Hello there community members!
I would like to share some information about PMU, which is an important part of BTS3900 and ETP, and steps to configure PMU on BTS3900.
Where PMU is one of the important pieces of Huawei BTS3900 and ETP, PMU is very important in the cabinet because it performs very important tasks.
PMU Functions.
A- Intelligent battery management
1- Load high temperature disconnection
2- Battery high temperature disconnection
4- Battery boost charge management
5- Battery floating charge management
6- Battery discharge test
7- Battery temperature compensation.
B- Remote monitoring
1- AC input voltage
2- Load current
3- Battery string current
4- DC busbar voltage
5- Battery temperature
6- Ambient temperatures and humidity
7- Analog parameter.
C- Remote control
1- Powers on and off rectifiers.
2- Charges rectifiers in equalized or float charging mode.
3- Adjusts rectifier voltages.
4- Limits rectifier currents.
5- Powers on and off storage batteries.
6- Controls current limiting for the D.G. storage battery.
7- Monitors the buzzer.
8- Controls the dry contact outputs (including one dry contact output for detecting the D.G.)
D- Remote communications
1- Detects the mains supply and monitors the mains for overvoltage and undervoltage.
2- Monitors the DC for overvoltage and undervoltage.
3- Reports alarms for load fuse blown, charge overcurrent, battery disconnection (by the NetEco or due to high temperatures or low voltages), over high or over low ambient temperatures, n # module faults, battery loop broken, and surge protection device (SPD) failures.
4- Reports the rectifier output current.
5- Protects the n# module.
6- Monitors door status, water intrusion, smoke generation, and Boolean value inputs.
If PMU unit has problems, the cabinet will be prone to many big problems such as
1- The connection to the upper level device is lost through the RS485 port.
2- Failed to manage the power system and charge and discharge storage batteries.
3- Failed to monitor door condition and temperature of storage batteries.
4- Failed to monitor power distribution and report alarms.
Steps Configure PMU (APM 30).
1- Add PMU (ADD PMU) : Use this command to add a Power Monitoring Unit (PMU). When the PMU is added, a PMU subrack and a PMU board are added at the same time.
Before adding the PMU, run the ADD CABINET command to add a cabinet for the PMU, and run the ADD SUBRACK command to add a subrack for the manager.
Manager Cabinet No : Meaning: Indicates the cabinet number of the manager. The manager of the PMU is usually a BBU or RRU.
Power System Type : Meaning: Indicates the type of the power system for the PMU. GUI Value Range: APM100(APM 100), APM200(APM 200), APM30(APM 30), EPS4890(EPS4890), EPS4815(EPS4815), SC48200(SC48200), EPS48200(EPS48200), TP48300A(TP48300A), ETP(ETP).
Manager Subrack No : Meaning: Indicates the subrack number of the manager. The manager of the PMU is usually a BBU or RRU.
Manager Port No : Meaning: Indicates the number of the serial port where the PMU is connected.
The screenshot below shows the pmu after successfully configure
Thanks,
