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The product adopts TVS lightning proof technology to prevent from damage by lightning strike below 4000V 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:
z
Keep the communication cables at least 50 meters away from high voltage equipment or cables.
z
Make outdoor cable laying-out under eaves as possible as you can.
z
In open area shield cables in steel tube and conduct a single point ground to the tube. Trolley wire is forbidden in such
circumstances.
z
In strong thunderstorm or high faradic zone (such as high voltage transformer substation), extra strong lightning proof
equipment must be installed.
z
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.
z
The system must be grounded with equal potentials.
z
The earth ground connection must satisfy the anti-interference and electrical safety requirements and must not short circuit
with high voltage electricity net. When the system is grounded separately, the impedance of down conductor should be less
than 4 Ohms and the sectional area of down conductor should be greater than 25mm
2
. (Refer to following picture):
Appendix 4: Lightning Proof & Surge Proof
Lighting Rod
45 degrees
Video cable
Lightning Conductor
Communication cable
Lightning Conductor
Power cable
Lightning Conductor
The resistance of
the Down conductor
should be
≤
4 Ohms
Shield Steel tube
The dome must be installed within
the 45 degree angle area under the
lightning rod with the vertical line as
the bisector
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