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Controls and Indications

Part No. 057-120 8660 OPERATING MANUAL ISSUE 1 07/05/2010 ADM

6.3.3 ENGINE RUNNING

Once the generator bus becomes available, the load is transferred. If required, the generator bus is first

synchronised with the mains supply. This operation is automatic, using the MSC data link.

Load ramping takes place when appropriate, the DSE8660 controls the generator(s) bus to provide the configured

power to the load and/or mains supply.

6.3.3.1 BUS MODE

In this mode, the generator(s) are used to provide a fixed amount of active power (kW), this is configured into the

Load parallel power parameter.

How much reactive power is provided depends upon the kVAr/pf selection:

 KVAr – The generator(s) will provide the number of KVAr configured into the Load Parallel VAr parameter. The

power factor is variable in order to achieve this.

 Pf – The generator(s) will product power at the power factor configured into the Load power factor parameter.

The kVAr is variable in order to achieve this.

6.3.3.2 MAINS MODE

In this mode, the generator(s) are used to provide a variable amount of active power (kW), to maintain the mains

import/export levels at the configured values. This is configured into the Load parallel power parameter.

How much reactive power is taken from or exported to the mains depends upon the kVAr/pf selection:

 KVAr – The generator(s) will be used to provide enough kVAr to keep the mains import/export VAr at the level

configured into the Load Parallel VAr parameter. The mains power factor is variable in order to achieve this.

 Pf – The generator(s) will be used to provide enough kVAr to keep the mains import/export at the power factor

configured into the Load power factor parameter. The mains kVAr is variable in order to achieve this.

As the load increases and decreases, sets may automatically start and stop, depending upon their configuration.

If all start requests are removed, the stopping sequence will begin.

6.3.4 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.

If there are no starting requests at the end of the return delay timer, the load is transferred back from the generator

bus to the mains supply and the start request is removed from the engine(s).

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Brainboxes PX-246 Spécifications Page 57