3.10 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.
3.10.1 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 N、A（L1）、B（L2）、C（L3）lines are correct, and
grouding is well connected.
3.10.2 Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring
configuration between UPS units as shown below. The parallel control board is mounted on
each UPS module units. The ring configuration ensures high reliability of the control.
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