Power Distribution Devices - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
To ensure the normal power supply to other power consumption units when the power
to one of the unit is disconnected due to over current, a separate over-current
protection unit is equipped in the distribution box for each power consumption unit.
Through these protection units, the busbar distributes the power to the terminals on the
back panel, which will supply the power to various consumption units.

5.2.3 Power Distribution Devices

I. PSU
AC/DC
The PSU
converts the ~220V AC (local mains) into –48V DC; the later detects status of the
PSU
AC/DC
II. PSU
DC/DC
The PSU
a power monitor. The former converts the –48V DC into +24V DC; the later detects
status of the PSU
III. Batteries
Note:
Batteries are optional.
When the local mains supply fails, batteries can maintain the normal operation of the
BTS for a period of time. A built-in battery subrack and an auxiliary battery cabinet are
available to satisfy different requirements.
Built-in battery subrack
The built-in battery subrack is configured in the auxiliary cabinet. It can be installed with
four 12V/65Ah storage batteries to maintain the normal operation of the BTS2612A in
S(1/1/1) configuration for more than 30 minutes.
Auxiliary battery cabinet
The auxiliary battery cabinet can hold up to twenty-four 2V/650Ah or 2V/300Ah or
2V/200Ah batteries to power the system for a longer period after the mains failure. An
auxiliary battery cabinet fully configured with twenty-four 2V/650Ah batteries can
support the normal operation of BTS3612A in S(1/1/1) configuration for more than eight
hours.
is composed of an AC-DC converter and a power monitor. The former
AC/DC
and reports alarms.
is composed of a Direct Current - Direct Current (DC-DC) converter and
DC/DC
and reports alarms.
DC/DC
Chapter 5 Power & Environment Monitoring Subsystem
5-5
System Principle