ABB RELION 650 Series Applications Manual page 237

1MRK 505 363-UEN A
FollowCB
The usual setting is
long delay, to cover the case when a CB is being manually closed during the "auto-reclosing
open time" before the auto-reclosing function has issued its CB closing command.
tCBClosedMin
A typical setting is 5.0 s. If the CB has not been closed for at least this minimum time, a
reclosing start will not be accepted.
CBAuxContType , CB auxiliary contact type
It shall be set to correspond to the CB auxiliary contact used. A
recommended in order to generate a positive signal when the CB is in the closed position.
CBReadyType , Type of CB ready signal connected
The selection depends on the type of performance available from the CB operating gear. At
setting
start of the reclosing cycle. The signal will disappear after tripping, but the CB will still be able
to perform the C-O sequence. For the selection
condition is also checked after the set auto-reclosing dead time. This selection has a value first
of all at multi-shot reclosing to ensure that the CB is ready for a C-O sequence at shot 2 and
further shots. During single-shot reclosing, the
according to its duty cycle always have storing energy for a CO operation after the first trip.
(IEC 56 duty cycle is O-0.3sec CO-3minCO).
tPulse , Breaker closing command pulse duration
The pulse should be long enough to ensure reliable operation of the CB. A typical setting may
tPulse=200 ms . A longer pulse setting may facilitate dynamic indication at testing, for
be
example, in "Debug" mode of Application Configuration tool (ACT). In CBs without anti-
pumping relays, the setting
when reclosing onto a fault. A new start will then cut the ongoing pulse.
BlockByUnsucCl
Setting of whether an unsuccessful auto-reclose attempt shall set the Auto-Reclose in block. If
used the inputs BLOCKOFF must be configured to unblock the function after an unsuccessful
Reclosing attempt. Normal setting is
UnsucClByCBCheck , Unsuccessful closing by CB check
The normal setting is
a new trip within the reclaim time after the last reclosing shot. If one wants to get the
UNSUCCL (Unsuccessful closing) signal in the case the CB does not respond to the closing
command, CLOSECB, one can set
to 1.0 s.
Priority and time tWaitForMaster
In single CB applications, one sets
first CB, e.g. near the busbar, is set
maximum waiting time,
reclosing open time" and a margin for synchrocheck at the first CB. Typical setting is
tWaitForMaster=2sec .
Application manual
Follow CB = Off . The setting On can be used for delayed reclosing with
OCO (CB ready for an Open – Close – Open cycle), the condition is checked only at the
CutPulse = On can be used to avoid repeated closing operation
NoCBCheck . The "auto-reclosing unsuccessful" event is then decided by
tWaitForMaster of the second CB is set longer than the "auto-
CO (CB ready for a Close – Open cycle) the
OCO selection can be used. A breaker shall
Off .
UnsucClByCBCheck = CB Check and set tUnsucCl for instance
Priority = None . At sequential reclosing the function of the
Priority = High and for the second CB Priority = Low . The
NormOpen contact is
Section 12
Control
231