Chapter 3 Parallel UPS Installation And Commissioning 29
Liebert
®
ITA 10kVA UPS User Manual
3-input 1-output
3 + 1 parallel
POD
UPS
UPS
UPS
Battery module
UPS
Battery module
Battery module
Battery module
Figure 3-1 Installation of the 3 + 1 parallel system with battery modules
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
®
ITA
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.
