A30808-X3247-L14-2-7618
43
Information
Base Station System
Technical Description (TED:BSS)
BS-240/241
Fig. 3.11
Example of Battery Backup Systems Connected to the AC/DC
The maximum DC-Output-Power of one Frame AC/DC is limited to 3600W. The
maximum current out of one battery system is limited to 50A (respectively 2400W at
48V). All battery systems connected to one or two frames AC/DC should have the same
battery capacity. See section
Power Supply and Battery Backup
for more details.
3.18
Fan
The fan unit is responsible for creating a sufficient airflow in order to cool the inner elec-
tronics using all the effects of forced convection cooling. The cooling concept is based
upon a cascaded principle of six Fan Units: two fans are responsible for each Frame.
The fans used are able to overcome the pressure drop caused by the system resistance
taking into account additional losses caused by adequate filters or Heat Exchangers
used in order to establish an airflow that limits the
∆
T (Temperature difference between
critical hotspots inside the Rack and the ambient temperature) caused by the specific
power dissipation of that hotspot.
Battery 0
Base Frame for AC/DC Converter
D
C
B
C
T
R
L
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
Battery System 0
DC line (max. 50 A)
DC line (max. 50 A)
Battery System 1
Battery System 2
DC line (max. 50 A)
DC line (max. 50 A)
Battery System 3
Battery 1
Battery 2
Battery 0
Battery 1
Battery 2
Battery 0
Battery 1
Battery 2
Battery 0
Battery 1
Battery 2
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Base Frame for AC/DC Converter
D
C
B
C
T
R
L
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
AC
DC
-
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