Product Specification For Power And Battery Cabinet - Ericsson CME 20 R6.1 Reference Manual

6 Product Specification for
Power and Battery Cabinet
This chapter describes the architecture of the Power and Battery Cabinet
(PBC), and specifies its characteristics and performance.
6.1 Terminology
TN Power System
TT Power System
IT Power System
Link Equipment
Second PBC
Replaceable Unit
6.2 General
The PBC serves as a common base for battery back-up and power
supply to the Active Antenna, the micro RBS and optional transmission
equipment (link equipment). The PBC is also an interface for alarms
from the Active Antenna and the RBS.
After a complete discharge of the battery the recharging time is less
than 24 hours.
In order to reuse already developed parts the mechanical outline is
similar to Ericssons micro basestation family. The units are based on
modular, standardized assembly structure.
Easy access of the batteries for maintenance without disturbing the
traffic.
The weather-proof cabinet and design make it ideal for installation
indoor, outdoor, on poles, walls or masts.
EN/LZT 123 2697 R5A
1998-08-13
Product Specification for Power and Battery Cabinet
TN Power System is a power distribution
system having one point directly earthed .
The exposed conductive parts of the
installation are connected to that point by
protective earth connectors.
TT Power System is a power distribution
system having one point directly earthed .
The exposed conductive parts of the
installation are connected to earth
electrodes electrically independent of the
earth electrodes of the power system.
IT Power System is a power distribution
system having no direct connection to
earth. The exposed conductive parts of the
electrical installation are earthed.
Link Equipment is used to establish
contact with the BSC if there is no fixed
network between the RBS and the BSC.
A second PBC is used in configurations
which require two AAUs connected to one
RBS.
In this document Replaceable Unit refers
to units that are replaceable on site.
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