POLARIS 10●15●20●30●40●60●80●100●120●160
TRIPHASE-TRIPHASE
Rev. 04 – 06 December 2016
7
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.
CAUTION!
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C (normal) for 125% of
the current as listed below.
3.6 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 below:
UPS
CABLE DIMENSION (mm
2
)
AC
Input
AC
Output
DC
Input
Ground
10KVA
4 x 10
4 x 10
10
10
15KVA
4 x 10
4 x 10
16
10
20KVA
4 x 16
4 x 16
20
16
30KVA
4 x 16
4 x 16
3 x 35
16
40KVA
4 x 16
4 x 16
3 x 16
16
60KVA
4 x 35
4 x 35
3 x 50
35
80KVA
4 x 35
4 x 35
3 x 35
35
100KVA
4 x 50
4 x 50
3 x 70
50
120KVA
4 x 50
4 x 50
3 x 50
50
160KVA
4 x 70
4 x 70
3 x 70
50
