ABB Relion 670 Series Applications Manual page 350

Section 15
Control
15.2.3.2 Auto recloser settings
The settings for the auto recloser are set using the local HMI (LHMI) or PCM600.
This setting guideline describes the settings of the auto recloser using the LHMI.
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 On or Off .
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-phase operation, then three-phase auto reclosing has to be chosen. This is usually the
case in sub-transmission and distribution lines. Three-phase 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-phase 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 Off 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
tLongStartInh . This start pulse duration time is controlled by the LongStartInhib setting. When
the start pulse 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
time.
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.
the
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 "reclaim 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
ZONESTEP input. The setting NoOfShots limits of course the possibility to increase the shot
number. This functionality is controlled by the setting
344
tAutoContWait . The normal setting is AutoContinue = Off .
On the start of the auto recloser is controlled by an circuit breaker auxiliary
tInhibit is used. The auto recloser will be blocked this time after the deactivation of
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On . Normally, the setting of tAutoContWait can be 2 sec.
tLongStartInh could be close to the auto reclosing dead
ZoneSeqCoord .
1MRK 511 401-UEN Rev. K
GUID-74980A07-CF89-488F-AB17-E5351D0032EE v1
INHIBIT input.
Bay control REC670
Application manual