10
WARNING!
Ensure correct polarity of string end connections to the Battery
Circuit Breaker and from the Battery Circuit Breaker to the UPS
terminals i.e. (+) to (+) / (-) to (-) but disconnect one or more battery
cell links in each tier. Do not reconnect these links and do not close
the battery circuit breaker unless authorized by the commissioning
engineer.
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 common battery.
WARNING!
Make sure the N and L lines are correct, and grounding is
well connected.
