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Installation and Configuration
16
5.3.1 Distribution Box Electrical Connections
Electrical connections are made through a removable power distribution box that attaches to the rear
of the UPS.
The installer must provide an upstream branch circuit breaker. The input circuit breaker on the
distribution box and the output circuit breaker on the rear of the power distribution box disconnect all
power between the main cabinet and the distribution box.
Models equipped with a manual bypass breaker pass bypass power directly to the bypass breaker
from the input terminal block. The input circuit breaker on the distribution box does not disconnect
power from the manual bypass breaker.
Figure 10 Distribution box electrical connections diagram
HardwireTerminal Block Connections
Conduit entry holes are provided on the rear and side of the box. Input and output wiring should not
share the same conduit. Emerson recommends using strain relief when installing the wire.
Table 1 Branch circuit breaker ratings
Unit Rating Maximum Breaker Rating
5000VA D Type 35A
Table 2 Electrical specifications
UPS Model
Recommended
(Maximum) External
Overcurrent Protection
Recommended Wire
(Including ground wire)
(75°C copper wire)
Maximum Wire
Accepted by
Terminal Block
Terminal
Tightening
Torque
Liebert GXT3
5000RT230U
35A 4mm
2
(10AWG) 6mm
2
(8AWG) 1.13 Nm (10 in-lb)
NOTE
The installer must provide circuit breaker protection according to local codes. The mains
disconnect should be within sight of the UPS or have appropriate an appropriate lock-out.
Maintain service space around the UPS or use flexible conduit.
The installer must provide output distribution panels, circuit breaker protection or emergency
disconnects according to local codes. Output circuits must not share a common conduit with
any other wiring.
UPS-PFC,
Battery Inverter
MB CB
Input
CB
Output
CB
Input
External
Branch CB
Output
Mains
L1
OUTPUT INPUT
L2/ N L2/ NL1
L1
OUTPUT INPUT
L2/ N L2/ NL1
For 120V input, connect
the L1,L2 inputs as shown at right
For 230V input, connect
the L1, L2 inputs as shown at right