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Technical Data
12.9 Directional Overcurrent Protection, Ground
Frequency Operating Range
0.9 ≤ f/f
≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f
< f ≤ 90 Hz
rated
f < 10 Hz
f > 90 Hz
Tolerances
Currents, method of measurement = fundamental
component
Currents, method of measurement = RMS value
(33 % part of harmonic, referring to fundamental component)
Up to 30th harmonic
Up to 50th harmonic, f
Up to 50th harmonic, f
Operate time for 2 ≤ I/I threshold value ≤ 20
Dropout time for I/I threshold value ≤ 0.90
Direction-determination angle error
Influencing Variables for Thresholds
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
832
rated
= 50 Hz
rated
= 60 Hz
rated
According to specified tolerances
Slightly expanded tolerances
Active with reduced sensitivity
1 % of the setting value or 5 mA (I
or 25 mA (I
= 5 A)
rated
1 % of the setting value or 5 mA (I
or 25 mA (I
= 5 A), (f
rated
rated
3 % of the setting value or 20 mA (I
or 100 mA (I
= 5 A), (f
rated
rated
4 % of the setting value or 20 mA (I
or 100 mA (I
= 5 A), (f
rated
rated
5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
1º
< 5 %
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
= 1 A)
rated
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
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