Basler Electric DGC-2020HD - Manual (Page 63)

9469300990 Rev B 53
Voltage and Current Sensing
The DGC-2020HD senses generator voltage, generator current, and bus voltage through dedicated,
isolated inputs.
Generator Voltage
The DGC-2020HD accepts either line-to-line or line-to-neutral generator sensing voltage over the range of
12 to 576 volts rms L-L (7 to 333 volts rms L-N). Single-phase generator voltage is sensed across phases
A and B. Generator voltage sensing terminals are listed in Table 22.
Table 22. Generator Voltage Sensing Terminals
Terminal Description
86 (GEN VA) A-phase generator voltage sensing input
88 (GEN VB) B-phase generator voltage sensing input
90 (GEN VC) C-phase generator voltage sensing input
91 (GEN VN) Neutral generator voltage sensing input
Bus Voltage
Sensing of bus voltage enables the DGC-2020HD to detect failures of the mains (utility). The DGC-
2020HD accepts bus sensing over the range of 12 to 576 volts rms L-L (7 to 333 volts rms L-N).
Controllers with style number xxx2xxxxx measure bus voltage sensing to perform automatic
synchronization of the generator with the bus. Single-phase bus voltage is sensed across phases A and
B. Bus voltage sensing terminals are listed in Table 23.
Table 23. Bus Voltage Sensing Terminals
Terminal Description
93 (BUS 1 VA) Bus 1 A-phase voltage sensing input
95 (BUS 1 VB) Bus 1 B-phase voltage sensing input
97 (BUS 1 VC) Bus 1 C-phase voltage sensing input
98 (BUS 1 VN) Bus 1 Neutral voltage sensing input
100 (BUS 2 VA) Bus 2 A-phase voltage sensing input
101 (BUS 2 VB) Bus 2 B-phase voltage sensing input
103 (BUS 2 VC) Bus 2 C-phase voltage sensing input
104 (BUS 2 VN) Bus 2 Neutral voltage sensing input
Generator and Bus Current
The DGC-2020HD has sensing inputs for A-phase, B-phase, and C-phase generator current. One, or up
to four (optional), user-programmable CTs are provided for sensing current on bus 1, optional bus 2, and
generator ground current. Depending on the style number, a DGC-2020HD has a nominal sensing current
rating of 1 Aac or 5 Aac. A style number of 1xxxxxxxx indicates 1 Aac nominal current sensing and a style
number of 5xxxxxxxx indicates 5 Aac nominal current sensing. Generator current sensing terminals are
listed in Table 24 and load bus current sensing terminals are listed in Table 25.
DGC-2020HD Voltage and Current Sensing