Project Description
Remote Radio Unit (RRU) power cable's are generally installed in towers and are controlled by a controller placed inside a closed shelter on the ground near the tower. The connection between the RRU and controller is generally optical and RRU cable is a - 48V DC shielded cable. It feeds - 48V DC power to an RRU . The length of power supply that an RRU power cable supports is 100 m (328.08 ft) by default.
The maximum length of power supply that an RRU power cable supports is 150 m (492.12 ft). Contact Huawei engineers when an RRU power cable greater than 100 m (328.08 ft) is required.
If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 15 A to 30 A.
RRU Functons
- Acts as a transceiver: transmit and receive the user signals to the base station and vice-versa.
- Provides back to back support and connectivity between user equipment's like power, delay,etc.
- Control and process the EM signals received from the Antenna via Jumper(Hollow Guide).
Properties
- Specifications: SANS 1574
- Voltage ratings: 600/1000Volts
- Spark test voltage]Voltage Withstand Test: 6000 volts (rms) on cores
- Conductor: SANS 1411 Part 1 Class 5 annealed copper
- Temperature range: - 10°C to 70°C
- Insulation: General purpose PVC colour as below
- Sheathing: Black fire retardant PVC
- Maximum operating temp: 70°C
- Capacitance mutual (cores/core): 65.6Pf/m
A tool-less female connector (pressfit type) needs to be added to one end of the RRU power cable and a corresponding terminal needs to be added to the other end based on the requirements of the connector on the external power device, as shown in Figure 1.
Figure 1 specifications of an RRU power cable
| RRU Type |
National Standard |
Remote Distance |
Cross-Sectional Area of the Cable |
OCB Quantity |
| RRU3824 or RRU3826 |
European standard |
0m to 100m |
4mm2 |
0 |
| American standard |
0m to 100m |
3.3mm2 |
0 |
Figure 2 Lists the wire colors of an RRU power cable.
| Cable |
Wire |
Wire Color in Most Regions |
Wire Color in Other Regions |
| North American Standard |
European Standard |
UK |
China |
| RRU power cable |
RTN(+) |
Black |
Brown |
Blue |
Red |
| NEG(-) |
Blue |
Blue |
Gray |
Blue |
Audited Supplier 
){kind=link}
){kind=link}