3.3.3.2 Nearby lightning strikes

For nearby lightning strikes with magnetic effects we have (Equation 3.3.3.2.1):

[equation](3.3.3.2.1)

The area A_M (Equation 3.3.3.2.2) is obtained by drawing a line around the structure at a distance r_m (Equation 3.3.3.2.3), which depends on the impulse withstand voltage of the connected devices and systems U_W (Figure 3.3.3.2.1):

[equation](3.3.3.2.2)

[equation](3.3.3.2.3)

Lightning strikes to the area A_M magnetically induce surges in installation loops inside the structure.