MASTERYS BC
from 15 to 20 kVA
12
IT
ALIANOENGLISH
3.4 ELECTRICAL REQUISITES.
The installation and the system must comply with national plant regulations. The electrical distribution panel
must have a protection and sectioning system installed for the input mains and the auxiliary mains. If a differen-
tial switch is installed on the mains power switch (optional), it must be inserted upstream from the distribution
panel.
The table below show the size of the input protection devices recommended for correct installation.
This unit has been designed for connection to an ordinary AC power supply, i.e. with transient vol-
tage in overvoltage II category. Should it be necessary to connect the UPS to a higher overvoltage
category (e.g. at the beginning of the installation, or to primary distribution circuits), or should the
UPS risk being exposed to higher transient overvoltages, adequate external protections must be
installed.
In the event of three-phase distorting loads connected in output, the current on the neutral
conductor may have a value that is 1.5 - 2 times the phase value (also for the input bypass). In
this case, size the neutral cables and the input/output protection adequately.
3
UNPACKING AND INSTALLATION
OF THE UNIT
Size of the input protection devices
UPS Magneto-thermal
Magneto-thermal
Differential
Input/Output
Battery
Battery
input
1
Aux Mains
1
input
5
cable core size cable core size protection
4
(kVA)
(A)
(A)
(A)
(mm
2
)
(mm
2
)
(A)
single parallel
2
single parallel
2
selective type
5
Min
Max
3
Min Max
3
15 /1
2
40
100
125
0,5
6
5
6
25
50 Gg
100
125
25
if common if common
aux mains
input
input
and output
mains
mains
e uscita
20 /1
40
6
125
160
0,5
10
5
10
25
6 Gg
125
160
5
if common if common
aux mains
input
input
and output
mains
mains
e uscita
15 /
2
40
2
40
0,5
6
25
6
25
50 Gg
20 /
40
6
40
6
0,5
10
25
10
25
6 Gg
1
D curve magneto-thermal switch recommended.
2
In systems with two or more UPSs operating in a redundant or power parallel configuration.
Determined by the size of the terminals.
4
protection on the external battery cabinet (preferably 2 bipolar protection devices or one quadripolar).
5
Caution! Use selective type differentials. load leakage currents are added to those generated by the UPS and during transitory phases
(power failure and power return) short current peaks may occur. If loads with high leakage current are present, adjust the differential
protection. It is advisable in all cases to carry out a preliminary check on the earth current leakage with the UPS installed and operational
with the definitive load, so as to prevent the sudden activation of the above switches.
Содержание Masterys MAS2BC115M+D1
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