5.3.2 LOADING GENERATOR BUS
Once the generator closes its load switch, the generator bus is seen as available and the generator
bus LED illuminates.
In Manual Mode , the generator bus load switch is not closed until a ‘loading request’ is made.
A loading request can come from a number of sources, synchronising to the Mains if required:
• Press the Transfer to Generator Bus button
• Failure of mains supply
• High mains load (when the module is configured for an automatic peak lopping system)
• Activation of an auxiliary input that has been configured to Remote Start function.
• Activation of an auxiliary input that has been configured to Auxiliary Mains Failure.
• Activation of the inbuilt exercise scheduler if configured for ‘Parallel’ or ‘Island’ operation.
• Instruction from external remote telemetry devices using the RS232, RS485 or Ethernet
interface.
Load ramping takes place when appropriate, the DSE8661 controls the generator bus to provide the
configured power to the load and or mains supply.
5.3.2.1 BUS MODE
In this mode, the generator bus is used to provide a Fixed amount of active power (kW). This is set
using the DSE Configuration Suite Software in SCADA | Bus | MSC Link | Load Parallel Power
parameter.
How much reactive power provided depends upon the kV Ar or pf selection:
• kV Ar – The generator bus provides the number of kV Ar set in the Load Parallel V Ar
parameter. The power factor is variable in order to achieve this.
• pf – The generator bus produces power at the power factor set in the Load Power Factor
parameter. The kV Ar is variable in order to achieve this.
If all start requests are removed, the Stopping Sequence begins.
5.3.2.2 MAINS MODE
In this mode, the generator bus is used to provide a Variable amount of active power (kW), to
maintain the mains import or export levels at the configured values. This is set using the DSE
Configuration Suite Software in SCADA | Bus | MSC Link | Load Parallel Power parameter.
How much reactive power is taken from or exported to the mains depends upon the kV Ar or pf
selection:
• kV Ar – The generator bus is used to provide a fxied amount of kV Ar to maintain the mains
import or export V Ar at the level set in the Load Parallel V Ar parameter. The mains power
factor is variable in order to achieve this.
• pf – The generator bus is used to provide enough kV Ar to maintain the mains import or
export at the power factor configured into the Load Power Factor parameter. The mains kV Ar
is variable in order to achieve this.
As the load increases and decreases, generators on the generator bus may start and stop
automatically depending upon their configuration.
If all start requests are removed, the Stopping Sequence begins.
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