Lightning and surges
In this chapter, focus is on lightning strikes to ground, i.e., the electrical discharges between the thunder cloud and the ground. Special attention to ground structures, such as buildings and electrical networks will be considered. Lightning strikes can affect electrical circuits in two ways: by direct strikes and by induced effects due to the electromagnetic fields generated by the high magnitude fast lightning current. Following lightning strikes, high current and high-voltage surges travel on electrical networks on both low-voltage (LV) and high-voltage systems. If and when these travelling surges reach sensitive electrical and/or electronic equipment, significant damage can occur if no adequate lightning protection or shielding is put in place. For completeness, switching surges on networks will be reviewed and their impact on the network will be addressed.
Lightning and surges, Page 1 of 2
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