21
Anti-lightning, Anti-surge
This product is air discharge and lightning protected with TVS tube technology, which can
effectively prevent transient lightning below 3000 volts, surge and damages caused by other
types of pulse signals.
However, necessary protective measures should be made on the premise of ensuring
electrical safety for outdoor installation according to the situation :
·Signal transmission line must be at least 50 meters away from any high-voltage
equipment or high voltage cables.
· Overhead wiring is absolutely prohibited.
· In strong thunderstorm areas or areas with high induced voltage (such as high voltage
substations), installation of additional high power lightning protection equipment and lightning
rod is essential.
· 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.
· Grounding device must meet dual requirements of anti-interference and electrical safety,
and should not be shorted or mixed with the adjacent lines in a power grid. When system is
independently grounded, grounding impedance should be less than 4Ω, and cross-sectional
area of grounding conductors must be not less than 25m
2
.
Fig 25
