UNDERSTANDING UPS OPERATION
Power Xpert
9395 UPS (450–550 kVA) Installation and Operation Manual
164201701 Rev 3
www.eaton.com/powerquality
6-8
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.
6.3
UPS System Oneline Configurations
The system oneline drawings in this section show the simplified internal structure of
the UPS, battery supply, and basic maintenance bypass.
Oneline Drawing
UPS Model
Voltage
System Type
Input
Output
Figure 6‐6 on page 6-9
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Common
Rectifier Feed, Common Battery, Dual‐Feed
Configuration
Figure 6‐7 on page 6-10
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Common
Rectifier Feed, Separate Battery, Dual‐Feed
Configuration
Figure 6‐8 on page 6-11
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Common
Rectifier Feed, Common Battery, Dual‐Feed
Configuration
Figure 6‐9 on page 6-12
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Common
Rectifier Feed, Separate Battery, Dual‐Feed
Configuration
Figure 6‐10 on page 6-13
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Common
Rectifier Feed, Common Battery, IOM Configuration
Figure 6‐11 on page 6-14
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Common
Rectifier Feed, Separate Battery, IOM Configuration
Figure 6‐12 on page 6-15
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Common
Rectifier Feed, Common Battery, IOM Configuration
Figure 6‐13 on page 6-16
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Common
Rectifier Feed, Separate Battery, IOM Configuration
Figure 6‐14 on page 6-17
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Separate
Rectifier Feed, Separate Battery, Dual‐Feed
Configuration
Figure 6‐15 on page 6-18
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Separate
Rectifier Feed, Separate Battery, Dual‐Feed
Configuration
Figure 6‐16 on page 6-19
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Two UPM, Separate
Rectifier Feed, Separate Battery, IOM Configuration
Figure 6‐17 on page 6-20
9395-550/450
9395-550/500
9395-550/550
480
480
Single Reverse Transfer UPS
– Three UPM, Separate
Rectifier Feed, Separate Battery, IOM Configuration
Figure 6‐18 on page 6-21
9395-550/450
9395-550/500
9395-550/550
480
480
Simplified Dual-Feed UPS with Maintenance Bypass
Panel
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