User Manual

Cabinet description
Nortel Networks Confidential
1–136
PE/DCL/DD/0063
411–9001–063
Standard 12.07/EN September 2000
GSM/BSS V12
1.4 Power supply
1.4.1 S8000 Outdoor
The power system supplies 48 V dc power to the units in the cabinet from the mains
power supply.
1.4.1.1 Description
The power system can have the following configurations:
for the S8000 Outdoor BTS:
• an ac box, a Power Controller Unit (PCU), a set of 600W rectifier units (SRU)
and a set of batteries
• an ac box, a Controller Module, a set of 500W Rectifiers, a Distribution
Module and a set of batteries
The controller module and distribution module make up the PCU.
The PCU connects the rectifiers to the cabinet units and to the batteries (only for
S8000 Outdoor BTS).
In this section, the SRU refers to both types of rectifier sets.
The PCU can be connected to a set of several rectifiers whose outputs are connected
in parallel:
for S8000 Outdoor BTS:
• either a set of two to six 600W rectifiers (one for redundancy)
• or a set of two to seven 500W rectifiers (one for redundancy)
Only for the S8000 Outdoor BTS, the PCU is connected to the batteries located
either inside or outside the cabinet. It has four separate outputs (outputs 1 to 4) that
supply the cabinet utilizations.
There are two types of battery units:
internal batteries mounted on the top of the cabinet, which consist of four
12 V dc batteries in series (one string)
external batteries located in the external battery cabinet, and configured in a
maximum of four strings. Each string consists of four 12V dc batteries in series;
the four strings being connected in parallel.