Eaton PV240 User Manual page 36

G. DC Protection
This is the over current and over voltage protection that is used for the Direct
Current (DC) side. According the NEC 690.15-18, fuse holders can be used
to disconnect the PV modules for serving.
The Eaton grid-tied PV Inverter is shipped with dummy fuses (solid aluminum
cylinders in the shape of the proper fuses). Since there are four pairs of DC
input ports, four fuse holders shall be equipped for the four positive (+)
polarity ports and others fuse holders are equipped for the four negative (-)
polarity ports. Therefore, there are supports to have eight fuse folders, total,
to the DC-side as shown in figure 6.2.14.
Figure 6.2.14: Location of DC Fuses Holders
IMPORTANT
The Eaton grid-tied PV Inverter is shipped with a dummy fuse in
the fuse holder. It is necessary to select the proper series fuse
depending with the solar modules that are used. Remove all
dummy fuses prior to installation and operation.
The installer or qualified service personnel should select the required DC
fuses during the installing procedure. The rating selection of the DC
protection fuses should be selected based on the amount of solar modules
connected in the PV system.
The criterion of fuse selection can be calculated by a standard formula in
order to help the installer or service personnel to select the correct rating of
fuse to use.
Eaton Corporation Page 36 Ver 1.1