Winco DSE7300 Series - Manual (Page 73)

DSE Model 7000 Series Control & Instrumentation System Operators Manual
Part No. 057-074 7000 Series OPERATING MANUAL ISSUE 5 15/10/2009 ADM 73
6.2.2 LOAD SHEDDING CONTROL
The Load Shedding Control feature (if enabled) allows for a maximum of five load shedding steps.
When the generator is about to take load, the configured number of Load Shedding Control Outputs at Startup will
energise. This configurable setting allows (for instance) certain loads to be removed from the generator prior to the
set’s load switch being closed. This can be used to ensure the initial loading of the set is kept to a minimum, below
the Load Acceptance specification of the generating set.
The generator is then placed on load. The Load Shedding Control scheme begins.
When the load reaches the Load Shedding Trip level the Trip Delay timer will start. If the generator loading is still
high when the timer expires, the first Load shedding Control output will energise. When the load has been above the
trip level for the duration of the timer the ‘next’ Load shedding Control output will energise and so on until all Load
Shedding Control outputs are energised.
If at any time the load falls back below the Load Shedding Return level, the Return Time will start. If the load
remains below the return level when the timer has expired the ‘highest’ Load Shedding Control output that has been
energised will be de-energised. This process will continue until all outputs have been de-energised.
When the set enters a stopping sequence for any reason the Load Shedding control’ outputs will de-energise at the
same time as the generator load switch is signalled to open.
Example screen shot of Load Shedding Control setup in the DSE Configuration Suite