DKG-329 User Manual V-12 (09.10.2012)
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The load shedding feature consists on the disconnection of the least crucial loads when the
genset power approaches to its limits. These loads will be supplied again when the genset power falls
below the programmed limit. The internal Load Shedding function is always active. Any of the auxiliary
relays may be used as the load shedding output.
The dummy load function consists on the connection of a dummy load if the total genset load is
below a limit and to disconnection of the dummy load when the total power exceeds another limit. The
dummy load function is the inverse of the load shedding function, thus the same output may be used for
both purposes.
The parameters used in Load Shedding feature are in the Electrical Parameters Group:
Load Shedding Low Limit: If the genset active power output goes below this limit, then the Load
Shedding relay will be deactivated.
Load Shedding High Limit: If the genset active power output goes above this limit, then the Load
Shedding relay will be activated.
The unit offers possibility of updating the firmware in the field. The firmware is updated through
the RS-232 serial port using Rainbow or a special DOS program.
The unit will go to firmware download mode with a special command from the PC program. In
download mode, the display of the unit will show “DL-V1.00”
During firmware update process, the progress is visible through a completion bar on the screen.
The firmware update operation will take around 3 minutes.
After completion of the update a special command will set back the unit to normal operation
mode.
The controller is able to provide a pre-transfer digital output function.
This function is designed for elevator systems, in order to bring the cabin to a floor and open cabin
doors before transfer.
The duration where this output is active is adjusted with the Pre-Transfer Delay parameter.
The Pre-Transfer signal may be assigned to any digital output.
If the Pre-transfer Delay parameter is not zero, this will delay
transfers by the same amount.
7.16. Pre-Transfer Signal
7.14. Load Shedding / Dummy Load
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