Figure 2.4 UPS Operating Principle
Item Description
1 Bypass input
2 Maintenance bypass breaker (MBB)
3 Bypass input breaker (BIB)
4 Static switch
5 Rectifier input
6 Rectifier input breaker (RIB)
7 Rectifier
8 Battery charger
9 Battery
10 Inverter
11 Automatic inverter switch
12 Maintenance isolation breaker (MIB)
13 UPSoutput
2.6 UPS States and Operating Modes
NOTE: See Table 4.2 on page32, for description of the run indicator and alarm indicator LEDs mentioned in this
section.
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Vertiv™ Liebert® EXS Installer/User Guide