Installation - MGE UPS Systems Galaxy PW 30 kVA Installation Manual

Characteristics (cont.)
The table opposite serves as an
example for a parallel-connected
installation comprising up to four UPS
units.
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 UPS units, one being
redundant, only 2 UPS units are used
to determine bypass AC source and
load currents and cable cross-
sections);
this table has been drawn up for
rated phase-to-phase bypass AC
source and load voltages of 400 V and
full rated load with a power factor of
0.8. For voltages of 380 V or 415 V,
multiply the indicated currents by 1.05
and 0.96 respectively, then modify the
cable cross-sections accordingly, if
necessary.
The cable cross-sections in this table
concern the parts illustrated in bold in
the simplified diagram in figure 3,
where:
1: normal AC source,
2: bypass AC source,
A: external bypass.
8 -
E-51028231XU/BH
Parameters for bypass AC source and load cables for a parallel UPS
configuration
Rated unit Number of
output parallel-
in kVA connected
units
20 2
3
4
30 2
3
4
40 2
3
4
50 2
3
4
60 2
3
4
80 2
3
4
100 2
3
4
120 2
3
4
160 2
3
4
200 2
3
4
(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
2
Fig. 3
Total UPS Bypass AC
rated output source or load
in kVA line current
in Amps
40 58
60 87
80 116
60 86
90 129
120 172
80 116
120 174
160 232
100 144
150 216
200 288
120 174
180 261
240 348
160 232
240 348
320 464
200 288
300 432
400 576
240 348
360 522
480 696
320 462
480 693
640 924
400 578
600 866
800 1155
maximum length of 100 m. For greater lengths, the
cross-sections should be chosen to limit voltage
drops to 3%.
A
1
Galaxy 1
2
1
Galaxy 2
2
1
Galaxy 3
2
Cable cross-
section (1)
in mm 2
35
50
50
50
70
70
50
70
120
70
95
150
70
120
185
120
185
2x95
150
185
2x120
185
2x120
2x150
2x95
2x150
3x120
2x120
2x185
3x185