数学公式计算北京pk10

移动信号塔,铁塔厂,智慧路灯定制厂家,仿真椰子树,广东广信通信设备有限公司,监控立杆厂家,仿真松树,路灯灯杆生产厂家,仿真树生产厂家,路灯厂家,联通信号发射塔,小微基站

Guangxin Communication Consulting Hotline
13676294460 18998313909

广信动态
Home > Guangxin News > FAQs >

Lightning protection measures for communication towers

作者:广信通信 发表时间:2016-01-07 20:49:21 Article Source: Communications tower Author: Guangxin Communications Published: 2016-01-07 20:49:21

     When the base station communication tower exceeds a certain height, the number of lightning strikes increases in proportion to the square of the height of the communication tower, which means that after the communication tower exceeds a certain height, the chance of being struck by lightning will increase significantly.

    )的估算公式为: N=ng(CH+h)2 D × 102 (/) ; 式中: ng —地面落雷密度; C —地形的系数; The estimated formula for the number of lightning strikes ( N ) per year of the communication tower is: N = ng (CH + h) 2 D × 102 ( times / year ) ; where: ng — ground lightning density; C — coefficient of terrain;

    周围是开阔地及山岳不陡取0.2;其它情况下C=0.10.2 。 Among them: C = 0.3 when the communication tower on the top of the mountain is open and the mountain is steep; C = 0.3 when the surrounding area is open and the mountain is not steep ; otherwise, C = 0.10.2 .

通讯塔

    平地上通讯塔C=0 ;其余情况下取0.05 。 Non-top communication towers are surrounded by open ground and when the mountains are not steep, C = 0.1, and communication towers on flat ground, C = 0; otherwise , 0.05 . —通讯塔所在位臵与1公里半径范围的地平面的平均差值( m ); h —通讯塔的高度; D —通讯塔坐落地区的等雷线值。 H — the average difference between the location of the communication tower and the ground plane within a radius of 1 km ( m ); h — the height of the communication tower; D — the value of the isoline of the area where the communication tower is located.

    According to the situation of China's mobile communication base stations, especially in the southern region, lightning strikes on communication towers are one of the three main ways to damage the base station equipment (communication tower antenna feeders, overhead power lines or communication lines). × Therefore, the communication tower should have perfect lightning protection against direct lightning strikes and secondary induction lightning. The lead of the lightning protection zone must conform to the design and relevant specifications. Generally, two lightning rods from the top of the tower are used to lead down to 40 × 4mm Hot-dip galvanized flat steel (minimum intermediate connections, distance from power lines, communication lines, gas pipelines 1.5m Above), and it is fixed and reliable with the tower body, qualified for welding with each other, and the welding place should have reliable anti-corrosion measures, which are reasonable and meet the requirements. Lightning rods on the top of the tower are generally galvanized steel pipes with a pointed top and a height of 7 meters Left and right, should be installed firmly. 度保护范围内。 Make sure that the antenna is within the 45 degree protection range of the lightning rod.

    4个,红色100W ,如果用交流电,其电源线必须为屏蔽线,同时外屏蔽套上下两端应接地。 Obstacle lights for communication towers are generally provided with 2 to 4 red 100W on the top of the tower. If AC power is used, the power cord must be shielded, and the upper and lower ends of the outer shield sleeve should be grounded. Solar cells are now used as energy sources, and corresponding lightning protection measures should also be taken. At the same time, it needs to be handled in accordance with the regulations of the Ministry of National Defense and the Civil Aviation Administration.

    Supervisors should check the installation of lightning rods (nets) and their supporting parts of communication towers. They must be correctly positioned, firm and reliable, and have good anti-corrosion performance. The lightning arrester net has the correct size and bending radius, and the support parts are evenly spaced. The production quality of the lightning rod and its support parts should meet the design requirements, and the designed marking pins and navigation light fixtures should be complete and clearly displayed.

    )可以通过下式计算: R=(1.6h3 × P)/(1+h2/h1) ; 式中: h1----为避雷针的高度(m)h2----为被保护物的高度( m ); h3----为避雷针的有效高度(m)h3=h1-h2 R---为高h2平面的保护半径(m)P---为系数,当h1< To ensure that the antenna is within the effective protection area of the lightning rod, the effective protection range radius ( R ) of the lightning rod can be calculated by the following formula: R = (1.6h3 × P) / (1 + h2 / h1) ; where: h1-- -Is the height of the lightning rod (m) ; h2 ---- is the height of the protected object ( m ); h3 ---- is the effective height of the lightning rod (m) , h3 = h1-h2 R --- is high h2 plane protection radius (m) ; P --- is the coefficient, when h1 < 30m ;当h1> When P = 1 ; when h1> 30m ; 在半径为R的范围内,凡高度不超过h2高度的设备能得到保护。 In the range of radius R , equipment with height not exceeding h2 can be protected.

通讯塔 Article Tags: Communication Tower