Installation manual

Prerequisites > Power cables for parallel UPSs
34020846EN/AE - Page 22
1. Installation
Frequency converters
1
Do not include redundant UPS units.
Modular UPSs in parallel with external bypass cabinet
Important: For > 200 kVA UPSs, the output cables must be at least 6 metres long (L ≥ 6 m).
UPS
cabinets in
kVA
Nbr of
UPSs
Total power
rating
1
in kVA
Load current in
A
Minimum size for
load in mm²
160 2 160 231 1x95
200 2 200 289 1x120
250 2 250
361 1x150
300 2 300
433 1x240
400 2 400
577 2x150
500 2 500
722 2x240
AC cable sizes are determined for:
the TNS system for copper, single-core cables, type U1000 R02V, 100 m long with a line voltage drop <3%, installed on
perforated cable trays, XLPE-type insulation, single-layer trefoil formation, THDI between 15% and 33%, 35°C, at 400V,
grouped in four touching cables.
Battery cable sizes are determined for:
copper, single-core cables, type U1000 R02V, maximum length 25 m with a line voltage drop <1%.
UPS
cabinet
in kVA
Nbr
of
UPSs
Total power
rating
1
in
kVA
Current on
AC bypass or
load in A
Min. size for AC
bypass or load in
mm²
160 2
3
4
320
480
640
462
693
923
2x95
2x185
2x240
200 2
3
4
400
600
800
578
866
1154
2x150
2x240
4x185
250 2
3
4
500
750
1000
722
1083
1443
2x185
3x300
4x240
300 2
3
4
600
900
1200
866
1300
1732
2x240
4x240
4x300
400 2
3
4
800
1200
1600
1154
1732
2308
4X185
4x300
4X500
500 2
3
4
1000
1500
2000
1433
2165
2886
4x240
4X500
Consult us
2
1
Do not include redundant UPS units.
2
Standard NFC15-100 limits the number of cables to four.
Power cables between the UPS units and the upstream protective devices must all be of the same size and length.
Power cables between the UPS units and the load must all be of the same size and length.
Normal AC
Normal AC
L
L
UPS 1
UPS 2
Load
Normal AC
Normal AC
Normal AC
Bypass AC
L
L
L
Load
UPS 1
UPS 2
UPS 3
Bypass cabinet