Quick Start Guide
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Appendix Table 1-1
Installing lightning protection devices outdoors
No.
Description
1
Video lightning conductor.
2
Communication lightning conductor.
3
Power supply lightning conductor.
4
Steel tube.
5
Explosion-proof camera: Must be installed in the arc formed by the 60-m circle, the
lightning conductor top and the ground.
6
Impedance of the cable connected to the grounding wire should be less than 4Ω.
7
Lightning conductor.
8
The radius is 60 m.
Appendix Figure 1-2
Installing lightning protection devices outdoors (2)
R: The radius of the circle, and R=60 m.
L1: The length of the pole that holds the lightning conductor.
L2: The length of the rail that holds the Camera.
H: The length of the lightning conductor.
To get the value of L1, you need to use the formula:
��𝑅𝑅
2
– [R– (L1 + H)]
2
– L2
�
2
+ (R– L1)
2
= R²