Single Module UPS Installation
8
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
UPS
Rating
(kVA)
Nominal current: Amps Busbar stud size
Input Mains Current
1
with Full Battery
Recharge 3ph + N
Output = Bypass
Current at Full Load
1ph + N
Battery at
End of
Discharge
Input/Output/
Bypass Cables
External
Battery
Cables
(Bolts)
Torque
Load (Nm)380V 400V 415V 220V 230V 240V Bolt Hole Dia. (mm)
10 22 22 22 45 43 42 21
M8 8 M8 4.515 28 28 28 68 65 63 31
20 35 35 35 90 87 83 41
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
2.5mm
2
(10kVA), 6mm
2
(15kVA), 10mm
2
(20kVA), as per AS / IEC 60950-1.
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
Minimum Distance
mm (in.)
Rectifier AC Input supply 284 (11-1/5)
Bypass AC Input supply 284 (11-1/5)
UPS Output AC 369 (14-1/2)
Battery Power 369 (14-1/2)
Auxiliary cables: Monitor board (U2) 1104 (43-1/2)
To Next Page
Loading...
Need help?
General