Description Of The Device; Ac Daisy Chain; String Fuses - Fronius Tauro 50-3 Operating Instructions Manual

Description of the device

Description of The inverter transforms the direct current generated by the solar modules into
the device
alternating current. This alternating current is fed into the public grid synchron-
ously with the grid voltage.
The inverter has been developed exclusively for use in grid-connected photovol-
taic systems; it is impossible to generate energy independently of the public grid.
Thanks to its design and the way it works, the inverter is extremely safe both to
install and to operate.
The inverter automatically monitors the public grid. In the event of abnormal grid
conditions, the inverter ceases operating immediately and stops feeding power
into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding condi-
tions.

AC Daisy Chain

With the "AC Daisy Chain" inverter version, the AC lead can be fed directly from
the inverter to another inverter. Several Tauro inverters, up to an output power of
max. 200 kW, can be thereby be quickly connected to one another.
The minimum cable cross-section is defined by the fuse at the mains connection
point. A larger cable cross-section can be selected at any time. The applicable
national standards must be taken into account and applied.

String fuses

Only applies to device types Fronius Tauro 50-3-D / Eco 50-3-D / Eco 99-3-D /
Eco 100-3-D (direct):
String fuses are used in the Fronius Tauro to provide additional protection for the
solar modules.
The maximum short circuit current I
the maximum string fuse rating specified in the module data sheet of the re-
spective solar module is crucial in affording the solar modules the correct fuse
protection.
The national regulations regarding fuse protection must be observed. The elec-
trical engineer carrying out the installation is responsible for the correct choice
of string fuses.
, the maximum module return current I
sc
or
R
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