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Electrical Connections
11
2.1.4 Cable 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.
Figure 3 Input busbars
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
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.
CB
OUTPUT BYPASS
ACBA
Rectifier Input
Busbars
(Phases are
indicated by
letters below the
bars)
Output Busbars
(Phases are
indicated by
letters below the
bars)
Remove these links
for dual input
configuration and
wire UPS Main input
directly to CB1
Bussmann
MADE IN USA
150A 500V AC/DC
B
Bussmann
MADE IN USA
150A 500V AC/DC
B
Internal battery input
connections
Battery fuses
(fuses are behind
access plate on
front of UPS; see
Note on page 11)