Stability Limits of a Protection System : The r.m.s. value of the symmetrical component of the through fault current up to which the protection system remains stable
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}