Electrical Connection
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Figure 4-8 Supported IT power grid
Up to 20 inverters may be connected in parallel for use with a single transformer.
4.5.3
DC Wiring
DC fuse configuration
The inverter is equipped with 20A DC fuses. Customers must verify that the
appropriate fuses are installed depending on the actual configuration of PV strings.
Each MPPT DC input from the PV that has more than 2 strings requires
fuse protection. For MPPT DC input with 2 strings or less no DC fuse
protection is required.
The rated voltage of the fuse should be 1500VDC. ADLER series
1500VDC fuse are recommended.
The rated current of the fuse is generally 1.56 × short circuit current
from the PV strings, rounded up to the next available fuse size.
The following table lists the names, types and specifications of ADLER series
fuses, which are within the rated voltage of PV panels.
Names
Standard 20A fuses
25A fuses
30A fuses
35A fuses
Types
A74
A74
A94
A94
Spec.
20A/1500V
25A/1500V
30A/1500V 35A/1500V
Table 4-6 DC Fuse selection
WARNING!
Replace only with the same ratings and type of fuses.
Different fuses or incorrectly sized fuses could result in
equipment damages or unsafe working conditions.
Any damage resulting from incompatible fuses is not
covered by warranty.
CAUTION!
Disconnect supply before replacing fuses.
