4.4.3
Opening the shaft generator breaker
Control Procedure
PMS control
When the operator opens the shaft generator breaker, the power management system transfers the load
from the shaft generator to the gensets. There must therefore be enough gensets available, with enough
capacity to take over the shaft generator load.
To open the shaft generator breaker:
1. Operator action: Press to open the shaft generator breaker.
a. System response: The power management system calculates whether there will be enough power
available after the shaft generator breaker is opened. If not, the power management system will not
allow the shaft generator breaker to open, and the controller display unit will show an info
message.
• If GENSET controllers in AUTO mode are ready for operation, but not connected, the power
management system starts and connects the required gensets so that the required power is
available.
• If the gensets do not have the capacity to take over the shaft generator load, the controller does
not open the shaft generator breaker, and displays an info message.
b. System response: The power management system de-loads the shaft generator breaker. During
de-loading, the breaker LED is yellow (flashing).
c. System response: When the shaft generator breaker is de-loaded, the controller opens the shaft
generator breaker. When the breaker is open, the breaker LED is OFF.
• If the shaft generator breaker is not de-loaded, the breaker does not open. The de-load failure
alarm is activated when the de-load timer expires.
Switchboard
control
When the controller is under switchboard control, the display unit push-buttons are disabled. The shaft
generator breaker can only be opened using the switchboard.
4.5 SHORE connection controller basic actions
4.5.1 Introduction to operating the SHORE connection controller
Normal operation
The SHORE connection controller normally runs under power management system (PMS) control.
Blackout response
If there is a blackout, the PMS automatically follows the blackout recovery sequence to start and connect gensets, in order to
restore power. If this does not succeed, as part of the blackout recovery, if auto close is enabled, the PMS attempts to close
the shore connection breaker. No operator actions are needed.
However, if there is a blackout while the SHORE connection controller is under switchboard control, the PMS will not attempt
to connect the shore connection. If the operator wants the PMS to connect the shore connection, the operator needs to
change the switchboard control selector to PMS control.
Parallel operation
The shore connection can run in parallel with the diesel gensets to transfer the load. However, the shore connection will not
normally run in parallel with the diesel gensets.
PPM 300 Operator's manual 4189340910 UK
www.deif.com Page 49 of 157
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