Electrical Connections
2.1.4Cable Connections
The rectifier input, bypass and output are easily accessible from the left side of the unit for installa- tion. All require lug type terminations. They are connected to busbars on the left side of the NX and below the switch, as shown in Figure 3. These busbars are accessible when the left side panel is removed. Busbars to connect external batteries are accessible from the front of the UPS.
NOTE
External battery connection access requires removal of a protective panel on the lower front of the UPS to the left of the bottom two battery shelves.
Figure 3 Input busbars
Output Busbars (Phases are indicated by letters below the bars)
C B A C B A
OUTPUTBYPASS
Remove these links for dual input configuration and wire UPS Main input directly to CB1
Rectifier Input Busbars (Phases are indicated by letters below the bars)
The internal batteries are connected with Anderson connectors inside the battery compartment. The batteries are connected to fuses to protect the NX and connected equipment (see Figure 4).
Figure 4 Battery fuses and connections
150A 500V AC/DC
Bussmann
MADE IN USA
150A 500V
MADE IN USA
Internal battery input connections
Battery fuses (fuses are behind access plate on front of UPS; see Note on page 11)
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