Connected shaft generator or shore connection
Activating the Close breaker command if a shaft generator is already connected to the busbar and Power take home is not activated
will start a load transfer from the connected 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 shaft generator breaker.
Activating the Close breaker command is a shore connection is already connected to the busbar will start a load transfer from the
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 shaft generator breaker.
More information
See SHAFT generator controller, Other SHAFT generator controller functions, Shaft generator load transfer
without parallel for more information.
10.3.3 Shaft generator breaker open flowchart
The following flowchart shows the sequence that the controller normally uses to open the shaft generator breaker (SGB). 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 SGB open command while Block is active, the controller uses the shaft generator breaker open sequence, shown
below, to open the SGB.
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). If, for example, the operator presses the push-button Open breaker on the display unit, the controller ignores
this command.
DESIGNER'S HANDBOOK 4189340911K UK Page 358 of 521
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