With the evolution of equipment for protection and control, mainly in the 80s, the first equipment that used the concepts of traveling waves for selectivity and protection began to appear on the market in static relays where the actuation times became less than 5 ms, reaching 2 ms, something by that time impossible using conventional techniques. Furthermore, in the same decade the first traveling wave fault locators appeared, where accuracies in fault locations of hundreds of meters were achieved without significant influence of the length of the transmission lines or electrical parameters, such as reactive compensation
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