Fronius Eco 25.0-3-S, Operating Instructions Manual

Page: 12 / 196

12
Criteria for select -
ing the right
string fuses
The following criteria must be met for each solar module string when selecting suitable fus -
es:
- I
N
> 1.8 x I
SC
- I
N
< 2.4 x I
SC
- V
N
>/= maximum open circuit voltage of pv generator
- Fuse dimensions: diameter 10 x 38 mm
I
N
Nominal current of fuse
I
SC
Short circuit current for standard test conditions (STC) according to the solar mod -
ule data sheet
V
N
Rated voltage of fuse
NOTE!
The nominal current rating of the fuse must not exceed the maximum fuse protec -
tion specified in the data sheet supplied by the solar module manufacturer.
If a maximum fuse protection is not specified, then this information must be requested from
the solar module manufacturer.