12
◆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：
UPS
cabinet
AC Input
(mm
2
)
AC Output
(mm
2
)
DC Input
(mm
2
)
Grounding
(mm
2
)
CAUTION!
Protective earth cable: Connect each cabinet to the main ground system. For
Grounding connection, follow the shortest route possible。
WARNING!
FAILURE TO FOLLOW ADEQUATE EARTHING PROCEDURES MAY
RESULT IN ELECTROMAGNETIC INTERFERENCE OR IN HAZARDS
INVOLVING ELECTRIC SHOCK AND FIRE
3.8 Power cable connect
Once the equipment has been finally positioned and secured, connect the power cables as
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