On Lightning Protection Working _3225 wireless com

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On the work of wireless communications Lightning Protection

[Paper Keywords] lightning protection and grounding method for wireless communications [Abstract] frequent thunderstorm season, lightning stations for wireless communications is an important task, do a good job working in the wireless communication system grounding lightning protection lightning protection equipment, has an important significance. Wireless communication system for the most basic ground work, analysis and communication of mine, to reduce communication failure factors of aircraft accident. Wireless communication systems with more advanced automation equipment, precision equipment, integrated circuits increasing. Lightning and the lightning induced electromagnetic pulse is very easy to damage the invasion of the corresponding electronic, electrical facilities, coupled with its own wireless communications equipment and cable feeders and other outdoor antenna exposed, the induction significantly increased lightning damage, lightning alone can not meet the wireless Communication Station equipment the actual needs of the mine, so the system work and protected places more stringent requirements, you must start from the details, from the source control, all-round started, the work of a good job on the basis of system grounding, Taiwan implementation of integrated lightning protection engineering station equipment. Lightning protection to the equipment to careful planning, design, construction, equipment grounding must be strict, high priority, be sure to make the system off the ground: the connection solid, reliable ground network, the discharge flow, in general, in a work area, as far as possible the adjacent room, tower, antenna, transformer, power distribution cabinet, communication cables and consider, according to the grading, and other potential in principle to work to protect the land and mine to form a joint grounding grid, Taiwan various types of ground wire from the station ground pool line or ground line were introduced,[link widoczny dla zalogowanych], expanding the scope to network, enhance the overall mine capacity. A wireless communication anti-mine the ground directly work directly for the anti-mine attacks, we generally use the main lightning rod, lightning protection zone, nets and other traditional lightning protection lightning protection devices, as long as the design, installation and reasonable These lightning protection can be effective to direct the defense mine, this method is economic, simple, but important to note that the lightning rod tip should be located a few meters above the antenna, there should be a lightning rod and the interval between the antenna in order to prevent the presence of lightning damage to the antenna radiation patterns of communication effects. The general practice is the lightning rod as the main rod antenna tower and communications antennas mounted on the rod outside the perimeter of about 1.5 wavelengths. As the intensity of a lightning rod with a larger exposure to lightning, the wider, we must first ensure that it has a good release channel current diarrhea, the main ground criteria should be: 1, the DC ground lightning protection requirements of sufficiently low resistance path, generally 10-500, less than 50 the best, because lightning surge current is high, wide and short duration of the spectrum, it requires the existence of the inductance as small as possible. 2, can not use flat braided ground wire or stranded wire, because the large inductance is not conducive to discharge the lightning current, and to corrosion. More than 3mm to the extent possible using solid wire, and preferably the same metal material. 3, to increase the discharge to surface area, laying a certain interval can be used multiple grounding, and the mutual welding. If the building around 1 to 2 meters buried intervals of about 10 brass, and welded them together. Grounding should be hot galvanized steel, and its specifications are as follows: φ50mm pipe wall thickness of not less than 3.5mm. Angle of not less than 50mm × 500mm × 5mm. Flat steel of not less than 40mm × 4mm. But because of the wireless communication stations, different environmental conditions, the ground network is often difficult to form a closed ring around the house along the ground network, so the composition of the ground network to give a flexible consideration, but the engine room work, the protection of land, Tower mine in the three should work together to network, and connectivity requirements of tower and building (including ground floor, roof), there are difficulties, but also to ensure that the roof of the towers with lightning ground network connectivity. For suburban, multi-mined areas (more than 20 days of thunderstorm days or more) or building higher and not the protection of nearby buildings and mine facilities, stations, and its ground network to be in the ground, multi-point ground (two more) welding connectivity, in particular, note that when connected to the ground mesh welding operation with the device disconnected in order to ensure system security.

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