Auto Recloser Settings - ABB REC670 Applications Manual

1MRK 511 401-UEN A
14.2.3.2
Bay control REC670 2.2 IEC
Application manual

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. The normal setting is AutoContinue =
Off.
tAutoContWait: This is the length in time the auto recloser waits to see if the circuit
breaker is closed when AutoContinue is set to On. Normally, the setting of
tAutoContWait can be 2 sec.
StartByCBOpen: The normal setting Off is used when the function is started by
protection trip signals. If set On the start of the auto recloser is controlled by an
circuit breaker auxiliary 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 INHIBIT input.
tLongStartInh: The user can set a maximum start pulse duration time
tLongStartInh. At a set time somewhat longer than the auto reclosing dead time,
Section 14
Control
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