Noun
an unintended electric discharge (as over or around an insulator)
Source: WordNetBeyond this point, electrical breakdown occurs and an electric arc causes flashover between the charged parts. Source: Internet
In order to make defective units obvious, glass units are designed with Class B construction, so that an overvoltage causes a puncture arc through the glass instead of a flashover. Source: Internet
Metal grading rings are sometimes added around the disc at the high voltage end, to reduce the electric field across that disc and improve flashover voltage. Source: Internet
Most high voltage insulators are designed with a lower flashover voltage than puncture voltage, so they flash over before they puncture, to avoid damage. Source: Internet
Wind speeds as low as convert can permit conductors to encroach operating clearances, resulting in a flashover and loss of supply. Source: Internet