Basler DGC-2020HD - Voltage Sensing Terminals

2-4 9469300994
Terminals and Connectors DGC-2020HD
Caution
Current sensing terminals 2 (IA–), 4 (IB–), 6 (IC–), 8(AUX I1–), 10
(AUX I2–), 12 (AUX I3–), and 14 (AUX I4–) must be terminated to
ground for proper operation.
Note
Unused current sensing inputs should be shorted to minimize noise
pickup.
Generator Voltage Sensing
The DGC-2020HD accepts either line-to-line or line-to-neutral generator sensing voltage over the range
of 0 to 576 volts, rms line-to-line or 0 to 333 volts, rms line-to-neutral. Generator voltage sensing terminals
are listed in Table 2-5.
Table 2-5. 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
Installation in an Ungrounded System Application
When the DGC-2020HD is controlling equipment that is part of an ungrounded system, it is
recommended that potential transformers be employed on the voltage sensing inputs to provide full
isolation between the DGC-2020HD and monitored voltage phases.
Bus Voltage Sensing
Sensing of bus voltage enables the DGC-2020HD to detect failures of the mains (utility). Controllers with
style number xxx2xxxxx use bus voltage sensing to perform automatic synchronization of the generator
with the bus. The DGC-2020HD accepts either line-to-line or line-to-neutral bus sensing voltage over the
range of 0 to 576 volts, rms line-to-line or 0 to 333 volts, rms line-to-neutral. Controllers with style number
xxxxxxxEx are equipped with two bus sensing inputs. One is intended for sensing the mains voltage while
the other is intended for sensing the load bus voltage.
Bus voltage sensing terminals are listed in Table 2-6.
Table 2-6. Bus Voltage Sensing Terminals
Terminal
Description
93 (BUS1 VA)
A-phase bus voltage sensing input
95 (BUS1 VB)
B-phase bus voltage sensing input
97 (BUS1 VC)
C-phase bus voltage sensing input
98 (BUS1 VN)
Neutral bus voltage sensing input
100 (BUS2 VA)
A-phase bus voltage sensing input (optional)
101 (BUS2 VB)
B-phase bus voltage sensing input (optional)
103 (BUS2 VC)
C-phase bus voltage sensing input (optional)
104 (BUS2 VN)
Neutral bus voltage sensing input (optional)