Block diagram for working principle of four switches UPS
N o.
D es crip tion
N o.
D es crip tion
1
Input
9
Rectifier input switch
2
Output
10
Rectifier
3
Bypass input
11
Inverter
4
Maintenance bypass switch
12
Automatic inverter switch
5
Bypass input switch
13
Output switch
6
Static switch
14
UPS output
7
Maintenance bypass
15
Battery
8
Mains input
16
Battery charger
The UPS has its own battery charger and adopts advanced temperature compensation technology to effectively prolong
the battery service life. The inverter adopts three level T-type IGBT topology and uses advanced SVPWM control
technology to derive the stable AC voltage from the DC bus voltage.
When the mains is normal, the rectifier and inverter work together to supply the loads and charge the battery.
When the mains is abnormal, the rectifier stops working, and the battery supplies power to the loads through the inverter. If
the battery voltage falls to end of discharge (EOD) voltage and the mains still has not been recovered, the UPS will shut
down (if the system uses split bypass configuration and the bypass is normal, the system will transfer to bypass). The
battery EOD voltage is preset. When the mains is abnormal, the battery maintains the UPS operation till the battery voltage
is reduced to EOD voltage and the UPS shuts down, this time is called 'Backup Time'. The length of backup time depends
on the battery capacity and the loads.
2 Overview
12
Vertiv™ Liebert® APM Plus User Manual
Summary of Contents for APM Plus 0500kMK16FN02000
Page 1: ...Vertiv Liebert APM Plus User Manual 50 500 kVA UPS...
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Page 34: ...2 Overview 26 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 45: ...Four switches 500 kVA 3 Mechanical Installation 37 Vertiv Liebert APM Plus User Manual...
Page 76: ...Figure 5 11 Customize the display 5 Touch Screen 68 Vertiv Liebert APM Plus User Manual...
Page 86: ...Figure 5 20 Enable module redundancy 5 Touch Screen 78 Vertiv Liebert APM Plus User Manual...
Page 91: ...Figure 5 24 Status Gauge setting options 5 Touch Screen 83 Vertiv Liebert APM Plus User Manual...
Page 92: ...5 Touch Screen 84 Vertiv Liebert APM Plus User Manual...
Page 94: ...5 Touch Screen 86 Vertiv Liebert APM Plus User Manual...
Page 95: ...Figure 5 26 Unit status Bypass details 5 Touch Screen 87 Vertiv Liebert APM Plus User Manual...
Page 96: ...Figure 5 27 Unit status Battery details 5 Touch Screen 88 Vertiv Liebert APM Plus User Manual...
Page 97: ...Figure 5 28 Unit status Load details 5 Touch Screen 89 Vertiv Liebert APM Plus User Manual...
Page 100: ...5 Touch Screen 92 Vertiv Liebert APM Plus User Manual...
Page 112: ...5 Touch Screen 104 This page intentionally left blank Vertiv Liebert APM Plus User Manual...
Page 184: ...12 Specifications 176 This page intentionally left blank Vertiv Liebert APM Plus User Manual...