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
Fronius Symo 15.0-3 208
1
With Fronius Symo 15.0-3 208, the
three phases and neutral conductor
must be fed through a ferrite ring. The
ferrite ring is included in the scope of
delivery for the inverter.
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
tightened 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 disconnected last.
Measure the ground conductor GND longer, for example, and loop.
0.6 in. (15 mm)
AC
~
PE
PE
1
OFF
1
PEPE
Torque (Nm /
lbf.in.) → see
printing near
wire terminal
PE
2
30
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