Power Cables; Table 1 Maximum Steady State Ac And Dc Currents; Table 32 Table; Table 2 Distance From Floor To Connection Point On The Equipment - Emerson Liebert NX User Manual

Single Module UPS Installation
1.6

Power Cables

The cable design must comply with the voltages and currents provided in this section, follow local wir-
ing practices and take into consideration the environmental conditions (temperature and physical
support media).
For cable entry terminal, refer to Figure 23.
WARNING
!
Before starting the UPS, ensure that you are aware of the location and operation of the
external isolators that connect the ups input/bypass supply to the mains distribution panel.
Check that these supplies are electrically isolated and post any necessary warning signs to
prevent their inadvertent operation.
WARNING
!
Failure to follow adequate earthing procedures may result in electromagnetic interference or
in hazards involving electric shock and fire.
Table 1 Maximum steady state AC and DC currents
Input Mains Current
with Full Battery
UPS
Recharge 3ph + N
Rating
(kVA) 380V 400V
10 22 22
15 28 28
20 35 35
1. Input mains current listed for split rectifier and bypass AC input.
2. Protective earth cable: Connect each cabinet to the main ground system must follow the most direct route possible. The earth conductor
shall be sized in accordance with the AC supply fault rating, cable lengths and type of protection. Typical cross sectional areas are
2 2
2.5mm (10kVA), 6mm (15kVA), 10mm
3. Whene sizing battery cables, a maximum volt drop of 4VDC is permissible at the current ratings given in Table 1. The load equipment is
generally connected to a distribution board containing individually protected busbars rather than connected directly to the UPS output.
The output cables from paralleled units to the parallel distribution bus should be of same length so as to optimize the sharing of current.
Do not form coils, so as to minimize the formation of electromagnetic interference.
4. For terminal location, refer to 4.0 - Installation Drawings.
Table 2 Distance from floor to connection point on the equipment
UPS
Rectifier AC Input supply
Bypass AC Input supply
UPS Output AC
Battery Power
Auxiliary cables: Monitor board (U2)
Nominal current: Amps
1
Output = Bypass
Current at Full Load
1ph + N
415V 220V 230V 240V
22 45 43
28 68 65
35 90 87
2
(20kVA), as per AS / IEC 60950-1.
Minimum Distance
284 (11-1/5)
284 (11-1/5)
369 (14-1/2)
369 (14-1/2)
1104 (43-1/2)
Input/Output/
Battery at
Bypass Cables
End of
Discharge Bolt
42 21
63 31 M8
83 41
mm (in.)
8
Busbar stud size
External
Battery
Cables
Hole Dia. (mm) (Bolts)
8 M8
Torque
Load (Nm)
4.5