Server Technology QUICKSPECS BL20P - Manual (Page 33)

Max total power
supported 3000 W 9000 W 15,000 W
Total max input current
at minimum voltage 69.44 A at -43.2VDC 208.32 A at -43.2 VDC 347.2 A at -43.2 VDC
(equivalent of 175A
per feed)
Total max input current
at nominal voltage 62.5 A at -48VDC 187.5 A at -48 VDC 312.5 A at -48 VDC
(equivalent of 175A
per feed)
Max current per power
feed 70A 210A 210A
Max local ambient
temperature 149° F (65° C) 149° F (65° C)
NOTE: All systems support redundant A & B feeds. Scalable bus bar supports dual A and dual B
feeds.
Operating and
Performance
Specifications for
Facility DC Voltage Nominalinput voltage -48 VDC
Operating voltage range -48VDC ± 10% or -43.2 VDC to -52.8 VDC
Max input voltage slew
rate 0.5V/uS
Redundant feed voltages* *A and B feeds must differ by no more than
5VDC during steady state operation
Ripple/Noise 480 mV PARD**
Overshoot Must remain within regulation limits on all
feeds during startup or shutdown
Voltage Transients Must not exceed -60 VDC
Current Max steady state input
current 62.5A per server blade enclosure installed at
-48VDC
Max steady state current
per feed/total
Power bus boxes 70 A/70A
Mini bus bars 210 A/210A
Scalable bus bars 210 A/350A or equivalent of 175A per feed*
In-rush current Must support up to 2X the maximum operating current per server blade
enclosure (125 A) for up to 1.0 mS
Input over-current Customer provided fusing for facility DC feeds that protects the system
from catastrophic over-current within 20 uS. Fuse should sustain all in-
rush and operating currents.
Max Input Current
Slew Rate 1A/uS
Max Input Curent Slew
Rate 3000W per server blade enclosure
Connection and
Cables HP provided facility DC cable connection kit:
The facility DC connection kit supports the connection of up to four
-48VDC, RETURN pairs and ground.
The power cable assemblies consist of 1/0AWG, color-coded, flexible
cable rated at 105° C, terminated with bus mating connectors at one end
and unterminated at the other end. The cable length provided enables
the customer to route to a fuse panel within or adjacent to the rack.
NOTE: *All systems support redundant A and B feeds. Scalable bus bars support dual A and dual
B feeds.
** Periodic and random noise (PARD). Maximum allowable peak-to-peak ripple and noise (as
QuickSpecs
HP ProLiant BL20p p-Class Server Blade
Technical Specifications
DA - 11411 Worldwide QuickSpecs — Version 24 — 9.24.2004 Page 33