The main function of the 7SA6 is a nonswitched
distance protection. By parallel
calculation and monitoring of all six
impedance loops, a high degree of
sensitivity and selectivity is achieved
for all types of fault. The shortest
tripping time is less than one cycle. All
methods of neutral-point connection
(resonant grounding, isolated, solid or
low-resistance grounding) are reliably
dealt with. Single-pole and three-pole
tripping is possible. Overhead lines can be
equipped with or without series capacitor
compensation.