Basler Electric DGC-2020HD - Manual (Page 281)

9469300990 Rev B 271
Sensing Transformer Ratings
BESTCOMSPlus Navigation Path: Settings Explorer, System Parameters, Sensing Transformers
Front Panel Navigation Path: Settings > System Parameters > Sensing Transformers
Sensing transformer settings configure the DGC-2020HD for operation with a specific system. These
settings, along with the generator voltage, generator current, bus voltage, and bus current detected by the
DGC-2020HD, enable it to accurately meter system values and offer generator protection.
Figure 174 illustrates the BESTCOMSPlus Sensing Transformers screen. To edit rated data settings for
the generator, bus 1, or optional bus 2, click the Rated Data button found on this screen. Upon clicking
the Rated Data button, the floating Rated Data screen appears. All rated data settings for generator, bus
1, and optional bus 2 can be configured here. Figure 169 illustrates the floating Rated Data screen.
Settings are listed in Table 77.
Aux CT Mapping
DGC-2020HD controllers with style number xxxxxxxBx have one auxiliary CT and controllers with style
number xxxxxxxEx have four. Specify the mappings for each auxiliary CT using these settings.
Ground Current
Ground Current auxiliary CT settings establish the nominal, primary (bus side) current level at the ground
current sensing transformer. This setting accepts values from 1 to 99,999, in increments of 1. The
secondary value of the ground current sensing CT is dictated by the style number of the controller. A
DGC-2020HD with a style number of 1xxxxxxxx uses a nominal CT secondary rating of 1 Aac. A DGC-
2020HD with a style number of 5xxxxxxxx uses a nominal CT secondary rating of 5 Aac.
DGC-2020HD Configuration