6
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.
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C
(normal) for 125% of the current as listed below.
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).
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.
Cable Dimension
UPS module
Cable Dimension
AC Input
(mm
2
)
AC Output
(mm
2
)
DC Input
(mm
2
)
Grounding
(mm
2
)
6 6 6 6
10KVA
10 10 10 10
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