4.2.7
Setting genset start and stop priority
For efficiency or maintenance reasons, you might want certain gensets to automatically run as much as possible, and others
to run at little as possible. The power management system has a priority order for the gensets to enable you to do this. If a
genset start is needed, the power management system starts the first non-running genset in the priority order. Similarly, if a
genset stop is needed, the power management system stops the last running genset in the priority order.
The operator can determine the genset priority. Alternatively, the power management system determines the genset priority.
Press
on a GENSET controller display unit to manually move its genset to the first position in the priority order. The
LED next to lights when a GENSET controller has first priority.
See Configure, Priority, View or configure priority for more information about how to change the priority for
multiple controllers.
4.3 EMERGENCY genset controller basic actions
4.3.1 Introduction to operating the EMERGENCY genset controller
Normal operation
The EMERGENCY genset controller is normally in AUTO mode. During normal operation, apart from emergency genset
tests, the emergency genset does not run.
Blackout response
If there is a blackout, the power management system automatically follows the blackout recovery sequence to start and
connect gensets, in order to restore power. If the gensets do not supply power within the time allowed (the default is 30
seconds), the power management system automatically opens the tie breaker, starts the emergency genset and closes the
emergency genset breaker.
If there is a blackout and the EMERGENCY genset controller is in SEMI mode, the controller automatically changes to AUTO
mode. No operator actions are needed.
However, if there is a blackout while the EMERGENCY genset controller is under switchboard control, the power
management system does not attempt to start or connect the emergency genset. If the operator wants the power
management system to start and connect the emergency genset, the operator needs to change the switchboard control
selector to PMS control.
Harbour operation
When harbour operation is active, the emergency genset breaker and the tie breaker are closed. The emergency genset
runs, and supplies power as if it were an ordinary diesel genset. The power management system controls the system, and
starts and stops the other gensets as needed. When harbour operation is active, the emergency genset is first in the genset
priority order, and is therefore always running and connected when the EMERGENCY genset controller is in AUTO mode.
4.3.2 Changing modes
The EMERGENCY genset controller can run in AUTO or SEMI mode, or under switchboard control. The EMERGENCY
genset controller can also run a test sequence (see Emergency genset test function).
PPM 300 Operator's manual 4189340910 UK
www.deif.com Page 41 of 157
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