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? Is a surge protection device still functional after an overvoltage? Does the surge protection also exist when the switch of the power strip is not switched on? What is the reason that the glow lamp of the function control lamp of my power strip lights up red or orange? What does 13,500A / 19,500A / 60,000A etc. mean for surge protection devices?