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the aftereffect of multiple impulse voltages around the electrical and physical qualities of
the zinc (ZnO) varistor. To research the dynamic qualities of the ZnO varistor exposed to
multiple impulse voltages, we designed and fabricated the multiple combination wave generator. The multiple combination wave generator can establish quintuple 1.2/50 ìs impulse voltages
of 100 kV and quintuple 8/20 ìs impulse
power of 12 kA. Using these voltages and power, the electrical and physical qualities from
the ZnO varistor were evaluated. The multiple impulse failures of the ZnO varistor mostly are brought on by the top flashover. When multiple impulse voltages are injected, the charge enhancement close
to the became a member of edges of the ZnO varistor and metal electrodes plays a decisive role at first
glance flashover or breakdown initiation and developments. Also, following
the injection from the quintuple 8/20 ìs impulse
power of 10 kA, the rest of the current and quiescent current from the ZnO blocks were altered markedly.
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