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Lightning damage pathways to equipment
Lightning consists of high-energy low-frequency components and high-permeability high-frequency components. Its two main forms, one is through the metal pipeline or ground directly conduct lightning damage to equipment (direct lightning); one is through the lightning channel and flood channel will be coupled with lightning electromagnetic pulse induction to the metal pipeline or ground surge damage equipment (induction lightning / surge). The vast majority of lightning damage is caused by this induction. For electronic information equipment, the main hazard comes from the lightning-induced lightning electromagnetic pulse coupled energy through the circuit channel to produce transient surges.