ABB RELION Series, Technical Manual

Page: 675 / 804

CB2 control logic
GUID-58887722-274A-4EFE-B1AA-2EED602DB304 V1 EN
Figure 352: Sub module diagram for CB2 control logic
Operation of the output signals is described in the table.
Table 675: 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 after
Close CB2 delay has expired.
Operation is independent of the
state on bus 1.
Automatic reconnection
Setting
Main bus priority = “bus
1”.
If both CB1 and CB2 are open,
bus 1 is faulty and bus 2 is
healthy,
CLOSE_CB2
is
activated after Close CB2 delay
has expired.
Automatic transfer
Activation of
BLOCK
input deactivates the outputs and resets the timers.
1MRS758755 A
Section 9
Control functions
REC615 and RER615 669
Technical Manual