Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 129

Understanding UPS Operation
If at any time during the battery discharge the input power becomes available again, the rectifier begins to
supply DC current to the inverter. At this point, the UPS returns to Online mode. If at any time during the
battery discharge the AC input power becomes available again, each rectifier turns on, assumes the inverter
load from the batteries, and begins recharging the batteries. Depending on the total load and the duration of the
battery discharge, battery and rectifier input current limit alarms may be seen for a short time due to the current
required to recharge the batteries.
6 6 . . 5 5 M M u u l l t t i i p p l l e e U U P P S S D D i i s s t t r r i i b b u u t t e e d d B B y y p p a a s s s s S S y y s s t t e e m m O O n n e e l l i i n n e e C C o o n n f f i i g g u u r r a a t t i i o o n n s s
The distributed bypass system oneline drawings in this section show the simplified internal structure of the
UPS, battery supply, and basic maintenance bypass in a multiple UPS configuration. These onelines do not
show each UPM in the UPSs, but represent each UPS in the distributed bypass system. The internal structure
of each UPS is shown in
Oneline Drawing
Figure 60
Figure 61
Figure 62
108 Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
Figure 52 through Figure 55.
UPS Model
Input
9395-550/225
400
9395-550/275
480
9395-550/450
9395-550/500
9395-550/550
9395-550/225
400
9395-550/275
480
9395-550/450
9395-550/500
9395-550/550
9395-550/225
400
9395-550/275
480
9395-550/450
9395-550/500
9395-550/550
Voltage
Output
Multiple UPS – Distributed Bypass
400
1+1 and 2+0 Configurations
480
400
480
Multiple UPS – Distributed Bypass
2+1 and 3+0 Configurations
Multiple UPS – Distributed Bypass
400
3+1 and 4+0 Configurations
480
System Type