Figure 6-4. Path Of Current Through The Ups In Battery Mode - Eaton Power Xpert 9395P-900 Series Installation And Operation Manual

If at any time during the battery discharge the input power becomes available again, contactors K1 and K5 close
and the rectifier begins to supply DC current to the converter and inverter. At this point, the unit returns to
Normal mode. Depending on the total load and the duration of the battery discharge, battery current limit alarms
may be seen for a short time due to the current required to recharge the battery.
Bypass Input
Input
Breaker
(CB1
Rectifier
Input
K1
Breakers Contactors
NOTE On a UPS configured as an IOM, the bypass input, static switch, bypass breaker (CB4), and K5 are not present.
NOTE On a UPS configured with a Continuous Static Switch (CSS), bypass breaker (CB4) is not present.

Figure 6-4. Path of Current Through the UPS in Battery Mode

®
Eaton
R c e f i t r e i
Closed
Open
®
Power Xpert 9395P-900 UPS Installation and Operation Manual P-164000501—Rev 09
Static
K5
Switch
Battery
Converter
K2
Battery
Breaker
Battery
Understanding UPS Operation
I v n r e r e t
K3
Main Power Flow
Trickle Current
Energized
De-Energized
www.eaton.com/powerquality
Output
6-7