LT Security PTZ217X12 User Manual - Manual (Page 46)

User Manual of 4-inch High Speed Dome
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Appendix
Appendix 1 Lightning & Surge Protection
This product adopts TVS plate lightning protection technology to avoid damage caused by pulse
signal that is below 3000W, like instantaneous lighting, surging, etc. According to the actual
situation outdoors, necessary protection measures must be taken to secure the electrical safety.
 The distance between signal transmission line and High-voltage equipment or high-voltage cable
is at least 50m.
 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, and the steel-pipe
should be one-point grounding. Overhead routing method is forbidden.
 In strong thunderstorm area or high induction voltage areas (such as high-voltage transformer
substation), high power lightning protection apparatus and lightning conductor are necessary to
be appended.
 The design for installation and wiring with lightning protection and grounding in mind should be
combined with the lightning protection consideration of the building, and conform to the
related national standards and industry standards.
 The system should be equipotentially grounded, and the grounding equipment must satisfy
double-request of system anti-jamming and electric safety, and it must not appear short circuit
and open circuit with the zero conductor of strong grid. When the system is grounding individual,
the resistance should be no more than 4Ω, the section al area of the grounding cable should be
no less than 25mm2. For grounding instructions, please refer to the Installation Manual of Speed
Dome.
Figure A- 1 Lightning & Surge Protection