4 dc fuse/breaker, Table g — recommended dc fuse/breaker – Alpha Technologies AMPS80 HP User Manual
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Doc. #: 026-069-B0 Rev F
3.4 DC Fuse/Breaker
Alpha recommends using fuses instead of breakers because they provide better fault protection.
The recommendations in Table G 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.
NOTE:
Table G — Recommended DC fuse/breaker
Model
AMPS
80-3-75
AMPS
80-3-75-H2
AMPS
80-3-30
AMPS
80-3-30-H2
AMPS
80-2-40
AMPS
80-2-40-H2
AMPS
80-2-20
AMPS
80-2-20-H2
DC
input
Maximum DC Input wattage
67 kW
27 kW
36 kW
18 kW
Maximum DC Input Current
@ 48 Vdc, full load
1396 A
563 A
750 A
375 A
DC input current @ 40 V
110% load
1843 A
743 A
990 A
495 A
Maximum DC input breaker
2500 A, maximum 50 kA SCC
Recommended
minimum DC fuse/
breaker rating
(100% rated, per
feed)
Single DC
feed
2000 A
800 A
1000 A
500 A
Dual DC
feed
1200 A
400 A
500 A
250 A
Quad DC
feed
600 A
200 A
250 A
125 A