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 Off.
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 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 UnsucClByCBCheck= CB
Check and set tUnsucCl for instance to 1.0 s.
Priority
and time
tWaitForMaster
In single CB applications, one sets Priority = None. At sequential reclosing the
function of the first CB, e.g. near the busbar, is set Priority = High and for the second
CB Priority = Low. The maximum waiting time, tWaitForMaster of the second CB is
set longer than the “auto-reclosing open time” and a margin for synchrocheck at the
first CB. Typical setting is tWaitForMaster=2secat the energizing side and perhaps
15 or 300 seconds at the synchrocheck , synchronizing side.
Section 10 1MRK 505 291-UEN A
Control
210
Application manual
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