Eaton 93PS - Page 13

2.2.2.2 UPS system power wiring preparations
Table 3. Minimum recommended multi-core cable and fuse sizes for rectifier and bypass input and
UPS output cables
UPS rating (kW) 8 10 15 20 30 40
Cable [mm2] *
4*2.5 4*4 4*10 4*10 4*16 4*25
Rectifier fuse [A]
20 20 32 40 63 80
Bypass fuse [A]
20 20 32 40 63 80
PE cable [mm2]
1*6 1*6 1*10 1*10 1*16 1*16
Maximum conductor cross
section
20 kW frame and 20 kW C-model: solid wire 16 mm
2
, stranded wire
with ferrule: 10 mm
2
40kW frame: solid wire 70 mm
2
, stranded wire with ferrule: 50 mm
2
* Minimum recommended
CAUTION
Make sure that prospective short-circuit current resulting at the UPS input terminals is
equal or less than conditional short-circuit current declared on the type plate of the UPS.
Table 4. Minimum recommended cable and fuse sizes for external battery bank
UPS rating (kW) 8 10 15 20 30 40
Pos. & neg. line [mm
2
] *
1*16 1*16 1*16 1*16 1*35 1*35
Battery fuse [A]
63 63 63 63 160 160
PE cable [mm
2
]
1*16 1*16 1*16 1*16 1*16 1*16
Maximum conductor cross
section
20 kW frame, 20 kW C-model and 40 kW frame with separate
battery: solid wire: 25 mm
2
, stranded wire with ferrule: 16 mm
2
40 kW frame with common battery: solid wire: 90 mm
2
, stranded
wire with ferrule: 70 mm
2
* Minimum recommended
For information on rated and maximum currents for rated power and voltage, refer to the
Eaton 93PS UPS 8-40 kW User’s and Installation Guide.
For the external separate battery option, there are separate terminals for both battery
banks (cabinets). These terminals replace terminals 13 and 14, see illustration 6.2.
NOTE: External overcurrent protection is not provided by this product, but is required by
codes. Refer to Table 3 for wiring requirements. If a lockable output disconnect is required,
it must be supplied by the user.
EN
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