Operation manual
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26
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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
Table 5-1:
(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 COEFICIENT
100%
95 %
90 %
85 %
80 %
75 %
70 %
65 %
Table 5-1 Load coefficient
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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.
Electrical installation
5.3.1
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.
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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.
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UPS Output
Any external distribution board used for load distribution shall be fitted with protective devices that may
avoid the risk of UPS overloaded.
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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.
Connection of 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. Post necessary warning signs to prevent any inadvertent operation.
