APC galaxy 9000 User Manual

34006451EN/AC

 - Page 8

Characteristics 

The table below serves as an example for an installation comprising up to four frequency converters or four parallel UPSs 
with a centralised SSC.

– for installations with redundant units, take into account only the units required to supply the load power 

(e.g. for an installation made up of 3 parallel-connected rectifier-inverter cubicles, one being redundant,  only 2 rectifier-
inverter cubicles are used to determine Mains 2 and load currents and cable cross-sections);

– this table has been drawn up for rated phase-to-phase Mains 2 and load voltages of 415 V and full rated load with a power 

factor of 0.9. For voltages of 380 or 400 V, multiply the indicated currents by 1.09 and 1.04 respectively, then modify the cable 
cross-sections accordingly if necessary. 

The cable cross-sections in this table are for the parts illustrated in bold on the following block diagrams (installation examples, 

figures 1 and 2).

800

2

1600

2310

Please consult us*

3

2400

3465

Please consult us*

4

3200

4620

Please consult us*

900

2

1800

2598

Please consult us*

3

2700

3897

Please consult us*

4

3600

5196

Please consult us*

1) cable cross-sections are given for copper conductors of the U1000 R02V type (increase by 30 % for aluminium conductors). 

They are calculated according to permissible temperature rise and allow for line voltage drops over a maximum length of 100 m.  

For greater lengths, the cross-sections should be chosen to limit voltage drops to 3 %.

mains 1

load

mains 1

mains 1

inverter 1

inverter 2

inverter 3

mains 1

load

mains 1

mains 1

inverter 1

inverter 2

inverter 3

mains 2

static

switch

cubicle