The lightening protection device, the structural cylinder which possesses lightening protection function and the lightning surge electric current by

摘要

A lightning arrestor (1) for flowing the thunder surge current due to lightning strike (7) to the ground comprises a steel pipe (3), a conductor (4) coaxially disposed in the steel pipe (3), an a filler (10) placed between the steel pipe (3) and the conductor (4) and having a conductivity. With this, the thunder surge current flowing through the lightning arrestor (1) is divided. The low-frequency component flows through the conductor (4), and the high-frequency component flows through the steel pipe (3) outside the conductor (4) and the filler (10).