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3.5.3 Connect Ground Cable
3.5.3.1
eNB Grounding
Prepare the grounding cable according to the actual measurements and requirements of
the specific installation site. The eNB has two grounding screws located on the bottom of
the unit, as shown in Figure 3-2. Follow the steps below the figure to connect the ground
cable.
Figure 3-2 eNB Grounding
1. Unscrew one grounding screw, connect one end of the ground cable to the
grounding screw, and fasten it again.
2. Once the eNB is installed at the outdoor location, the other end of the ground cable
needs to connect to a good grounding point.
3.5.3.2
Pole Grounding
The purpose of the pole grounding is to protect the equipment in the station from the
damage of lightning overvoltage as far as possible. However, the interfaces between the
eNB and the outside world mainly include power system, grounding system, antenna
feeder and lightning receiving device, and signal line. Therefore, the damage caused by
lightning mainly comes from the voltage difference between the equipment in the eNB
and one or more of the four interfaces. The pole grounding is shown in Figure 3-3.
