Altai Technologies Ltd. All rights reserved
A8n Series Super WiFi Base Station Installation Guide
TPS13-002_rev1.0
ground conductor. The grounding plate is connected to the ground conductor using
a ground cable and clamp.
The A8n series base station grounding terminal is located at the bottom of chassis
compartment. This grounding terminal should be connected to the grounding plate
using a ground cable and lug. AWG 10 (around 5 mm
2
cross-sectional area) copper
wire is recommended for the ground cable. Only one grounding connection to the
pole or tower is allowed.
All antenna ports of A8n base station are grounded internally. For shielded Ethernet
cable (AC model) or shielded POE cable (DC model) grounding, the ground wire of
the Ethernet/ POE cable should be connected to the screw port located at the inside
bottom of lower chassis compartment of A8n series base station. The other side of the
Ethernet/ POE cable will be connected to indoor units via a grounded external
lightning protector box. The external lightning protector box should be located
outside the building as near as practicable to the entrance of the cables to the
building and it is connected to an earth termination via a ground cable.
4)
Earth Termination
An earth termination is a metal grounding bar which is planted into the earth for
conducting and dispersing lightning current from the ground conductor to earth. The
ground conductor is connected to this grounding bar at one end. The mounting post
or tower should have its own grounding bar. The size of metal grounding bar should
be designed such that the total resistance from the lightning rod to the earth
termination is less than 5 ohms.
5)
External Lightning Protectors
Lightning protector (or surge arrestor) is a component which provides a lower
resistance path to conduct sufficient charge from the surge in order to lower the
surge voltage to a safe level.
External lightning protectors can be used to provide additional protection to the Altai
A8n series base station embedded protectors. They can be put at strategic points
such as the Ethernet port, AC power or antenna ports close to the A8n series base
station. External lightning protectors are available in the market in the form of a
protector box, which can be inserted simply in front of the ports to be protected.
As the magnitude and speed of lightning varies in different places, the specifications
of external lightning protectors should be chosen appropriately according to local
protection requirements.
