Criteria For Selecting The Right String Fuses - Fronius 3.0-3-S Operating Instructions Manual

As an option, the inverter can be supplied with the following fuses:
-
-
DC+ 1.3
DC+ 1.2
Criteria for select- The following criteria must be met for each solar module string when selecting suitable fus-
ing the right es:
string fuses -
-
-
-
I
N
I
SC
U
N
NOTE! To avoid the risk of a fire, only replace faulty fuses with new ones of the
same rating.
6 x 15 A string fuses on the DC+ input and 6 x metal pins on the DC- input
12 x metal pins
Option DC OVP
DC+ 2.1
Do not remove cover! Do not remove cover!
DC+ 1.1
I > 1.8 x I
N SC
I < 2.4 x I
N SC
U >/= max. input voltage of the inverter used
N
Fuse dimensions: diameter 10 x 38 mm
Nominal current of fuse
Short circuit current for standard test conditions (STC) according to the solar mod-
ule data sheet
Rated voltage of fuse
NOTE! The nominal current rating of the fuse must not exceed the maximum fuse
protection specified in the data sheet supplied by the solar module manufacturer.
If a maximum fuse protection is not specified, then this information must be re-
quested from the solar module manufacturer.
DC+ 2.3 DC- 1.2
DC+ 2.2 DC- 1.1
Each Terminal: I Each Terminal: I = I = I
max max SC SC
< 12 A < 12 A
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