CB2 control logic
Figure 351: Sub module diagram for CB2 control logic
Operation of the output signals is described in the table.
Table 694: Operating conditions for output signals of CB2
Output signal Operation description Operation type
OPEN_CB2
If bus 2 is faulty and
the CB2 position is closed,
OPEN_CB2 is activated after
"CB2 Trip delay" has expired.
Protection
Setting
Main bus priority
=
“bus 1”.
If CB2 position is closed and
bus 1 is healthy, OPEN_CB2
is activated after "Open CB2
delay" has expired.
Automatic reconnection
CLOSE_CB2
Setting
Main bus priority
=
“bus 2”.
If both CB1 and CB2 are
open, and bus 2 is healthy,
CLOSE_CB2 is activated af-
ter
Close CB2 delay
has ex-
pired. Operation is independ-
ent of the state on bus 1.
Automatic reconnection
Setting Main bus priority =
“bus 1”.
Automatic transfer
Control functions 1MRS758755 C
694 REC615 & RER615
Technical Manual
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