- 59 -
000327BG
5 - Installation
C
haracteristics and sizing of the line cable
The cross-section of the AC line conductor must be sized in order to pre
-
vent unwanted disconnections of the inverter from the grid due to high
impedance of the line that connects the inverter to the power supply; If
the impedance is too high it causes an increase in the AC voltage that,
on reaching the limit set by the standards in the country of installation,
causes the inverter to switch off.
The table shows the maximum line conductor length in relation to the
section of the conductor itself:
Line conductor cross section (
2
mm)
Line conductor maximum length (mt)
TRIO-5.8-TL-OUTD TRIO-7.5-TL-OUTD TRIO-8.5-TL-OUTD
4
55m
40m
35m
6
80m
60m
55m
10
135m
105m
90m
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
C
onnection to terminal block AC side
To avoid risks of electrical shock, all wiring operations must be carried out with the disconnect
switch downstream of the inverter (grid side) off.
Be careful not to invert any phase with neutral!
High leakage current. Grounding is essential before connection to the power supply network.
For all inverter models, connection is carried out using the AC output ter-
minal block
31
passing the cables internally through the AC cable gland
15
.
The maximum acceptable cable diameter is between 13 to 21 mm, while
each terminal clamp on the terminal block accepts a cable with a maxi-
mum cross-section of 10 mm
2
.
1
R S T N
05
31
15
Max 10 mm
2
13 ÷ 21 mm