Huawei BBU3806 Installation Manual page 45

Installation Manual – Hardware Installation
BBU3806 WCDMA Base Band Unit
Temperature
monitoring
Theft alarm
Smoke alarm
Control over the
power supply and
standby power supply
Item
The system monitors the environment temperature in real
time. If the temperature exceeds the preset limits, the
system will report alarm signals and turn on both air
conditioners.
The system can monitor any possible theft in the
equipment room in real time. It is advisable to use a dual-
mode detector either infrared or microwave.
The system monitors smoke and fire inside the equipment
room in real time.
Automatic charge: When the battery monitoring circuit
detects that the battery runs low, the system charges
the battery automatically.
Charge protection: When the power supply is
abnormal or the charging current is too large, the
system protects the battery.
Discharge protection: The system cuts off battery load
when the battery voltage decreases to an extent that
might harm the service life of the battery.
Upon mains failure, NodeB switches to battery for power
supply. When mains supply recovers, it can switch back
to mains for power supply and charge the battery to fill the
released electric energy.
Huawei Technologies Proprietary
BBU3806 Operating Environment Requirements
Function
3-9
Chapter 3