Appendix
Ⅰ
Anti-lightning, Anti-surge
This product is extremely air discharge and lightning protection with TVS tube technology,
which can effectively prevent the transient lightning below voltage 6000V, surge and
damages caused by other types of pulse signals.
However, necessary protective measures should be made in the premise of ensuring
electrical safety for outdoor installation according to the actual situation :
Signal transmission line must be at least 50 meters far away from the high-voltage
equipment or high voltage cable.
Try to choose outdoor wiring laid down along the roof line.
Way of sealed steel pipe buried wiring is used in the area which opened, and steel
pipe units grounded in one point. Overhead wiring is absolutely prohibited.
In the strong thunderstorms area or areas with high induced voltage (such as high
voltage substations), measure of installation of additional high power lightning
protection equipment and lightning rod must be taken.
Lightning protection and grounding of outdoor devices and lines must take the
lightning-protection requirements of buildings into consideration, and comply with the
related national standards and industry standards.
System must have proper ground protection. Grounding device must meet dual
requirements of anti-interference and electrical safety, and should not be shorted or
mixed with the adjacent lines in the strong power grid. When system is independently
grounded, grounding impedance should be less than 4Ω, and cross-sectional area of
grounding conductor must be not less than 25mm
2
.
Fig 1
