A lightning arrestor is installed to protect against over ______.

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Multiple Choice

A lightning arrestor is installed to protect against over ______.

Lightning arrestors are meant to keep equipment safe from transient overvoltages—brief but high increases in voltage that can occur from lightning or switching events. When a surge happens, the arrestor quickly conducts and diverts the excess voltage to ground, so the voltage seen by downstream equipment stays within tolerable limits. That’s why the best choice is voltage surges. It doesn’t primarily address current surges, which are spikes in current, nor does it target power surges, which involve higher power flow; the protective action is about keeping voltage levels from rising high enough to damage insulation. In short, it limits the voltage that reaches equipment during transient events.

Lightning arrestors are meant to keep equipment safe from transient overvoltages—brief but high increases in voltage that can occur from lightning or switching events. When a surge happens, the arrestor quickly conducts and diverts the excess voltage to ground, so the voltage seen by downstream equipment stays within tolerable limits. That’s why the best choice is voltage surges. It doesn’t primarily address current surges, which are spikes in current, nor does it target power surges, which involve higher power flow; the protective action is about keeping voltage levels from rising high enough to damage insulation. In short, it limits the voltage that reaches equipment during transient events.

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