Figure 6-12. Path Of Current Through The Upss In Battery Mode – Distributed Bypass - Eaton Powerware 9395 UPS 10001100 kVA Installation And Operation Manual

UNDERSTANDING UPS OPERATION
Bypass Input
Battery
Battery
Battery
Battery
6−16
EATON Powerware
UPS Input
Breakers
Main Power Flow
Figure 6-12. Path of Current through the UPSs in Battery Mode – Distributed Bypass
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 Normal 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.
®
9395 UPS (1000–1100 kVA) Installation and Operation Manual
UPS 1
UPS 2
UPS 3
UPS 4
Closed
Open
S
164201764 Rev 1 www.powerware.com
Tie Cabinet
UPS 1 Output
UPS 2 Output
UPS 3 Output
UPS 4 Output
Output to
Critical Load