DSE 8610 MKII, Руководство оператора, Страница: 121 / 188

Operation
Page 121 of 188 057-254 ISSUE: 2
5.7 ALTERNATIVE CONFIGURATIONS
Depending upon the configuration of the system by the generator supplier, the system may have
selectable configurations (for example to select between 50 Hz and 60 Hz). If this has been enabled
the generator supplier will advise how this selection can be made (usually by operating an external
selector switch or by selecting the required configuration file in the module’s front panel configuration
editor).
5.8 DUMMY LOAD / LOAD SHEDDING CONTROL
If the load is low, ‘dummy loads’ (typically resistive load banks) are introduced to ensure the engine is
not too lightly loaded. Conversely, as the load increases towards the maximum rating of the set, non-
essential loads are shed to prevent overload of the generator.
5.8.1 DUMMY LOAD CONTROL
The Dummy Load Control feature (if enabled) allows for a maximum of five dummy load steps. When
the set is first started, all configured Dummy Load Control outputs are de-energised. Once the
generator is placed onto load, the generator loading is monitored by the Dummy Load Control
scheme.
If the generator loading falls below the Dummy Load Control Trip setting (kW), the Dummy Load
Control Trip Delay begins. If the generator loading remains at this low level for the duration of the
timer, the first Dummy Load Control output is energised. This is used to energise external circuits to
switch in a resistive load bank.
The first dummy load has increased the generator loading. Again, the generator loading is monitored.
This continues until all configured Dummy Load Control outputs are energised.
When the generator loading rises above the Dummy Load Return level, the Dummy Load Return
Delay begins. If the generator loading remains at these levels after the completion of the timer, the
‘highest’ active Dummy Load Control output is de-energised. This continues until all Dummy Load
Control outputs have been de-energised.
When the generator enters a stopping sequence for any reason, all the Dummy Load Control outputs
de-energise at the same time as the generator load switch is signalled to open.
Example screen shot of Dummy Load Control setup in the DSE Configuration Suite