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APPENDIX B: LIGHTENING AND SURGE PROTECTION
APPENDIX B
Lightning and Surge Protection
This product includes TVS plate lightning protection technology to prevent damage caused by a pulse signal that is below
3000 watts from sources such as lighting, surging, etc. Protection measures must be taken to ensure electrical safety.
The distance between signal transmission line and high-voltage equipment or high-voltage cable is at least 50 m.
•
Outdoor wiring should better be along the eaves as much as possible.
•
In the open field, wiring should be buried underground in sealed steel pipe with one-point grounding. Overhead routing
•
method is not acceptable.
In regions with thunderstorms or where high induction voltage are present (such as high-voltage transformer substation),
•
high power lightning protection apparatus and lightning conductor are necessary.
The design for installation and wiring with lightning protection and grounding should be combined with the lightning
•
protection consideration of the building, and conform to the relevant national and industry standards.
The system should ensure equi-potential grounding. Grounding equipment must satisfy both system anti-jamming and
•
electric safety. It must not allow short circuit and open circuit with the zero conductor of strong grid. When the system is
singularly ground, the resistance must less than 4 Ω and the cross-sectional area of the grounding cable must be no less than
25 mm
. For grounding instructions, refer to local electrical codes and this manual.
2
Video arrester
Communicate arrester
Power arrester
The resistance of
earthing conductor
must be less than 4 Ω.
28
Steel jacket
Lightning & Surge Protection
Lightening rod
45° conical
envelope
The camera should be
within a 45° envelope
under the lightening rod.
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