Ericsson RBS 2106 Reference Manual page 130

Product Data RBS 2206
6.6.2 Weights
Table 67
Unit
Battery stand, without
batteries
Battery stand, with 2 batteries
Battery stand, with 3 batteries
6.6.3 Output Voltage
The voltage range to the RBS cabinet is +20.2 - 29.0 V DC.
Predefined voltage
Battery low voltage limit
6.6.4 BBS Cabinet Hardware
Battery Fuse Unit
The battery fuse unit (BFU) monitors and controls the batteries. It will
cut off the load (the RBS) when any of the following conditions occur:
•
•
•
The BFU also supplies voltage through two fuses directly to
transmission equipment and/or through the DC/DC converter (optional)
to transmission equipment. BFU-21 supplies through two fuses (12 A),
BFU-22 supplies through one fuse (40 A).
One BFU is needed for each RBS cabinet.
BFU-21 and BFU-22 differ in their power outputs, see Table 66 on
page 126.
DC/DC converter (optional)
The DC/DC converter is located in the BBS and converts +24 V DC
to -48 V DC.
Battery Blocks
The batteries are for stationary use. They are a sealed lead-acid type,
with valve ventilators. The battery is composed of battery blocks in one
128 (485)
BBS 2000 unit weight
A mains failure lasts longer than the back-up time. When the
battery voltage drops below a preset value, the BFU disconnects
the RBS. This is to prevent damaging the batteries by over-
discharging. The BFU continues to feed the transmission
equipment and/or the DC/DC converter until the voltage has
dropped to 20.0 V DC.
The temperature of the batteries is too high.
A short circuit occurs between the distribution cables. This will
release the circuit breaker in the BFU.
© Ericsson Radio Systems AB
— All Rights Reserved —
Weight in kg Weight in lb.
170 375
490 1080
650 1433
+27.2 V DC
+21.0 V DC
EN/LZT 720 0008 P2A
2001-11-28