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In low-voltage (LV) electrical networks metal-oxide varistor (MOV) surge arresters connected in parallel are often used against overvoltages. The paper presents the results of laboratory experiments, during which pairs of parallel connected MOV surge arresters were subjected to surges of specified energy. The tests determined energy distribution between surge arresters for AC burst voltage stresses,...
The most efficient surge-arresters in use today are based on ZnO varistors. All electronic devices and power lines are using varistors in order to protect extremely sensitive devices and consumers against any type of overvoltage, mainly lightning strokes or induced overvoltages, both on power supply lines as well as on data lines. The heat produced inside the varistor is basically incontrollable,...
Zinc oxide (ZnO) surge arresters with series gap are equipped to protect the electricity failure for power distribution systems. Although the ZnO surge arresters might have enough performances to protect the electricity failure when they were installed, the performance may decrease with the increase of the number of operation times and the time elapsed after the installation. The aim of this study...
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