7
ENGLISH
MASTERYS
BC 60-80 kVA - Ref.: IOMMASBCXX06-EN 06
ENGLISH
2. UNPACKING AND INSTALLATION OF THE UNIT
2.3. ELECTRICAL
REQUIREMENTS
The installation and 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 differential switch is installed on the mains power switch (optional), it must be inserted upstream from the distribution panel.
The table below shows the size of the input protection devices recommended for correct installation.
Size of the input protection devices
UPS
Magneto-thermal
input
(1)
Magneto-thermal
Aux Mains
(1)
Diff erential
input
(5)
Input/Output cable
core size
Battery cable
core size
Battery
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)
60 3/3
125
160
125
160
0.5
35
50
50
95
200 aR
80 3/3
160
200
160
200
0.5
50
50
70
95
200 aR
1. Magneto-thermal switch recommended: four poles with intervention threshold ≥10 In (curve C). It is necessary to use a D curve selective
breaker if an optional external transformer is used.
2. In systems with two or more UPSs operating in a redundant or power parallel confi guration.
3. 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 diff erentials. 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 diff erential protec-
tion. 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
defi nitive load, so as to prevent the sudden activation of the above switches.
6. Use 2500 aR for a battery cabinet with capacity exceeding 90 A.
This unit has been designed for connection to an ordinary AC power supply, i.e. with transient voltage in overvol-
tage 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 protection devices must be installed.
GENSET must support load variations from 0 to 100%.
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.
WARNING!
This is a product for commercial and industrial application in an industrial environment - installation restrictions
or additional measures may be needed to prevent interference.
IMPORTANT!
Protective earthing conductor (PE) must have sufficient current-carrying capacity.
The PE cable core size must be chosen according to the PROTECTIVE CURRENT RATING of the earth circuit
which depends on the provision and location of protective overcurrent devices.
