Vertiv Tech EXS 0080kTK16FN01000, User Manual

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Vertiv | Liebert EXS 80kVA UPS | User Manual 2
Overview
1.2. Design Concept
1.2.1. System Design
This section introduces the working principle of the UPS single module. The UPS adopts AC-DC-AC converter
(as shown in Figure 1-1 ).
• The first stage conversion (AC-DC) adopts a three-phase high frequency rectifier to convert the three-phase
input voltage into stable DC bus voltage.
• The second stage conversion (DC-AC) adopts a three-phase high frequency rectifier to convert the DC power
supply into the three-phase AC input voltage.
Figure 1-1 Block Diagram for Working Principle of UPS Single Module
The working principle of single module UPS is as follows:
1. The UPS is composed of mains input (main and bypass), rectifier/PFC, charger, inverter, bypass, battery, and
output.
2. When the mains is normal, the rectifier and inverter work together to supply the loads and charge the battery.
Input
Maintenance bypass switch
Bypass input switch
Mains input
Rectifier input switch
Bypass input
Battery charger
UPS
output Output switch
Inverter switch Inverter
Rectifier
Battery
Output
Maintenance bypass
Bypass automatic switch