10
◆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.
3.6 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 .
CAUTION !
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C
(normal) for 125% of the current as listed below.
3.7
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 ANY 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：
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