Zkteco PL-52A12G — руководство пользователя по защите от молний и перенапряжений [52/55]

44 2.4 Inch TFT POE Terminal User Manual

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 3000V, 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 lay 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 be equipotent grounding. 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 25m

Fig 25