避雷器

避雷器是一种用于輸電系統和电信系统的装置，用于保护系统的絕緣體和電導體免受闪电的损害。一般避雷器有一个高壓電端和一个接地端。当雷电浪涌沿架空電纜传播到避雷器时，浪涌电流会被分流，在大多数情况下会导入大地。

参考文献
"[https://books.google.com/books?id=7igDAAAAMBAJ&pg=PT17 Electrical Devices and How They Work, Part 14: Lightning Arresters]" (article about lightning arresters and how they were used in early AC and DC power distribution systems), Popular Science* monthly, February 1919, 5 unnumbered pages, scanned by Google Books
*[http://www.osha.gov/SLTC/etools/electric_power/illustrated_glossary/substation_equipment/lightning_arresters.html OSHA Electric Power eTool: Illustrated Glossary: Lightning Arresters]
*[http://www.arresterworks.com/resources/dictionary.php An extensive dictionary of terms used with arresters at ArresterWorks.com ]
*[http://www.arresterworks.com/history/pdf_files/History_of_Arresters_on_Power_Systems_1890-1930.pdf History of arresters at ArresterWorks.com ]
*[http://www.arresterworks.com/ArresterFacts_files/ArresterFacts%20009%20What%20is%20an%20Arrester%20R3.pdf Graphic Overview of how an arrester works]
*[http://www.nemasurge.com NEMA Surge Protection Institute]