Dropout time Approx. 50 ms or better
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 ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Inactive
Tolerances
Negative-sequence current I
2
Approx. 3 % of setting value or 0.030 A at I
rated
= 1 A
Approx. 3 % of setting value or 0.150 A at I
rated
= 5 A
Warning delay 1 % of the setting value or 10 ms
Time for 2 ≤ I
2
/I
2Perm
≤ 20 5 % of reference (calculated) value or 100 ms ±
(1 % current tolerance or 10 mA) at I
rated
= 1 A
5 % of reference (calculated) value or 100 ms ±
(1 % current tolerance or 50 mA) at I
rated
= 5 A
Influencing Variables for the Thresholds
Harmonics
– Up to 10 % 3rd harmonic
– Up to 10 % 5th harmonic
≤ 1 %
≤ 1 %
Technical Data
12.24 Unbalanced-Load Protection
SIPROTEC 5, Overcurrent Protection, Manual 1499
C53000-G5040-C017-8, Edition 07.2017
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