避雷針的原理及結構一問?

避雷針置於大廈頂端
防止大廈被雷電擊中

原理：
當雷電接觸到避雷針，避雷針就會吸收雷電，把雷電引到地底並不損傷建築物。

結構圖：

圖片參考：http://imgcld.yimg.com/8/n/HA00379593/o/701003170126813873366050.jpg

避雷針 as a low-resistance conductor which is very low and lead the lighting current from the atmosphere to the earth,
you can imagine that is a earthed wire conduct from the top of the building and stick in ground as earthed.

避雷針（也稱為閃電 preventors或閃電避雷器）構造一個高導電材料具有高電流處理性能。它們連接到地面。

避雷針工作的身體位於通常高於周圍結構物提供一個更有利的低阻抗路徑，地面大氣“靜電”收費。因此，提供了一種替代的周圍結構成為放電到地的路徑。

你可以參考圖刊載於 floowing聯繫的structire的避雷針：



http://media-2.web.britannica.com/eb-media/30/24030-004-1AD92E9F.gif

http://www.elliottelectric.com/References/Residential_Lightning_Protection.aspx

Lightning rods (also called lightning preventors or lightning arrestors) are constructed of a high-conductivity material with high current-handling properties. They are connected to ground.

Lightning rods work by being physically located usually higher than surrounding stuctures to offer a more conducive low-resistance path to ground for atmospheric "static electricity" charges. Thus provides an alternative to surrounding structures becoming the discharge path to ground.

You could refer to the diagrams given in the floowing links for the structire of lightning rods:

http://media-2.web.britannica.com/eb-media/30/24030-004-1AD92E9F.gif

http://www.elliottelectric.com/References/Residential_Lightning_Protection.aspx


2010-03-20 23:25:06 補充：
There are some typos in the last sentence. "floowing" should be "following", and "structire" should be "structure".