27
EN-US
IMPORTANT! Do not use brushes, files, or sandpaper; aluminum particles may get stuck
and can transfer to other cables.
After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid-free
and alkali-free Vaseline
Then immediately connect it to the terminal
IMPORTANT!Repeat the steps above whenever the cable is disconnected and then re-
connected.
Monitoring the
grid
The resistance in the leads to the AC-side connection terminals must be as low as possible
for optimal functioning of grid monitoring.
Fronius Symo
15.0-3 208 – fer-
rite ring
1
Fronius Symo 15.0-3 208
With Fronius Symo 15.0-3 208, the three
phases and neutral conductor must be fed
through a ferrite ring. The ferrite ring is in-
cluded in the scope of delivery for the inver-
ter.
The ground conductor (PE) must not be fed
through the ferrite ring.
Connecting the
Inverter to the
Public Grid (AC)
NOTE!
To ensure a proper ground connection, all grounding terminals GND must be tight-
ened with the specified torque during installation.
NOTE!
Form loops of at least 4 in. (102 mm) in the AC cables when connecting them to the
AC terminals.
IMPORTANT! The ground conductor GND of the AC cable must be laid so that it is discon-
nected last.
Measure the ground conductor GND longer, for example, and loop.
2
3
Fronius Symo
15.0-3 208
1
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