9469200994 Rev — 17
DGC-2020ES Voltage and Current Sensing
Voltage and Current Sensing
The DGC-2020ES senses generator voltage, generator current, and bus voltage through dedicated,
isolated inputs.
Generator Voltage
The DGC-2020ES accepts either line-to-line or line-to-neutral generator sensing voltage over the range of
12 to 576 volts, rms line-to-line. Single-phase generator voltage is sensed across phases A and B.
Generator voltage sensing terminals are listed in Table 13.
Table 13. Generator Voltage Sensing Terminals
Neutral generator voltage sensing input
C-phase generator voltage sensing input
B-phase generator voltage sensing input
A-phase generator voltage sensing input
Bus Voltage
Bus sensing over the range of 12 to 576 volts rms line-to-line is accepted by the DGC-2020ES. Sensing
of bus voltage enables the DGC-2020ES to detect failures of the mains (utility). Controllers with style
number xx2 measure bus voltage sensing to perform automatic mains failure transfers. Single-phase bus
voltage is sensed across phases A and B. Bus voltage sensing terminals are listed in Table 14.
Table 14. Bus Voltage Sensing Terminals
A-phase bus voltage sensing input
B-phase bus voltage sensing input
C-phase bus voltage sensing input
Generator Current
The DGC-2020ES has sensing inputs for A-phase, B-phase, and C-phase generator current. Depending
on the style number, a DGC-2020ES has a nominal sensing current rating of 1 Aac or 5 Aac. A style
number of 1xx indicates 1 Aac nominal current sensing and a style number of 5xx indicates 5 Aac
nominal current sensing. Generator current sensing terminals are listed in Table 15.
Table 15. Generator Current Sensing Terminals
A-phase generator current sensing input
B-phase generator current sensing input
C-phase generator current sensing input
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