Basler Electric DGC-2020 - Manual (Page 150)

and Low Line Override programmable functions are set automatically as indicated by the detected Line to
Line voltages.
When single-phase operation is detected, the DGC-2020 switches to single-phase A-B or single-phase
A-C configuration, as specified by the Single Phase Detect Generator Connection setting.
There is a one-second delay in the detection to prevent the DGC-2020 from alternating between detected
configurations. When the DGC-2020 is in the OFF mode or the engine is not running, the Automatic
Configuration Detection is disabled. The DGC-2020 is assumed to be in the last valid automatically
detected configuration.
It is recommended that the following programmable functions and logic element are not mapped to
contact inputs when Automatic Configuration Detection is enabled.
•
Single Phase Override programmable function
•
Single Phase AC Sense Override programmable function
•
Low Line Override programmable function
•
Single Phase Override logic element
Single Phase Detect Threshold. B If the difference between the maximum and minimum L-L voltage
exceeds this threshold, the unit will be auto detected to be in single-phase configuration. Single-phase
detection sets the Single Phase Override programmable function and/or the Single Phase AC Override
programmable function to force the DGC-2020 into the appropriate single-phase mode as specified by the
Single Phase Detection Generator Connection setting. If contact inputs are also mapped to the Single
Phase Override and Single Phase AC Sense Override programmable functions, the results of the
Automatic Configuration Detection will be ORed with what is indicated by the contact inputs.
Low Line Detect Threshold. C If the average of the valid L-L voltages for the detected configuration is
above this threshold, the unit will be auto detected as being in a high line configuration. If the average is
below this threshold, it will be auto detected as being in a low-line configuration. When detected to be in a
low-line configuration, the detection will set the Low Line Override programmable function to force the
DGC-2020 into the low-line configuration. If contact inputs are also mapped to the Single Phase Override
and Low Line Override programmable function, the results of the Automatic Configuration Detection will
be ORed with what is indicated by the contact inputs.
Single Phase Detect Generator Connection. D This setting specifies whether the machine should go into a
single-phase AC or single-phase AB configuration when the machine is detected to be in a single-phase
configuration.
The BESTCOMSPlus Auto Config Detection screen is illustrated in Figure 4-33.
Figure 4-33. Auto Config Detection
A Auto Config Detection: Enable or Disable.
B Single Phase Detect Threshold: Adjustable from 0 to 480 V in 1 V increments.
C Low Line Detect Threshold: Adjustable from 0 to 480 V in 1 V increments.
D Single Phase Detect Generator Connection: A-B or A-C.
Programmable Inputs
DGC-2020 programmable inputs can be assigned to trigger various functions and, when triggered,
annunciate an alarm or pre-alarm. A user-assigned label can be assigned to each input to make
identification easier. The description of these settings is organized as follows:
4-40 DGC-2020 BESTCOMSPlus
® Software
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