Auxiliary Backup AC Power Supply

Appendix F.3.1 Operating the Liebert FS+DC in Parallel With Batteries

If the Liebert FS is operating in parallel with batteries, Liebert recommends attaching the backup AC power supply to the output of the UPS, as shown in Figures 156 and 157.

Figure 156 A single Liebert FS+DC unit operating with a UPS in conjunction with batteries

UPS

Grid supply

DC bus

UPS AC

Output

BACKUP AC POWER SUPPLY

Battery

Liebert FS

pack

 

Figure 157 Multiple Liebert FS+DC units operating with a UPS in conjunction with batteries

 

 

UPS

Grid

 

 

 

 

UPS AC

supply

 

 

 

Output

Distribution BACKUP AC POWER SUPPLY panel*

DC bus

Battery

 

pack

 

* NOTE:

3 Liebert FS units

Distribution panel allows

 

removal of a Liebert FS with-

 

out disrupting the other units

 

151

DISCONTINUED

 

PRODUCT

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Image 163
Emerson 540VDC manual Grid supply DC bus, Battery Liebert FS Pack