dji Aeroscope AS-F1800 Посібник користувача - Сторінка 10
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Installation
Lightning Protection
The Aeroscope stationary unit system includes surge protection modules in the antenna
module, power module, and Ethernet port. Aeroscope does not include a lightning induction
system, and should be installed within the protected region of another lightning induction
system. The protected region is calculated using the rolling sphere method.
The rolling sphere method assumes that an imaginary sphere of radius h
surface of a substation. The sphere rolls up and over (and is supported by) lightning masts,
shield wires, substation fences, and other grounded metallic objects that can provide
lightning shielding. A piece of equipment is said to be protected from a direct stroke if it
remains fully within the surface of the sphere.
For a simple scenario in which there is only one lightning rod standing on a flat surface, the
maximum distance that the Aeroscope can be placed from the lightning rod and remain
within the protected region is calculated by the following equation:
R
=√(h(2h
-h))-√(h
x
r
x
Where:
r
is the maximum distance the Aerescope can be placed from the lightning rod.
x
h
is the height of the protected object.
x
h is the height of the lightning rod.
h
is the rolling sphere radius. It depends on the lightning density and the protected matter and
r
is given in the following table in the Chinese standard.
Protection Level
Type 1
Type 2
Type 3
If Aeroscope is not under the protection of the nearest lightning rod, a designated lightning
induction system should be designed by a qualified professional.
Finally, be sure to note the following:
Ensure that rainwater cannot flow along the Antenna cable into the Aeroscope receiver.
If the pole is made of metal, the frame and the pole should be separated using insulation.
Indoor power outlets must have surge protection.
Indoor Ethernet outlets must have surge protection.
Step-by-Step Installation Guide
For permanent setups, the Aeroscope unit can be mounted anywhere that meets all installation
requirements, such as Lightning Protection, height restrictions, power connection, and network
connection. The most common installation scenario is to attach it to a pole on the rooftop.
The standard procedure for pole-mounted scenarios is as follows:
1. The pole should be firmly fixed to the ground (or other solid surface such as a rooftop).
The diameter of the pole plus the insulation layer should be 120 mm to utilize the frames
supplied with the stationary unit and antennas.
8
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(2h
-h
))
r
x
Rolling Sphere Radius (m)
30
45
60
exists above the
r