8
◆
The highest altitude that UPS may work normally with full load is 1500 meters. The load
capacity should be reduced when this UPS is installed in place whose altitude is higher than 1500
meters, shown as the following table:
(Load coefficient equals max load in high altitude place divided by nominal power of the UPS)
Altitude(m) 1500 2000 2500 3000 3500 4000 4500 5000
Load
coefficient
100% 95% 90% 85% 80% 75% 70% 65%
◆
The UPS cooling is depending on fan, so it should be kept in good air ventilation area.
There are many ventilation holes on the front and rear, so they should not be blocked by any exotic
obstacles.
3.5 External Protective Devices
For safety reasons, it is necessary to install, external circuit breaker at the input A.C. supply and
the battery. This chapter provides guidelines for qualified installers that must have the knowledge of
local wiring practices for the equipment to be installed.
◆
External Battery
The UPS and its associated batteries are protected against the effect of over-current
through a DC compatible thermo-magnetic circuit-breaker (or a set of fuses) located close to
the battery.
◆
UPS Output
Any external distribution board used for load distribution shall be fitted with protective
devices that may avoid the risk of UPS overloaded.
◆
Over-current
Protection device shall be installed at the distribution panel of the incoming main supply. It
may identify the power cables current capacity as well as the overload capacity of the system.
3.6 Power Cables
◆
The cable design shall comply with the voltages and currents provided in this section, Kindly
follow local wiring practices and take into consideration the environmental conditions (temperature
and physical support media)
.
WARNING!
Upon starting. Please ensure that you are aware of the location and
operation of the external isolators which are connected to the UPS
input/bypass supply of the mains distribution panel. Check to see if
these supplies are electrically isolated. And post and necessary
warning signs to prevent any inadvertent operation.
◆
For future expansion purpose, it is economical to install power cable according to the full rating
capacity initially. The diameter of cable is shown bellow
：
UPS
cabinet
Cable Dimension
AC Input
(mm
2
)
AC Output
(mm
2
)
DC Input
(mm
2
)
Grounding
(mm
2
)
10kVA
10
10
10
10
15kVA
16
16
16
16
20kVA
25
25
35
25
