeqCoord : The ZONESTEP input is used when coordination between local auto reclosers and
down stream auto reclosers is needed. When this input is activated the auto recloser increases its
actual shot number by one and enters "reset time" status. If a start is received during this reclaim
time the auto recloser is proceeding as usual but with the dead time for the increased shot
number. Every new increase of the shot number needs a new activation of the
The setting
functionality is controlled by the setting
308
tAutoContWait . The normal setting is AutoContinue = Disabled .
Enabled the start of the auto recloser is controlled by an circuit breaker auxiliary
tLongStartInh could be close to the auto reclosing dead time.
tInhibit is used. The auto recloser will be blocked this time after the deactivation of the
NoOfShots limits of course the possibility to increase the shot number. This
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Enabled . Normally, the setting of tAutoContWait can be 2 sec.
LongStartInhib setting. When the start pulse
INHIBIT input.
ZoneSeqCoord .
1MRK 511 401-UUS F
tLongStartInh . This
ZONESTEP input.
Bay control REC670
Application manual