APC MGETM GALAXYTM 6000 User Manual download pdf (Page 9)

6739381EN/

Installation comprising modular UPSs with an external maintenance bypass

Fig. 3

The table opposite serves as an

example for an installation with up to

four modular UPSs with an external

maintenance bypass.

◗ 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

units are used to determine the

currents on the maintenance bypass

line and the load, and the cross-

sectional areas of cables);

◗ this table has been drawn up for

rated phase-to-phase Mains 2 and load

voltages of 415V and full rated load

with a power factor of 0.8. For voltages

of 380 or 400V, 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 example, figure 3);

◗ important. In an installation with an

external maintenance bypass, the

power cables between each UPS and

the upstream protection devices

must be the same length. The same

holds for the power cables between

each UPS cubicle and the external

maintenance bypass.

Parameters for connection of the external maintenance bypass circuit and the

load in an installation comprising modular UPSs

rated inverter number of total UPS Mains 2 or load cable cross-section

output parallel-connected rated output line current (1) in mm

in kVA inverters in kVA in Amps Copper Aluminium

250 2 500 722 2 x 185 2 x 300

3 750 1082 3 x 300 4 x 240

4 1000 1444 4 x 240 4 x 400

300 2 600 866 2 x 240 4 x 185

3 900 1299 4 x 240 4 x 400

4 1200 1732 Please consult us*

400 2 800 1154 4 x 185 4 x 300

3 1200 1731 Please consult us*

4 1600 2308 Please consult us*

450 2 900 1299 4 X 240 4 x 400

3 1350 1948 Please consult us*

500 2 1000 1444 4 X 240 4 x 400

3 1500 2166 Please consult us*

(1) cable cross-sections are given for copper

conductors of the U1000 R02V type. 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%.

maintenance Bypass cubicle

mains 1

inverter 1

inverter 2

inverter 3

load

mains 2

mains 1

mains 2

mains 1

mains 2

Characteristics (cont.)

NF C 15-100 authorizes a maximum of 4

cables per phase.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 45 46

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APC MGETM GALAXYTM 6000 User Manual Page 9

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