Chapter 3 Parallel Ups Installation And Commissioning; Mechanical Installation; Connecting Power Cables; Connecting I/O Cables - Liebert ITA 6kVA User Manual

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Chapter 3 Parallel UPS Installation And Commissioning

Chapter 3 Parallel UPS Installation And Commissioning
The UPS parallel system provides the user with N + 1 (1 ” N ” 3) parallel configuration, N stands for the basic parallel
sets, 1 stands for the redundant sets.
The parallel output power distribution unit (POD for short) which can provide safe and reliable power distribution
function is compulsory for UPS parallel system. The UPS parallel system provides the user with 1 + 1 parallel POD
and 3 + 1 parallel POD.
This chapter introduces the mechanical installation, setting parallel address, connecting parallel cables and POD
cables.

3.1 Mechanical Installation

Taking the rack installation of the 3 + 1 parallel system with battery module for example, the mechanical installation of
the parallel system is as follows:
1. The UPS installation method of 3 + 1 parallel UPS is the same as that of the single UPS. Refer to 2.2 Mechanical
Installation for details.
2. As shown in Figure 3-1, the battery module should be installed at the bottom; the UPS should be installed in the
middle, and the 3 + 1 parallel POD should be installed on the top, so as to facilitate the cable connection and
operation.
3. The installation method of 3 + 1 parallel POD is the same as that of the UPS.
3 + 1 parallel POD

3.2 Connecting Power Cables

In UPS parallel system, each single UPS needs to configure the MCBs and cables respectively, refer to Table 2-2 and
Table 2-3 for the specification.

3.2.1 Connecting I/O Cables

There are two modes for UPS parallel power distribution: using the POD (optional) provided by Emerson and power
distribution by the user.
According to the user's requirements, the I/O cable connections are divided into two types: 1-in 1-out (default) and
3-in 1-out.
UPS
Battery module
UPS
Battery module
UPS
Battery module
UPS
Battery module
Figure 3-1 3 + 1 parallel system including battery modules installation
Liebert ITA 6kVA UPS User Manual
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