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 shaft generator breaker. No operator actions are needed.
However, if there is a blackout while the SHAFT generator controller is under switchboard control, the PMS will not attempt to
connect the shaft generator. If the operator wants the PMS to connect the shaft generator, the operator needs to change the
switchboard control selector to PMS control.
Parallel operation
The shaft generator can run in parallel with the diesel gensets to transfer the load. However, the shaft generator will not
normally run in parallel with the diesel gensets.
Power take home function
When the power take home function is active, the diesel gensets supply the power, and the shaft generator is used as a
motor.
4.4.2 Closing the shaft generator breaker
Control Procedure
PMS control
When the operator closes the shaft generator breaker, the power management system transfers the load
from the gensets to the shaft generator. The shaft generator must therefore be running and have enough
capacity to take over the genset load.
To close the shaft generator breaker:
1. Operator action: Press to close the shaft generator breaker.
a. System response: The power management system synchronises the busbar with the shaft
generator. During synchronisation, the breaker LED is yellow (flashing).
b. System response: When the shaft generator and busbar are synchronised, the controller closes
the breaker. When the breaker is closed, the breaker LED is green.
• If the shaft generator and busbar are not synchronised before the synchronisation timer expires,
the breaker does not close. The synchronisation failure alarm is activated.
• If the shaft generator does not have the capacity to take over the genset load, the controller does
not close the shaft generator breaker, and displays an info message.
c. System response: After the shaft generator breaker is closed, the power management system
automatically de-loads and opens the genset breakers of all the GENSET controllers that are in
AUTO mode. After the genset cooldown period, the power management system then automatically
stops the gensets of all the GENSET controllers that are in AUTO mode.
Switchboard
control
When the controller is under switchboard control, the display unit push-buttons are disabled. The shaft
generator breaker can only be closed using the switchboard.
PPM 300 Operator's manual 4189340910 UK
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