44
2. The voltage rating of the fuse must be at least 1000V
DC
.
3. The ampere rating of the fuse is generally selected as 1.56 × module
Isc of the PV string. Refer to NEC 690.8 for Circuit Sizing and Current
requirements.
UL listed, 1000V
DC,
20A, 10.3 x38mm cylindrical, PV fuses from Sinofuse
(manufacturer) are recommended as replacement fuses when necessary.
For fuse values of smaller or greater than 20A (25A or 30A), please contact
our after-sale personnel.
The touch safe fuse holders and wirebox internal factory wiring are
designed to accept either 15A, 20A, 25A, or 30A rated fuses. The larger
rated fuses may be required for combined input strings; for example,
when Y branch connectors are used with DC field wiring to reduce PV
source circuit home runs. CPS allows replacement of the factory installed
20A fuses with appropriate ampere ratings, however CPS does not
provide nor stock these fuses.
NOTICE:
When installing replacement 25A or 30A fuses, these fuses may not
be installed in adjacent fuse holders. An empty or unused fuse holder
must be positioned between each 25A/30A fuse within each MPPT.
When Y branch connectors or harnesses are used with DC field
wiring to reduce PV source circuit home runs, the Y-Comb Terminal
Block may be used as an optional accessory. Refer to section 0 for
further detailed information.
Use of fuses from other manufacturers or incorrectly sized fuses can
cause either equipment damage or create an unsafe working
condition. Any damage resulting from use of incompatible fuses is
not covered by the CPS warranty.
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