Basler DGC-2020ES Configuration Instruction Manual page 63

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Figure 5-6. Settings Explorer, System Parameters, Exercise Timer Screen
Sensing Transformers
Three sets of transformer settings configure the DGC-2020ES for operation with a specific system. These
settings, along with the generator voltage, generator current, and bus voltage detected by the DGC-
2020ES, enable it to accurately meter system values and offer generator protection.
The Sensing Transformers screen is found in the BESTCOMSPlus Settings Explorer under the System
Parameters category. If using the front panel, navigate to Settings > System Parameters > Sensing
Transformers.
When adjusting these settings using BESTCOMSPlus, click the Rated Data button. See Rated Data,
above, for more information.
Generator PT
The generator PT settings establish the nominal primary (generator side) and secondary (DGC-2020ES
side) voltage levels at the generator voltage-sensing transformer. The Generator PT Primary setting
accepts values from 1 to 999,999, in increments of 1. The Generator PT Secondary setting accepts
values from 1 to 480, in increments of 1.
Bus PT
Primary and secondary bus transformer ratings are used by the optional automatic transfer switch
function. This function monitors a three-phase bus input to detect mains failure. The primary setting
establishes the nominal voltage present at phases A, B, and, C of the bus. This setting accepts values
from 1 to 99,999, in increments of 1. The secondary setting establishes the nominal voltage detected at
the bus voltage input of the DGC-2020ES. This setting accepts values from 1 to 480, in increments of 1.
Generator CT
The generator CT setting establishes the nominal, primary (generator side) current level at the generator
current sensing transformer. This setting accepts values from 1 to 9,999, in increments of 1. The
secondary value of the generator CT is dictated by the style number of the controller. A DGC-2020ES
with a style number of 1xx uses a nominal CT secondary rating of 1 Aac. A DGC-2020ES with a style
number of 5xx uses a nominal CT secondary rating of 5 Aac.
DGC-2020ES Device Configuration