COP-USA CD55-H-SDI - Manual (Page 26)

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Appendix : Lightning Proof and Surge Signal Proof
The product adopts TVS lightning proof technology to prevent from damage by lightning
strike below 1500 W and impulse signals such as surge; but it is also necessary to abide
by the following precautions to ensure electrical safety based on practical circumstances:
 Keep the communication cables at least 50 meters away from high voltage
equipment or cables.
 Make outdoor cable laying-out under eaves as possible as you can.
 In open area shield cables in steel tube and conduct a single point ground to the tube.
Trolley wire is forbidden in such circumstances.
 In strong thunderstorm or high faradic zone (such as high voltage transformer
substation), extra strong lightning proof equipment must be installed.
 Take the building lightning proof requirements into account to design the lightning
proof and grounding of outdoor equipment and cable laying-out in accordance with
the national and industrial standards.
 The system must be grounded with equal potentials. The earth ground connection
must satisfy the anti-interference and electrical safety requirements and must not
short circuited with high voltage electricity net. When the system is grounded
separately, the resistance of down conductor should be ≤ 4Ω and the sectional area
of down conductor should be ≤25mm2 (refer to Figure I).
<Fig >