Surge protector
lastmod 2020-06-23created 2020-06-231 edits
A surge protector is a device that prevents damage to power equipment from lightning impulse voltages.
About
A device used to control transient overvoltage, used to protect power equipment from lightning, ground faults, and KEPCO (Korea Electric Power Corporation). The "Surge" in the name is a power engineering term translated as transient overvoltage; the device protects circuits from burning out, failing, or malfunctioning when an incoming transient overvoltage exceeds the circuit's design voltage. It used to be used in large-scale power facilities, but as distribution facilities have become more advanced in many senses, cases of transient overvoltage entering homes have increased sharply, and it is now a general-purpose device that is not uncommonly installed in homes. In countries with unstable power quality, it is a fairly common device, to the point that some homes attach one to each electronic appliance. In such countries, not having one is a big problem, because voltage spikes frequently fry electronics outright. In fact, travel accounts from remote areas often include stories of local households where a TV, computer, karaoke machine, etc. bought at great expense sit broken and abandoned. Electronics that meet the relevant standards sometimes have built-in surge protection components for basic protection. Long-lived white goods often have one or two attached to the power input circuit. This is because sudden voltage changes occasionally occur for reasons other than lightning.
Simply put: it is the case where, due to lightning or other causes, an abnormal waveform with a voltage above 220 V and the accompanying high energy momentarily enters the 220 V 60 Hz AC supplied to homes. When appliances break after a lightning strike, it is because lightning struck near a utility pole and its energy was induced into power lines or communication lines. In general, whether urban or not, surge energy enters homes more through communication lines such as telephone lines and coaxial cables than through power lines.