48 To -60 V Dc Supply Voltage; Battery Back-Up - Ericsson RBS 2207 Product Description

RBS 2207
Fuses
Table 12
Minimum for Safe
Function
1x80 A
(1) May be used when no transmission and/or optional equipment is installed.
7.3

-48 to -60 V DC Supply Voltage

Table 13
Nominal
Range
Non-destructive range
Inrush current
Fuses
Table 14
Minimum for Safe
Function
2x32 A
7.4

Battery Back-up

Battery back-up can be used to power the site during mains failure and to
protect the site from interruptions in the AC mains supply. It is available in an
external cabinet.
In the event of mains failure, the batteries in the BBS 2000 or BBS 2202
deliver the necessary power to the radio cabinet as well as to the transmission
equipment, if used. This enables the radio system to continue operating during
mains failure. The transmission equipment is provided with power supply
longer than the RBS.
Battery back-up can be delivered for at least 1, 2, 4, 6 or 8 hours back-up time,
depending on the chosen configuration of the RBS. The BBS can feed +24 V
DC or -48 V DC to transmission equipment. The -48 V DC supply requires an
internal DC/DC converter in the BBS. It is possible to share battery back-up
between an RBS 2202 or 2206 and an RBS 2207.
20 (24)
+24 V DC fuse recommendation
Recommended for
Maximum Selectivity
(1)
1x100 A
DC supply voltage requirements
-48 to -60 V DC fuse recommendation
Recommended for
Maximum Selectivity
2x35 A
Maximum Allowed
Fuse Rating
1x200 A
-48 to -60 V DC
-40.0 to -72.0 V DC
+0 to -80 V DC
200 A (0.1 - 5 ms)
Maximum Allowed
Fuse Rating
2x40 A
EN/LZT 720 0134 Uen R3A