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52 Chapter 7 Parallel System And Dual Bus System
APM 300 Integrated UPS Single Module And Parallel System User Manual
Chapter 7 Parallel System And Dual Bus System
This chapter details the installation and wiring of the parallel system and dual bus system.
7.1 Overview
Two UPSs can be connected in parallel to form a 1 + 1 parallel system (parallel system for short).
7.2 System Installation Procedures
The basic installation procedure of a parallel system comprising two or more UPS modules is the same as that
of single module system. This section only introduces the installation procedures specific to the parallel
system. The installation of a parallel UPS should follow the installation procedure for a single UPS module with
the additional requirements detailed in this section.
7.2.1 Preliminary Checks
Be sure that the options of the parallel cables are correct, and that the modules are of the same rating, model,
and with the same software and hardware release.
Warning
To achieve coordinated operation of the modules in the parallel system, it is required to configure each module
separately using Emerson setting software. This must be done by Emerson service personnel.
7.2.2 Cabinet Installation
Position the UPS modules and make connection as shown in Figure 7-1. The output distribution mode (where
Q1EXT and Q2EXT must be fitted) shown in Figure 7-1 is recommended to facilitate maintenance and system
testing.