Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 90 Hz
Slightly expanded tolerances
f < 10 Hz
f > 90 Hz
Active with reduced sensitivity
Tolerances
Currents, method of measurement = fundamental
component
1 % of the setting value or 5 mA (I
rated
= 1 A)
or 25 mA (I
rated
= 5 A)
Currents, method of measurement = RMS value
(33 % part of harmonic, referring 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)
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)
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)
Operate time for 2 ≤ I/I threshold value ≤ 20 5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
Dropout time for I/I threshold value ≤ 0.90 5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
Direction-determination angle error 1º
Influencing Variables for Threshold Values
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
< 5 %
Technical Data
11.18 Directional Overcurrent Protection, Ground
SIPROTEC 5, Low-Impedance Busbar Protection, Manual 955
C53000-G5040-C019-C, Edition 04.2021
To Next Page
Loading...
