Protections
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6.5.3 ENGINE RUNNING
Once the engine is running, the Warm Up timer, if selected, begins, allowing the engine to stabilise before
accepting the load.
If the common bus is measured to be ‘dead bus’, the load breaker is closed.
If the bus is measured to be ‘live bus’, synchronising takes place before the breaker is closed.
NOTE:-The load transfer signal remains inactive until the Oil Pressure has risen. This prevents
excessive wear on the engine.
As the load increases and decreases, the DSE86xx series module (may (depending upon configuration) add
dummy loads or remove non-essential loads. This is configured as part of the Load Shedding and Dummy Load
control settings in the DSE Configuration Suite Software.
See section entitled Dummy Load / Load Shedding elsewhere in this document for further details.
Additionally, when configured as part of a multiset package, the generator may be automatically started and
stopped depending upon load requirements.
If in doubt, consult your system supplier for details of how your particular system has been configured.
If all start requests are removed, the stopping sequence will begin.
6.5.4 STOPPING SEQUENCE
The return delay timer operates to ensure that the starting request has been permanently removed and is not just
a short-term removal. Should another start request be made during the cooling down period, the set will return on
load.
If there are no starting requests at the end of the return delay timer, the load is ramped off the generator being the
breaker is opened and the cooling timer is initiated.
The cooling timer allows the set to run off load and cool sufficiently before being stopped. This is particularly
important where turbo chargers are fitted to the engine.
If the set is called to return to load before the cooling timer has expired, the Engine Running operation is again
followed.
After the cooling timer has expired, the set is stopped.
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