Installation manual

Prerequisites >
34020846EN/AE - Page 21
1. Installation
Power cables for parallel UPSs
Normal AC line and battery
Bypass AC line and load
Modular UPSs in parallel
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%.
Important: For > 200 kVA UPSs, the output cables must be at least 6 metres long (L ≥ 6 m).
UPS cabinets
in kVA
Minimum size in mm²
Normal AC line Battery
160 1x95 1x95
200 1x120 1x120
250
1x150 1x150
300
1x240 1x185
400
2x150 1x240
500
2x240 2x150
UPS
cabinet
s in kVA
Nbr
of
UPS
s
Total power
rating in kVA
Current on AC
bypass or load in
A
Min. size for AC
bypass or 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
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.
Bypass AC
Normal AC
Bypass AC
Normal AC
Bypass AC
Normal AC
L
L
L
UPS 1
UPS 2
UPS 3
Load
Bypass AC
Normal AC
Bypass AC
Normal AC
L
L
UPS 1
UPS 2
Load