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Reliability of a surge protection device depends on the health of its protecting elements. Metal oxide Varistors (MOVs) are widely used in electric appliances and power distribution systems. They are known to degrade over time when they experience high-surges and long-duration transients. In this paper, more than 120 MOVs are subjected to nominal 8/20 μs unipolar and bipolar surges of 40 kA in different...
Metal Oxide Varistors (MOVs) are widely used in power distribution networks and electric loads and appliances in order to protect against lightning surges and transients overvoltages. Degradation and failure of the MOVs due to lightning surges are one of the concerns of surge protection designers that usually lead to overdesigned or ineffective surge protection. In this paper, more than 100 low voltage...
Metal Oxide Varistors (MOVs) are widely used surge protective components in electronics, and their reliability is important in reliability of the whole system. In this paper, Energy Absorption Capability (EAC) of low voltage MOVs is characterized and measured by experimental tests in a UL-certified lab. It is demonstrated that EAC curve for the low voltage MOV is different than that of high voltage...
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