Base station power distribution box current

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A typical telecom base station DC distribution box (DCDU) operates at -48V DC with a maximum input current of 160A and distributes up to 30A per output port.

Overview of Base Station Power Distribution

Base station power systems include both AC and DC distribution units. The AC distribution panel supplies power to AC loads and rectifiers, while the DC distribution unit (DCDU) provides stable -48V DC power to telecom equipment such as RRUs, BBUs, and EMUs . The DCDU ensures uninterrupted operation by distributing power according to load requirements and includes protection mechanisms like overload, undervoltage, and overheat protection .

Current Ratings and Distribution

Input Voltage: -48V DC
Maximum Input Current: 160A
Output Ports: Typically 10 ports per DCDU
Maximum Output Current per Port: 30A
Load Allocation: Each port is assigned a maximum fuse current to prevent overload and ensure safe operation . This configuration allows the DCDU to support macro, micro, and distributed base stations, providing reliable power to multiple devices simultaneously.

Protection and Monitoring

Base station distribution boxes are equipped with intelligent monitoring systems using protocols like RS485 or SNMP. These systems monitor:

Output overloads: Automatically cut off power and trigger alarms if current exceeds set limits
Input undervoltage: Prevents equipment damage by disconnecting output when input voltage drops
Overheat protection: Activates when temperature exceeds safe thresholds
Remote monitoring: Enables real-time status updates and predictive diagnostics for maintenance

Environmental and Operational Parameters

Operating Temperature: -40°C to +65°C
Relative Humidity: 5% to 100% RH
Altitude: 0–3000 meters (some units up to 4000 meters)
Protection Level: IP55 for outdoor cabinets
Wind Resistance: Up to 67 m/s These specifications ensure that the power distribution box can operate reliably in harsh outdoor environments while maintaining stable current delivery to all connected telecom equipment.

Summary

The base station power distribution box is a critical component that converts and distributes DC power efficiently, with a maximum input current of 160A and 30A per output port, while providing comprehensive protection and monitoring to ensure uninterrupted operation of telecom systems .

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