Dielectric Withstand : The ability of insulating materials and spacing's to withstand specified overvoltage's for a specified time (one minute unless otherwise stated) without flashover or puncture
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}