Siemens Siprotec 5 7SS85 - Page 45

3I0 measured via I4
23
, method of measurement = RMS value
(33 % harmonics, in relation to fundamental component)
Up to 30th harmonic 1 % of the setting value or 5 mA (I
rated
= 1 A)
or 25 mA (I
rated
= 5 A), (f
rated
± 10 %)
Up to 50th harmonic, f
rated
= 50 Hz 3 % of the setting value or 20 mA (I
rated
= 1 A)
or 100 mA (I
rated
= 5 A), (f
rated
± 10 %)
Up to 50th harmonic, f
rated
= 60 Hz 4 % of the setting value or 20 mA (I
rated
= 1 A)
or 100 mA (I
rated
= 5 A), (f
rated
± 10 %)
Time delays 1 % of the setting value or 10 ms
Influencing Variables for Thresholds
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
< 5 %
23
Slightly expanded tolerances will occur during the calculation of 3I0, maximum factor of 2
Technical Data
11.17 Stage with Definite-Time Characteristic Curve
SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual 589
C53000-G5040-C019-6, Edition 06.2016