How do overvoltages occur? July 02, 2024 08:47 Updated The following link explains how overvoltages occur: https://www.brennenstuhl.co.uk/en-GB/selection-of-themes/overvoltage-protection/what-is-overvoltage-protection-and-why-is-it-so-important Related articles What does it mean when the control indicator on surge protection socket strips is off? What does 13,500A / 19,500A / 60,000A etc. mean for surge protection devices? Does the surge protection also exist when the switch of the power strip is not switched on? Why is the indicator light on the function control light or switch of my power strip glowing red, yellow, or orange? Is a surge protection device still functional after an overvoltage?