Siemens SIPROTEC 5 Technical Data Manual page 45

Technical Data
11.9 Overcurrent Protection, Ground
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Figure 11-12
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
3I0 measured via I4
fundamental component
3I0 measured via I4
(33 % harmonics, in relation 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
55 Insignificantly increased tolerances will occur during the calculation of 3I0, maximum factor of 2
56 Insignificantly increased tolerances will occur during the calculation of 3I0, maximum factor of 2
1140
Operate Curves and Dropout Characteristic Curves According to ANSI/IEEE
rated
55 , method of measurement =
56 , method of measurement = RMS value
= 50 Hz
rated
= 60 Hz
rated
According to specified tolerances
Slightly expanded tolerances
Active
1 % of the setting value or 5 mA (I
or 25 mA (I = 5 A), (f
rated 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
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)
= 1 A)
rated
± 10 %)