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3.0
M
C
AJOR
OMPONENTS
The Liebert GXT2-PP20KRT208 has five main components (see Figure 4):
• UPS input / output circuit breakers
• Main input / output terminal blocks
• Parallel communication ports
• Maintenance bypass breaker
• Input and output slots for each UPS
Figure 4
Liebert GXT2-PP20KRT208 components
UPS Input / Output
Circuit Breakers
3.1
Input and Output Slots for UPS
The parallel POD is shipped with three input/output slots for hardwire connections with the UPSs.
The eight-pole connector with color coding and keying are used for the interconnecting wires between
UPS input and output. The UPS connector will snap into the connector of the parallel POD only in the
correct direction and only with the same color.
3.2
Main Input / Output Terminal Blocks
Hardwire terminal blocks are at the top left corner on the front side of the parallel POD. Input and
output wiring should not share the same conduit. See the requirements and label in 5.3 - Main Input
and Output Terminal Block Connections to connect the wires.
3.3
Maintenance Bypass Breaker
The Maintenance Bypass Breaker allows the user to transfer the load to utility to remove a UPS from
the paralleling system for maintenance without shutting off power to the load (see 8.1.2 - Bypass
Mode) for the transfer procedure). For further information on the UPS Maintenance Bypass Breaker,
refer to the Liebert GXT2-10000RT208 user manual, SL-23444, available at the Liebert Web site,
www.liebert.com
3.4
UPS Input / Output Circuit Breakers
The Liebert GXT2-PP20KRT208 is equipped with six circuit breakers (three input breakers and three
output breakers). During normal operation in the paralleling system, input/output circuit breakers
are in the On position. When installing or removing a UPS, the corresponding breakers should be
switched to the Off position.
Main Input / Output
Terminal Blocks
Input and Output Slots for UPS
7
Major Components
Parallel
Communication
Ports
Maintenance
Bypass
Breaker
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