1 to 600 A
|Fusib 013||Fusib 026||Fusib PV 016|
|Fusib PV 018||Fusib PV 021|
|Breaking capacity up to 1000 VDC|
|Product dedicated to PV applications.|
ISC: short circuit current of the string
ISC MAX : short circuit current of the string related to maximum sunlight density
IRM: maximum admitted reverse current
In: fuse rating or fuse rated current (at 25°C in a RM disconnect switch).
Nc: number of strings connected in parallel
Ue: maximum fuse rated voltage.
UOC MAX: maximum open circuit voltage in the lowest temperature conditions.
When to protect
- A PV string requires an over-current protection when its own maximum admissible reverse current characteristic (Irm) is less than the current generated by the rest of the installation (current generated by the “Nc-1” other strings).
How to protect
- The overload protection is to be applied at each of the two polarities, regardless of whether the DC installation is earthed or not.