25
EN
9.3 Characteristics and sizing of the line cable
Depending of the type of the AC panel it’s possible to use single conductors cables or a multipolar cable:
• Single-core configuration have 3xM40 cable glands
(11)
for the “R”, “S”, “T” phases and a M32 cable gland
(12)
for the grounding cable.
• Multi-core configuration (optional) have a M63 cable gland
(11)
for the “R”, “S”, “T” phases and a M32 cable
gland
(12)
for the grounding cable.
The cross-section of the AC line conductor must be sized in order to prevent unwanted disconnections of the
inverter from the grid due to high impedance of the line that connects the inverter to the power supply point.
Single conductor cable
Multipolar cable
Cable diameter range
22 - 32 mm
37 - 53 mm
Min. conductor cross section
50 mm²
Cable lug dimensioning
b a
for M10 Stud
a = 10.5 mm (min)
b = 40 mm (max)
ATTENTION –
A
The AC connection busbars
(27)
are in copper tin-plated; therefore if aluminum
cables are used, the correct coupling with the copper bars must be guaranteed by using appropriate
bi-metallic cable lug.
9.4 AC output cables connection
WARNING –
B
Before carrying out any
operation, check that any external AC switch
downstream to the inverter (grid side) are in
OFF position and check for voltage absence
on the AC conductors!
Routing of the AC cables inside the inverter must
be carried out from the right side of the inverter.
Depending of the version of the AC panel installed
on the inverter it will be necessary to route the AC
output and ground cables into different ways:
Single-core configuration (default):
3xM40
cable glands
(11)
for the “R”, “S”, “T” phases and
a M32 cable gland
(12)
for the grounding cable.
In this configuration the AC output and ground
cables must be inserted into the proper cable
glands, trying to follow a logical order based on the
position of the internal connections:
R = Phase R (indicated
with a label near the AC
connection busbar
(27)
)
S = Phase S (indicated
with a label near the AC
connection busbar
(27)
)
T = Phase T (indicated
with a label near the AC
connection busbar
(27)
)
The ground connection can be made using the
Protective earth point (int.)
(28)
, Protective
earth point (ext.)
(10)
or both (this is required
by regulations in force in certain countries of
installation).
= Ground (indicated with the protective earth
symbol
near the protection earth connection
point (int.)
(28)
or protection earth connection
point (ext.)
(10)
).
Multi-core configuration (optional):
one M63 cable
gland
(11)
for the “R”, “S”, “T” phases and a M32
cable gland
(12)
for the grounding cable.
This version of the AC panel can be ordered
separately. Refer to “Kit of recommended spare
parts” chapter for further information.
11
12
PE
RST
PE
12
11
PE
S
T
R