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000327BG
5 - Installation
G
rid output connection (AC side)
For the connection of the inverter to the grid, you can choose between a
star connection (3 neutral) and a delta connection (3 phases).
In any case, connection of the inverter to ground is mandatory.
The cable you use can be 5-pole (star configuration) or 4-pole (delta
configuration) and must pass through the
AC cable gland to make the
connections to the AC output terminal block.
C
haracteristics and sizing of the protective earthing cable
ABB inverters must be earthed via the terminal with the protective earth
symbol ( ), using a cable with an appropriate conductor cross-section
for the maximum ground fault current that the generating system might
experience.
Any failure of the inverter when it is not connected to earth through the appropriate terminal is not
covered by the warranty.
In compliance with standard IEC 62109 it is necessary:
• To install a copper earthing cable on the AC output terminal block
31
with a minimum section of 10 mm
2
.
• Alternatively it is possible to install a second earthing cable (with the
same section as the one installed on the AC output terminal block
31
) on
the connection point located on the underside of the inverter and marked
with the symbol .
Installation of a second protective earthing cable is also required by regu-
lations in force in certain countries of installation.
If necessary, carefully read the instructions provided in the paragraph “Installation of the se-
cond protective earthing cable”.
L
oad protection switch (AC disconnect switch)
It is recommended that the inverter AC connection line be fitted with a
device to protect against maximum current and leakage to ground, with
the following characteristics:
TRIO-5.8-TL-OUTD
TRIO-7.5-TL-OUTD
TRIO-8.5-TL-OUTD
Type Automatic circuit breaker with differential thermal-magnetic protection
Voltage/current rating
400V / 16A
Magnetic protection characteristic
B/C
Differential protection type
A/AC
Differential sensitivity
300mA
Number of poles
3/4