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Reference.org
Overvoltage
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<p>In <a href="/facts/Electrical_engineering/YYXW1KLW">electrical engineering</a>, overvoltage is the raising of <a href="/facts/Voltage/EN2po6N2">voltage</a> beyond the design limit of a <a href="/facts/Electrical_network/zt94kTW0">circuit</a> or <a href="/facts/Circuit_element/CenJ4IkU">circuit element</a>. The conditions may be hazardous. Depending on its duration, the overvoltage event can be <a href="/facts/Transient_(oscillation)/mzrDXMvd">transient</a>—a <a href="/facts/Voltage_spike/XYdAJkje">voltage spike</a>—or permanent, leading to a power surge. </p>