Vertiv Liebert APS series, Installer And User Manual

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Figure 2.11 External battery cabinet
2.4 Operating Principle
The operating principle of the Liebert APS UPS is shown in Figure 2.12 below.
The UPS is composed of AC input, EMI filter, power module(s), battery module(s), user interface, control
interface, system control module, output and bypass contactor, manual bypass, output transformer
(certain frames only) and AC output.
Figure 2.12 Operating principle diagram
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