Connecting Cables; Connecting I/O Cables - Liebert UHA1R-0100 User Manual

3.4 Connecting Cables

Each single UPS of the parallel system needs to configure the MCB and cables respectively, refer to Table 2-3 and
Table 2-4 for the specifications of the MCB and cables.

3.4.1 Connecting I/O Cables

There are two modes for UPS parallel power distribution: using the POD (optional) provided by Emerson and
self-distribution.
According to the user requirements, the I/O cable connections are divided into two types: 1-input 1-output (default)
and 3-input 1-output.
Using POD power distribution
The UPS parallel system uses the POD provided by Emerson to perform power distribution. Refer to Liebert
10kVA UPS Parallel Power Distribution Unit User Manual delivered with the POD for the power cable connection.
Self-distribution
The block diagram of four-UPS parallel system is shown in Figure 3-2. Refer to 2.5.1 Connecting I/O Cables for the
cable connection of each UPS. When using the self-distribution, refer to Table 2-3 and Table 2-4 to select the MCBs
and the cables.
3-input 1-output
3 + 1 parallel
POD
UPS
Battery module
UPS
Battery module
UPS
Battery module
UPS
Battery module
Figure 3-1 Installation of the 3 + 1 parallel system with battery modules
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Chapter 3 Parallel UPS Installation And Commissioning 29
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