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

Description of the device

Description of the The inverter transforms the direct current generated by the solar modules into alternating
device current. This alternating current is fed into the public grid synchronously with the grid
voltage.
The inverter has been developed exclusively for use in grid-connected photovoltaic sys-
tems; 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 condi-
tions, 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 conditions.

AC Daisy Chain

With the "AC Daisy Chain" inverter version, the AC lead can be fed directly from the in-
verter 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
imum string fuse rating specified in the module data sheet of the respective solar module
is crucial in affording the solar modules the correct fuse protection.
The national regulations regarding fuse protection must be observed. The electrical en-
gineer carrying out the installation is responsible for the correct choice of string fuses.
To replace the string fuses, see chapter
, the maximum module return current I
sc
Replacing the string fuses
or the max-
R
on page 50.
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