Device for protection against lightning and sensing electrode having a virtually end is variable, and corresponding

摘要

The present invention relates to a device for protection against lightning and a corresponding method being applied notably to the lightning arresters comprising a sensing electrode enabling the discharge of the lightning current in the earth. The device comprises a sensing electrode 1 is able to pick up a lightning current and to discharge it into the soil, connected to ground and having a free end, and means for varying 2, 3 of the electrical behavior of this free end adapted to vary at least one electrical characteristic of this free end such that its coefficient of amplification of the local electric field in the vicinity of this free end, these means of the variation being electrically insulated from the sensing electrode.