Vertiv Liebert EXM2 - Design Concept; System Design

2.2 Design Concept
2.2.1 System Design
This section introduces the working principle of the UPS single module. The UPS adopts AC-DC-AC converter (as shown in
Figure 2.1 below). The first stage conversion (AC-DC) adopts three-phase high frequency rectifier to convert the three-phase
input voltage into stable DC bus voltage.
Figure 2.1 Block d iagram for w orking principle of UPS sin g le m odule
N O. Description N O. Description
1 Input 9 Rectifier input switch
2 Output 10 Rectifier
3 Bypass input 11 Inverter
4 Maintenance bypass switch 12 Inverter switch
5 Maintenance bypass 13 Output
6 Static switch 14 UPS Battery
7 Bypass input switch 15 Battery charger
8 Mains input 16 Output switch
2 Overview
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Vertiv™ Liebert® EXM2 UPS User Manual