Alpha Technologies AMPS HP2 Power System Installation & Operation Manual page 45

5.1.1 DC Fuse/Breaker AMPS HP2: Rack Mount
Alpha recommends using fuses instead of breakers because they provide better fault protection.
NOTE:
The recommendations in Table B 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 B — Recommended DC fuse/breaker
DC
input
Recommended minimum
DC fuse/breaker rating
(100% rated, per feed)
0260080-J0 Rev D
Model
Maximum DC Input wattage
Maximum DC Input Current
@ 48 Vdc, full load
Single DC feed
Dual DC feed
27kW 18kW
555A 375A
700A 500A
350A 250A
9kW
188A
250A
125A
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