IV420E Rev.00 SIEL S.p.A.
Installation and user manual
Date of issue: 2019-01-29
Pag. 20 di 72+ FR
commissioning engineer.
3.9
UPS parallel Installation
The following sections introduce the installation procedures specified to the parallel system.
3.9.1 Cabinet installation
Connect all the UPS 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, A (L1), B (L2), C (L3) lines are correct, and
grounding 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 units as shown below. The ring configuration ensures high
reliability of the control.
Summary of Contents for 50-200kVA PF-1 UPS
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