Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
Criteria for selecting the right fuses
Type of fuse
The type of fuse protection needed for the DC isolating box 40/60 will depend upon the
protection,
solar modules to be connected to it. The key factor here is the maximum short-circuit
depending upon
current (I
the solar
modules
Criteria for
When implementing fuse protection for strings of solar modules, the following criteria
selecting the
must be met for each string:
right fuses
-
-
-
-
I
................ Rated fuse amperage
N
I
SC
U
N
Consequences of
If the fuses are inadequately dimensioned (i.e. too small a rating), the rated fuse
inadequately
amperage is smaller than the short-circuit current of the solar module.
dimensioned
Consequence:
fuses
In conditions of intense sunlight, the fuse may trip.
Fronius recommend using Littelfuse fuses. Each fuse must be dimensioned in
Recommended
accordance with the "Criteria for selecting the right fuses".
fuses
e.g.: maximum short-circuit current (I
As specified in the "Criteria for selecting the right fuses", the rated fuse amperage must
be bigger than a multiple of 1.5 times the short-circuit current:
5.75 A x 1.5 = 8.625 A
Fuse to be selected: KLK D 9 with 9.0 A and 600 V AC / DC
Rated amperage
) of the respective solar module.
SC
I
> 1.5 x I
N
SC
I
< 2.00 x I
N
SC
U
>/= 600 V DC
N
Fuse dimensions: ∅ 10.3 x 35 - 38 mm
.............. Short-circuit current under standard test conditions, as stated in the data
specification sheet for the solar modules (STC)
.............. Rated fuse voltage
NOTE!
Only select fuses, which are suitable for a voltage of 600 V DC!
Fuse
1.0 A
KLK D 1
1.5 A
KLK D 1
2.0 A
KLK D 2
2.5 A
KLK D 2
3.0 A
KLK D 3
3.5 A
KLK D 3
4.0 A
KLK D 4
5.0 A
KLK D 5
) of the solar module = 5.75 A
SC
Rated amperage
6.0 A
/
7.0 A
1
2
8.0 A
/
9.0 A
1
2
10.0 A
/
12.0 A
1
2
15.0 A
20.0 A
7
Fuse
KLK D 6
KLK D 7
KLK D 8
KLK D 9
KLK D 10
KLK D 12
KLK D 15
KLK D 20
Werbung
Kapitel
Inhaltsverzeichnis
Fehlerbehebung
