If the GENSET controllers are in SEMI mode, after the shore connection is connected, the GENSET controllers will not disconnect
the gensets. However, the parallel timer starts when the shore controller is connected. For the default configuration, the GENSET
controller trips the genset breaker when the timer expires.
Connected shore connection or shaft generator
Activating the Close breaker command if a shore connection is already connected to the busbar and Multiple shore connections
allowed is not activated will start a load transfer from the connected shore connection to gensets under PMS control. After the load
is transferred, the controller will follow the procedure described in the table above to close the shore connection breaker.
Activating the Close breaker command if a shaft generator is already connected to the busbar will start a load transfer from the shaft
generator to gensets under PMS control. After the load is transferred, the controller will follow the procedure described in the table
above to close the shore connection breaker.
11.3.3 Shore connection breaker open flowchart
The following flowchart shows the sequence that the controller normally uses to open the shore connection breaker (SCB). This
sequence is also used for the alarm action PMS-controlled open breaker.
The alarm action Block does not open a closed breaker, although it stops an open breaker from closing. If the controller or an
operator sends an SCB open command while Block is active, the controller uses this sequence.
This flowchart does not apply to switchboard control. When the controller is under switchboard control, it will not open the breaker
(except for a trip caused by an alarm). If, for example, the operator presses the push-button Open breaker on the display unit,
the controller ignores this command.
CAUTION
If the Breaker action parameter is set to Open without de-loading or if the operator selects to open the breaker without de-
loading, it is possible to over-load the remaining breakers after the selected breaker opens. It is recommended to only open
breakers without de-loading them first, if the operator understands all of the risks and consequences of this action.
DESIGNER'S HANDBOOK 4189340911K UK Page 383 of 521
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