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G
rid output connection (AC side)
In case of an isolation transformer is installed in the energy plant, it's mandatory to use the star
configuration for the LV winding of isolation transformer (inverter side) with the center of star (neu-
tral) referred to the ground.
Any failure of the inverter when it is not connected to earth through the appropriate terminal is not
covered by the warranty.
C
haracteristics and sizing of the line cable
max 16 mm
2
19 ÷ 28 mm
Cross-section of the
line conductor (mm
)
2
4 mm²
6 mm²
10 mm²
16 mm²
*Up to 45 °C Ambient temperature
The values are calculated in nominal power conditions, considering:
- loss of power along the line no greater than 1%.
- use of copper cable, with HEPR rubber insulation and positioned in open air.
For the connection of the inverter to the grid, you can choose between a
star connection (3 phases + neutral) and a delta connection (3 phases).
In any case, connection of the inverter to ground is mandatory.
Plug the grid cable into the inverter using the specific AC cable gland
and connect the AC output screw terminal block
Use a properly sized 5-pole cable (star configuration) or 4-pole cable
(delta configuration) cable and check the tightness of the AC cable gland
at the end of the installation.
11
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; In fact, if the impedance is too high, it causes an increase in the
AC voltage that, on reaching the limit set by the country of installation,
causes the inverter to switch off.
The table shows the maximum length of the line conductor based on the
cross-section of this conductor:
Maximum length of the line conductor (m)
PVI-6.0-TL-OUTD PVI-8.0-TL-OUTD PVI-10.0-TL-OUTD PVI-12.5-TL-OUTD
55 m
80 m
135 m
210 m
43 m
34 m
65 m
51 m
108 m
85 m
173 m
136 m
- 54 -
5 - Installation
11
.
15
28 m*
42 m
70 m
113 m
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