Installation24
Checking String Fuses
REFUsol 100K
982059/02
2020-11
Fig. 23: DC cable routing for decentral ConnectionBox
8. Fasten DC cables to the strain relief rail with cable
ties.
9. Check the tightness of all cables.
4.8 Checking String Fuses
PV String Fuses are used to protect the PV strings
from back currents in a failure condition (i.e. ground
fault). The ConnectionBox is pre-equipped with PV
string fuses gPV with 1 100 V and 15 A Rating. The for-
mat is 14 x 51 mm.
NOTICE
The installer is responsible for the correct sizing of the
fuses in regards to the solar panels specifications and
national or normative regulations.
WARNING
▸ Change the string fuses only using the fuse pliers when
DC and AC connections are de-energized.
WARNING
Even with the DC switch off, the DC string terminals and
string fuses still carry lethal voltage!
▸ Pull the fuse cautiously out of the fuse holder in order
not to damage them. Try to pull one side, then the other
side to reduce the force.
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