Input Wiring (Tb1); Output Wiring (Tb3); Without Transformer; With Transformer - Liebert Nfinity User Manual

Input Wiring (TB1)

To connect the input wiring, follow these steps:
Note: Input wiring must be installed using conduit.
1. Locate the input
wiring access,
remove the
knockout and
pull the three
input wires
through it,
allowing some
slack for
installation.
2. Secure the
conduit to the rear panel of the UPS.
3. Input Power cables connect to screw terminals
on the Input Terminal Block located to the right
of the Bypass Voltage Terminal. First insert the
earth wire through the earth lug and tighten it
to the proper torque value 2.5 - 3.0 Nm
(22 - 26 in-lb). Then connect the wires to the
block connections as shown below. Using a
torque wrench, turn the screws clockwise until
tightened to the proper torque value.
TB1
U
V
W
N
Note
R phase connects to U terminal
S phase connects to V terminal
T phase connects to W terminal

Output Wiring (TB3)

Without transformer

TB3
230V/240V

With transformer

TB3
230V/240V
220V
Note the Neutral / Earth jumper on the terminal above.
TRANSFORMER MODELS
The Nfinity UPS contains an isolation
transformer that generates a neutral conductor
for the connected equipment. The UPS is a
separately derived source and contains a
neutral to earth bonding jumper. Remove this
earth/neutral link when required by local
electrical codes.
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