ABB RELION Series Technical Manual page 674

Section 9
Control functions
668
CB1 control logic
GUID-8C90B832-96F9-4E2F-BF1F-5CACEB75E09D V1 EN
Figure 351: Sub module diagram for CB1 control logic
Operation of the output signals is described in the table.
Table 674: Operating conditions for output signals of CB1
Output signal
OPEN_CB1
CLOSE_CB1
Activation of BLOCK input deactivates the outputs and resets the timers.
Operation description
If bus 1 is faulty and the CB1
position is closed, OPEN_CB1 is
activated after CB1 Trip delay
has expired.
Setting Main bus priority = "bus
2".
If CB1 position is closed and bus
2 is healthy, OPEN_CB1 is
Open CB1 delay
activated after
has expired.
Main bus priority = "bus
Setting
1".
If both CB1 and CB2 are open,
and bus 1 is healthy,
CLOSE_CB1 is activated after
Close CB1 delay has expired.
Operation is independent of the
state on bus 2.
Main bus priority = "bus
Setting
2".
If both CB1 and CB2 are open,
bus 2 is faulty and bus 1 is
healthy, CLOSE_CB1 is
Close CB1 delay
activated after
has expired.
1MRS758755 A
Operation type
Protection
Automatic reconnection
Automatic reconnection
Automatic transfer
REC615 and RER615
Technical Manual