3.4.2 Current sharing
When two or more Power+ units are operated in parallel, it is required that their current-sharing terminals be
connected together: yellow to yellow, orange to orange, red to red, and blue to blue. Connecting two or
more Power+ units via their current-sharing terminals causes current-sharing to be take place between all
the modules of both systems together.
When three or more Power+ units are operated in parallel, their current-sharing terminals must be
connected together in series; for example:
Connect the current-sharing terminals on UPS "x" to those on UPS "y", and connect the current-sharing
terminals on UPS "y" to those on UPS "z".
When connecting current-sharing terminals, it is irrelevant which UPS is the "master" UPS and which are
the "slaves".
Figure 13: Current sharing connections for 3 UPSs
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