Connecting The Inverter To The Public Grid (Ac) - Fronius Symo Series Installation Instructions Manual

(with a cable diameter of 11 mm the strain-relief force is reduced from 100 N to a maxim-
um of 80 N)
With cable diameters greater than 21 mm, the M32 screw joint must be replaced by an
M32 screw joint with a larger clamping area - item number: 42,0407,0780 - strain-relief
device M32x15 KB 18-25.
Connecting the Note!
inverter to the -
public grid (AC) -
Otherwise, under certain circumstances it may no longer be possible to close the invert-
er.
Note!
-
-
IMPORTANT! The PE ground conductor of the AC cable must be laid in such a way that
it is the last to be disconnected in the event that the strain-relief device should fail.
This can be ensured, for example, by making it somewhat longer and by laying it in a
loop.
1
Form loops with the AC cables when connecting them to the AC terminals.
When securing the AC cables using a metric screw joint, ensure that the loops do
not protrude beyond the connection area.
Make sure that the grid's neutral conductor is grounded. This may not be the case
for IT grids (insulated grids with no earthing); it will then not be possible to use the
inverter.
The neutral conductor must be connected in order to operate the inverter. A neutral
conductor that is too small may adversely affect the inverter feeding energy into the
grid. The neutral conductor must have an amperage of at least 1 A.
2
Fronius Symo
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