A brief but sudden increase in line voltage, often destructive, usually caused by a neraby electrical appliance such as a photocopier or elevator, or when power is reapplied after an outage
A sudden rise of current or voltage in an electrical circuit that can last up to several seconds A power surge can cause damage to a computer or its files if there is no surge protector
A sudden increase or "spike" in line voltage Power surges can damage data and your computer See surge protector