Learning path
From lightning concepts to low-voltage power-line SPD products—a structured guide for engineers, panel builders, and local partners.
14. Lead Length, Loop Area & Inductance · Page 1 of 5
V = L di/dt in plain installation language.
Surge currents change extremely quickly. Even small inductance creates large voltage.
The inductive drop on the connecting leads adds to the SPD's residual voltage at the busbars feeding equipment.
A great Up on paper can become a poor installed Up with long leads.
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