Brainboxes PX-246 Especificaciones descargar pdf (Pagina 55)

Operation

6.3 LOAD SHEDDING CONTROL

This feature may be enabled by the system designer to ensure the loading on S2 is kept to a nominal

amount. Conversely as the load increases towards the maximum rating of the set, non-essential loads

can be shed to prevent overload of S2.

6.2.2 LOAD SHEDDING CONTROL

The Load Shedding Control feature (if enabled) allows for a maximum of five load shedding steps.

When S2 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 S2 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 S2.

S2 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 S2 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 S2 load switch is signalled to open.

NOTE:

NOTE:NOTE:

NOTE:-

Refer to DSE335 Configuration Suite Manual (DSE part 057

Refer to DSE335 Configuration Suite Manual (DSE part 057Refer to DSE335 Configuration Suite Manual (DSE part 057

Refer to DSE335 Configuration Suite Manual (DSE part 057-

-157) for further

157) for further 157) for further

157) for further

details on configuring, monitoring and control.

details on configuring, monitoring and control.details on configuring, monitoring and control.

details on configuring, monitoring and control.

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Brainboxes PX-246 Especificaciones Pagina 55