3.1.1dielectric breakdown voltage （electric breakdown voltage）, n—the potential difference at which dielectric failureoccurs under prescribed conditions in an electrical insulatingmaterial located between two electrodes. （See also Appendix X1.）
188.8.131.52 Discussion—The term dielectric breakdown voltage is sometimes shortened to “breakdown voltage.”
3.1.2dielectric failure （under test）, n—an event that is evidenced by an increase in conductance in the dielectric under test limiting the electric field that can be sustained.
3.1.3dielectric strength, n—the voltage gradient at which dielectric failure of the insulating material occurs under specific conditions of test.
3.1.4 electric strength, n—see dielectric strength.
184.108.40.206 Discussion—Internationally, “electric strength” is used almost universally.
3.1.5flashover, n—a disruptive electrical discharge at the surface of electrical insulation or in the surrounding medium, which may or may not cause permanent damage to the insulation.
3.1.6 For definitions of other terms relating to solid insulating materials, refer to Terminology D1711.