Connecting Parallel Cables - Liebert ITA 6kVA User Manual

Using the parallel POD power distribution
In UPS parallel system, it is recommended to use POD provided by Emerson to perform power distribution. Refer to
Liebert ITA 5kVA And 6kVA UPS Power Output Distribution Unit User Manual for the cable connection.
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Power distribution by the user
The block diagram of four-UPS parallel system is shown in Figure 3-2. Refer to 2.3.1 Connecting I/O Cables for the
cable connection of each UPS. When using the power distribution by the user, refer to Table 2-2 and Table 2-3 for
MCBs and cables.

3.2.2 Connecting Parallel Cables

The parallel system provides parallel cables. The parallel cables form a ring connection through the parallel ports on
the UPS rear panel. The cable connection schematic diagram of 3 + 1 parallel system is shown in Figure 3-3. The
parallel port of the UPS is DB15 male port (needle shape), and the parallel cable port is DB15 female port (hole
shape).
UPS1
UPS2
UPS3
UPS4
User input power
distribution unit
Input cable
Figure 3-2 Block diagram of four-UPS parallel system
Figure 3-3 Cable connection schematic diagram of 3 + 1 parallel system
Liebert ITA 6kVA UPS User Manual
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Chapter 3 Parallel UPS Installation And Commissioning
User output power
distribution unit
UPS1
UPS2
UPS3
UPS4
Paralleled address
Control port
Paralleled address
Control port
Paralleled address
Control port
Paralleled address
Control port
Output cable
+
-
Input switch Battery port
230/400Vac-40A 192Vdc 27A
PE
+
-
Input switch Battery port
230/400Vac-40A 192Vdc 27A
PE
+
-
Input switch Battery port
230/400Vac-40A 192Vdc 27A
PE
+
-
Input switch Battery port
230/400Vac-40A 192Vdc 27A
PE
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