HD-TVI Speed Dome DS-2AE7232TI-A User Manual
UM THD DS-2AE7232T-x 020519NA 41
4 Appendix
Appendix 1 Lightning and Surge Protection
This product adopts TVS plate lightning protection technology to avoid damage caused by a pulse signal
that is below 3000 W, like instantaneous lighting stroke, surging, etc. According to the actual outdoor
situation, necessary protection measures must be taken, besides ensuring electrical safety.
• The distance between signal transmission wires and high-voltage equipment or high-voltage cable
should be at least 50 m.
• Outdoor wiring should be routed under eaves as much as possible.
• In open fields, 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 or high induction voltage areas (such as high-voltage transformer substation),
high power lightning protection apparatus and lightning conductor are necessary.
• Lightning protection and outdoor device grounding and cables should be considered together with the
lightning protection demand of building designs. It also must conform to the related national standards
and industrial standards.
• The system should be equipotential grounded. The grounding equipment must conform to the demands
of both system anti-jamming and electrical safety and it must not appear short circuit or mixed circuit
with the zero conductor of strong grid. When the system is grounded alone, the resistance should be
no more than 4Ω. The sectional area of the grounding cable should be no less than 25 mm
2
. For
grounding instructions, please refer to the Speed Dome Installation Manual.
Figure 25, Lightning and Surge Protection
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