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4.1.1 DC Fuse/Breaker AMPS HP2: Box Bay
Alpha recommends using fuses instead of breakers because they provide better fault protection.
NOTE:
The recommendations in Table A are for reference only. A registered professional
engineer must review and approve or modify these recommendations in compliance
with applicable national and local electrical and building codes.
Table A — Recommended DC fuse/breaker
Maximum DC Input wattage
Maximum DC Input Current
@ 48 Vdc, full load
DC
Maximum DC input breaker
Input
Recommended minimum
DC fuse/breaker rating
(100% rated, per feed)
20
Model
2500 A, maximum 50 kA SCC
Single DC
feed
Dual DC
feed
Quad DC
feed
67 kW
36 kW
1396 A
750 A
1800 A
1000 A
1200 A
500 A
600 A
250 A
0260080-J0 Rev D
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