18
4.4 Connecting The UPS Power Cables
WARNING!!!
A separate line should be used to supply the UPS AC input. Never use the same line to supply
another electrical devices. Do not use any additional cable to increase the length of the UPS’s
input cable. It is advised to use an MCCB suitable for the input current on the UPS’s input line.
The connection of the electrical panel should be supplied by a grounded outlet.
Other-
wise, the UPS and the load connected to the output will be left ungrounded. The grounding sys-
tem must be controlled, and must be strengthen if required. Potential difference between
ground and neutral must be less than 3V AC.
Descriptions of the UPS input output cable connection terminals are shown in figure 4-2 a and b.
Plugs connected to the UPS must be different from regular plugs. Advised input line cable and fuse types are
given in the table below.
WARNING!!!
This series of UPSs are A class. These devices can interfere with other equipment. In these
cases the use must take additional precautions.
UPS
Power
(kVA)
NOMINAL CURRENT : Amperes / Recommended cable cross-section (mm
2
)
Input line
Full capacity recharge
Bypass/output
At full load
Battery
At min. battery voltage
380V
400V
415V
220V
230V
A / mm
2
A / mm
2
A / mm
2
A / mm
2
A / mm
2
A / mm
2
6
11 / 6
10 / 6
10 / 6
19 / 6
18,5 / 6
15 / 6
10
19A / 6
18A / 6
17A / 6
45A / 25
43A / 25
25A / 6
15
25A / 10
24A / 10
23A / 10
48,5A / 16
46,5A / 16
41A / 16
20
33A / 10
31A / 10
30A / 10
64A / 16
62A / 16
55A / 16
30
50A / 16
48A / 16
46A / 16
95A / 25
93A / 25
82A / 25
NOTES:
The neutral conductor should be sized for 1,5 times the output/bypass phase current. The Earth
conductor should be sized at 2 times the output/bypass conductor (this is dependent on the
fault rating, cable lengths, type of protection etc.) These recommendations are for guideline
purposes only and are superceded by local regulations and codes of practice.
4.4.1 Safety Earth
The safety earth cable must be connected to the earth BUS BAR and bonded to each cabinets in the system
and also the earthing and neutral bonding arrangements must be in accordance with the local laws.
ATTENTION!!!
Failure to follow adequate earthing procedures can result in electric shock hazard to person-
nel, or the risk of fire.
