Chapter 1 Overview 1
APM 300 Integrated UPS Single Module And Parallel System User Manual
Chapter 1
Overview
This chapter briefly introduces the features, composition, design concept, parallel system, operation mode,
battery management and battery protection of the Liebert APM 300 UPS (UPS for short).
1.1
Features
The UPS is connected between a critical load (e.g. a computer) and mains power to provide high quality power
for the loads. The UPS has the following advantages:
Increase power quality
The UPS protects its output against the input power change through the internal voltage and frequency
controller.
Improve noise rejection
Due to the application of AC-DC-AC conversion mode, the noise in the input power is effectively filtered, and
the load gets clean power supply.
Provide mains failure protection
If the input power fails, the UPS will work in battery mode, and the power supply to the loads will not be
interrupted.
1.2
Composition
The UPS consists of a main power cabinet and a switch cabinet. The cabinets use steel framework structure
enclosed by removable panels, with the top panels and side panels fixed by screws. The UPS structure is shown
in Figure 1-1. The UPS component configuration is provided in Table 1-1.
Main power cabinet
Cover
Power module
Switch cabinet
Cover
Bypass module
Adjustable foot
Figure 1-1
UPS structure
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