User Manual

Table Of Contents
Ericsson Internal
DESCRIPTION 44 ( 50 )
/ XSNSIXI 129/1551-LZA 701 0001 Uen
CBC/ XRX/M ( Kai Lian) 2011-05-05 F
Prepared (also subject responsible if other) No.
Approved Checked Date Rev Reference
8.1 Power Supply
This section describes the AC mains power supply, the external earth fault
circuit breakers, and the mains fuses.
AC Mains Supply Voltage
Single-phase, two-phase, or three-phase AC can be used.
Table 29 Power Parameters
Parametre Value
Nominal voltage 200 250 V AC
Operating voltage 180 275 V AC
Nominal frequency 50 60 Hz
Operating frequency 45 65 Hz
Maximum inrush current (total, all
phases)
60 A for 10 ms (typical duration)
PSU capacity For RBS 2106 and RBS 2106i: 4 ×
1200 W (4800 W total)
For RBS 2106 V3: 1500 W (6000
W total)
BFU 1 × 200 A
BFU-32 1 × 300 A
External Earth Fault Circuit Breakers
If external earth fault (ground fault) circuit breakers are used, then the
recommended minimum trip value is 100 mA.
Mains Fuses
Table 30 Mains Fuses Recommendation
Minimum for Safe
Function
Recommended for
Maximum Selectivity
Maximum Allowed
Fuse Rating
25 A/40 A
(1)
32 A/50 A
(1)
63 A
(1) Three-phase/Single phase.
8.2 Battery Backup
Battery backup is used to power the site during mains failure and also to protect
the site from short-term interruptions in the mains supply. The backup time is
dependent on for example RBS configuration, traffic load and temperature.