Description

The Indelec S6.60 when lightning strikes, an electrical field is always created at ground level and this increases in intensity as the downward leader approaches.

Once this reaches a certain level – between 50 and 100 kV/m – the Corona effect, which develops naturally at the top of any high structure, allows discharges – known as upward leaders – to rise toward the cloud (see previous section on the lightning phenomenon).

The position of the ionized path which will allow the lightning current to pass is determined by where the upward leader comes into contact with the first downward leader from the cloud.