Power Distribution; Ac Distribution - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station

5.2 Power Distribution

5.2.1 AC Distribution

The BTS3612A supports four types of AC power supplies: three-phase 220V AC,
single-phase 220V AC, three-phase 110V AC and single-phase 110V AC.
I. Distribution of three-phase 220V AC
The three-phase 220V AC passes through the lightning protector and the
ElectroMagnetic Interference (EMI) filter before reaching the AC distribution unit. From
the AC distribution unit, the power is distributed to the voltage regulator, PCU
power sockets (reserved). Each distribution path is protected with an air switch at the
input end. Detailed distribution paths are shown in Figure 5-2.
A
B
220VAC
C
N
Figure 5-2 Distribution of three-phase 220V AC
The air switch, lightning protector and EMI filter are all installed in the power lightning
protector/filter box.
II. Distribution of single-phase 220V AC
If the single-phase 220V AC is used for the BTS3612A, a wiring terminal for phase
conversion should be equipped before the air switch to convert the single-phase power
into three-phase power. The power distribution in the cabinet is the same as that of the
three-phase 200V AC, as illustrated in Figure 5-3.
Chapter 5 Power & Environment Monitoring Subsystem
AC distribution unit
32A
A
N
10A
63A
B
N
63A
C
Lightning
arrester
N
5-2
Voltage
A,N
regulator
B,N
C,N
System Principle
and
AC/DC
Air conditioner/heat
exchanger
Reserved
+24V DC
PSU
AC/DC
+24V DC
PSU
AC/DC