Publicidad
Idiomas disponibles
Idiomas disponibles
Fuse protection
Fuse protection of the individual module strings depends on which solar modules are
dependent on the
present. A crucial factor is the maximum short circuit current (I
solar modules
concerned.
Criteria for
The fuse for a solar module string must satisfy the following criteria:
selecting the
1.
correct fuse
2.
3.
4.
Key:
I
: Nominal current value of the fuse
N
I
: Short circuit current for standard test conditions according to solar module data
SC
U
: Nominal voltage value of the fuse
N
Fronius recommends Littelfuse fuses. The criteria for selecting the correct fuses must be
Fuse recommen-
satisfied.
dations
e.g.: Maximum short circuit current (I
According to the criteria for selecting the correct fuse, the fuse must have a nominal
current greater than 1.5 times the short circuit current:
5.75 A x 1.5 = 8.625 A
Fuse to be selected: Littelfuse KLKD-10 with 10.0 A and 530 V AC/DC
Nominal current
1.0 A
2.0 A
3.0 A
4.0 A
5.0 A
I
> 1.5 x I
N
SC
I
< 2.00 x I
N
SC
U
>/= 530 V DC
N
Fuse dimensions: 10.3 x 35 - 38 mm
sheet
NOTE! In underrated fuses, the nominal current value is less than the short
circuit current of the solar module.
Effect:
The fuse may trip in intensive lighting conditions.
NOTE! Only select fuses suitable for a voltage of 530 V DC!
Fuse
KLKD-1
KLKD-2
KLKD-3
KLKD-4
KLKD-5
) of the solar module = 5.75 A
SC
Nominal current
10.0 A
15.0 A
20.0 A
25.0 A
30.0 A
5
) of the solar module
SC
Fuse
KLKD-10
KLKD-15
KLKD-20
KLKD-25
KLKD-30
Publicidad
