抄録
The air-termination system and the earth-termination system are principal components of an external lightning protection system connected by a down-conductor system, though they are physically quite different and are usually discussed independently. The physics of the air-termination system is less understood than that of grounding, and, as a result, various so-called nonconventional external lightning protection systems have been sold world-widely. In this article, the function of a conventional system is reviewed and performance of nonconventional systems is discussed.
