Fronius Symo 15.0-3 208 - Permitted Cables

The use of string fuses in the Fronius Symo provides additional fuse protection
for solar modules.
The maximum short circuit current I
SC
, the maximum module backfeed current
I
R
and the specification of the maximum string fuse value in the module data
sheet of the respective solar module are decisive factors in the protection of the
solar module.
The maximum short circuit current I
SC
per terminal is 15 A.
The string fuse release current can be set to greater than 15 A if required.
However, a release current of 20 A must not be exceeded.
If the inverter is being operated with an external string collection box, the DC
connector kit 25 (item numbers 42,0201,4479 for DC+ and 42,0201,4480 for
DC-) must be used. In this case the solar modules are externally protected in the
string collection box and the metal bolts should be used in the inverter.
National regulations regarding fuse protection must be observed. The electrical
engineer carrying out the installation is responsible for the correct choice of
string fuses.
CAUTION!
Danger due to defective fuses.
This can result in fires.
▶
Always replace defective fuses with new equivalent fuses.
The inverter is delivered with metal bolts as standard.
Permitted
Cables
AC cables with the following design can be connected to the AC terminals of the
inverter:
Cu / Al Cu
-
Copper (Cu) or aluminum (Al): round, solid
-
Copper: round, stranded, up to conductor class 4
40