3.9 UPS Multi᧩Module Installation
The basic installation procedure of a parallel system comprising of two or more UPS
modules is the same as that of single module system. The following sections introduce the
installation procedures specified to the parallel system.
3.9.1 Cabinet installation
Connect all the UPSes needed to be put into parallel system as below picture.
Make sure each UPS input breaker is in “off” position and there is no any output
from each UPS connected. Battery groups can be connected separately or in parallel,
which means the system itself provides both separate battery and comman battery.
WARNING!
Make sure the NᇬL lines are correct, and grouding is well
connected.
3.9.2 Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring
configuration between UPS modules as shown below. The parallel control board is
mounted on each UPS module. The ring configuration ensures high reliability of the control.
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