18
E
XTERNAL
P
ROTECTIVE
D
EVICES
LINE PROTECTION: MAGNETOTHERMAL OR FUSE
Within the UPS there are protection devices for output and internal faults.
You must protect the input line (and the separate bypass line if present) with the appropriate protection devices. These devices
must comply with the regulations of the country where the UPS is installed.
In order to set up the power line, install a magnetothermal switch upstream from the UPS with intervention curve C or D or gR
type fuse. Please follow the indications in the table below:
Automatic external protective devices
UPS Mod.
Mains input
Single-phase input (P+N)
Three-phase input (3P+N)
5 kVA
40A
/
6 kVA
40A
/
8 kVA
63A
63A
10 kVA
63A
63A
SAFETY DEVICES: DIFFERENTIAL
The differential switch located upstream must have the following characteristics:
Differential current adjusted to the sum of UPS + Load; we recommend a suitable margin be kept to prevent unwanted
activation.
Differential type B.
C
ONNECTION CABLES CROSS SECTION DETAILS
To determine the minimum cross section of the input and output cables, see the table below:
Cross section of cables (sqmm)
*
UPS Mod.
INPUT
OUTPUT
N
L1
L2
L3
N
L
5 kVA
6
/
6
6 kVA
6
/
6
8 kVA
10 (16 max)
2.5 (16 max)
10 (16 max)
10 kVA
10 (16 max)
2.5 (16 max)
10 (16 max)
*
The cross sections indicated in the table refer to a maximum length of 10 meters.
The L2 and L3 inputs are only available only for 8-10 kVA models.
The cable cross-sections for the L2 and L3 lines can be reduced to 2.5 sqmm.
For 8–10 kVA models, the cross-section refers to bare cables (without lugs).
Note:
the length of the cable stripping must be equal to:
-
15 mm for UPS 5-6 kVA
-
18 mm for UPS 8-10 kVA
