Siemens Siprotec 5 7SS85 Techical Data page 24

Technical Data
11.5 Circuit-Breaker Failure Protection 3-Pole
Frequency Operating Range
0.9 ≤ f/f ≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f < f ≤ 80 Hz
rated
f < 10 Hz
f > 80 Hz
Tolerances
Threshold values, dropout thresholds
Times
568
rated
According to specified tolerances
Slightly expanded tolerances
Active
2 % of the setting value or 1 % of the rated current
1 % of the setting value or 10 ms
SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual
C53000-G5040-C019-6, Edition 06.2016