Issue V1.0 (2015-09-30)
21
IR Network High Speed Dome
User Manual
A Lightning Proof and Surge Signal Proof
A
Lightning Proof and Surge Signal Proof
The product adopts TVS lightning proof technology to prevent damage by
lightning strike below 1500 W and impulse signals such as surges; however, 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.
!
Install outdoor cable lays under eaves as much as possible.
!
In open areas, shield cables in steel tubing and conduct a single point ground to
the tube. Trolley wire is forbidden in such circumstances.
!
In strong thunderstorms or high faradic zones (such as a high voltage
transformer substation), extra strength 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 be
short connected with high voltage electricity net. When the system is grounded
separately, the resistance of down conductor should be
≤
4
Ω
and the sectional area
of down conductor should be
≤
25mm
2
(refer to Figure E.1).