General System Information

Figure 6 Integrating a single Liebert FS unit into a UPS system

UPS Block Diagram

Bypass

Breaker

Bypass

GRID

UPS

Feeder

Input

Breaker

Breaker

Utility

Static

Switch

UPS

Rectifier

UPS

DC

Bus

UPS

Output

Breaker

CRITICAL

AC LOADS

EMERSON

Liebert

Network Power

 

Liebert FS

 

Several Liebert FS units can be put in parallel to achieve higher power output and higher ride- through duration (see Figure 7). One or more Liebert FS units may also be connected in parallel with a UPS battery plant (valve- regulated or wet cells) to provide an overall incremental reliability and life improvement for the DC battery plant. In this situation, the Liebert FS unit would be connected in parallel with the battery plant (through its own disconnect device) to the UPS DC Bus.

Figure 7 Integrating multiple Liebert FS units into a UPS system

 

Bypass Breaker

UPS Block Diagram

Bypass

Static

 

 

Switch

 

GRID

 

UPS

 

UPS

Feeder

 

Output

 

Input

UPS

 

Breaker

Breaker

Breaker

 

DC Bus

Utility

 

UPS

UPS

 

 

 

 

Rectifier

 

Inverter

 

 

EMERSONNetwork Power

EMERSONNetwork Power

EMERSONNetwork Power

 

 

Liebert

Liebert

Liebert

Liebert FS

Liebert FS

Liebert FS

Unit #1

Unit #2

Unit #N

CRITICAL

AC LOADS

9

DISCONTINUED

 

PRODUCT

Page 21
Image 21
Emerson 540VDC manual Bypass, Utility Static Switch, Rectifier