How Grounds Affect the Peak Voltage Due to Lightning

Feb. 10 | 1:10 pm - 1:25 pm

If we look at IEC 61312-1 [1], we might assume that the waveshapes of the current flowing in the grounding system and that flowing in the electrical circuit are the same – implying that the grounding system is simply a resistance. But is that really the case? Observations by Rakov and others suggests that contrary to IEC expectations, the ground rods have an impedance. This session shows how ground rod impedance can affect the peak voltage that a lightning strike can cause.

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