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Installation
8
3.0 INSTALLATION
3.1 Electrical preparations
Before beginning installation, the input source must be isolated and locked out to prevent connection
during installation. The input circuit breaker on the rear of the UPS must be in the Off position.
3.2 Suggested Cable Sizes
3.3 External Protection and Isolating Devices
An external 70A disconnect switch must be installed upstream of the UPS to protect power cabling
and provide a means of isolating the UPS from utility.
!
WARNING
Installation may be carried out only by qualified technicians and in conformity with the
applicable safety standards.
!
WARNING
Electric shock hazard: Even when the unit is disconnected from the utility, hazardous voltage
may still be supplied by the battery. Both poles must be disconnected before any work is
performed inside the UPS.
!
WARNING
If the Maintenance Bypass Breaker is in the Bypass position, output power is available
immediately upon application of AC input.
Table 2 Connection data *
Description
Units Liebert
®
GXT3-10000T220
™
Connector size AWG (mm
2
)6 (10)
Max input current Arms 56*
Input cable size (
∅ and neutral) AWG (mm
2
)6 (10)
Max output current Arms 56*
Output cable size (
∅ and neutral) AWG (mm
2
)6 (10)
Ground (Earth) Cable Size AWG (mm
2
)6 (10)
Terminal Torque lb-in (Ncm) 10 (113)
* Cable must be 90°C copper wire
NOTE
To reduce electromagnetic interference:
• Enclose input and output cables to the UPS in separate metal conduits.
• Use shielded communication cables and route separately from power cables
!
WARNING
The following label must be displayed on all switching devices installed in the same electrical
system as the UPS, even when these are located at a distance from the area.
ENSURE THAT THE UNINTERRUPTIBLE POWER SYSTEM IS ISOLATED BEFORE
WORKING ON THIS CIRCUIT
!
CAUTION
A disconnect switch must be provided by others for AC output circuit. To reduce the risk of
fire, connect only to a circuit provided with branch circuit overcurrent protection for 70A
rating in accordance with the National Electric Code, ANSI/NFPA 70.