ABB REC650 Applications Manual page 217

1MRK 511 286-UUS A
Application manual
FollowCB
The usual setting is Follow CB = Disabled. The setting Enabled can be used for delayed
reclosing with 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 NormOpen contact is
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 OCO (CB ready for an Open – Close – Open cycle), the condition is checked
only at the 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 CO (CB ready for a Close
– Open cycle) the 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 OCO
selection can be used. A breaker shall 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 be tPulse=200 ms. A longer pulse setting may facilitate dynamic indication at testing,
for example in "Debug" mode of PCM600 Application Configuration Tool (ACT) .
BlockByUnsucCl
Setting of whether an unsuccessful auto-reclose attempt shall set the Auto-Reclose in
block. If used the inputs BLKOFF must be configured to unblock the function after an
unsuccessful Reclosing attempt. Normal setting is Disabled.
UnsucClByCBCheck , Unsuccessful closing by CB check
The normal setting is NoCBCheck. The "auto-reclosing unsuccessful" event is then
decided by a new trip within the reset 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, CLOSECMD, one can set UnsucClByCBCheck= CB Check and set
tUnsucCl for instance to 1.0 s.
Section 10
Control
211