Section 3 (Figure 7.71): Explosion
If the energy of the lightning impulse current is so high as be much higher than the pre-arcing of the fuse, then the fuse strip can vaporize explosively. This will result in bursting the fuse box. Apart from the mechanical consequences, it must be noted that the lightning impulse current continues to flow through the bursting fuse in the form of an electric arc; the lightning impulse current can thus not be inter- rupted nor can the required impulse current carrying capability of the employed arrester be reduced.