Paralleled Ups Modules; Cabinet Installation; Figure 15 Typical 1+N System Block Diagram With Common Input Supply, With Separate Batteries; And Optional Output / Bypass Distribution Panel - Emerson Liebert NX User Manual

UPS Multi-Module Installation
3.2

Paralleled UPS Modules

The basic installation procedure of a parallel system comprising two or more UPS modules is the
same as that of single module system. The following sections only introduce the installation proce-
dures specific to the parallel system.
3.2.1

Cabinet Installation

Place the UPS modules side by side and interconnect as shown in Figure 15. The distribution panel
(external bypass cabinet) is optional but recommended for ease of maintenance and system testing.
Figure 15 Typical 1+N system block diagram with common input supply, with separate batteries and
optional output / bypass distribution panel
SUPPLIED BY OTHERS
SUPPLY L1, L2, L3, N
FUSES
CHARGER
BATTERY 1
INPUT MAINS
CB1
UPS1
RECTIFER
SW1-C
STATIC
SWITCH
INVERTER
SW1-A
L, N
Q1EXT
QUPS
Distribution Cabinet
TO LOAD
INPUT MAINS
SUPPLY L1, L2, L3, N
CB1
UPS2
FUSES
STATIC
SWITCH
CHARGER
BATTERY 2
SW1-A
L, N
Q2EXT
26
RECTIFER
SW1-C
INVERTER
SW1-D
QBYP