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? Is a surge protection device still functional after an overvoltage? What is the reason that the glow lamp of the function control lamp of my power strip lights up red or orange?