Times
Operate time with time delay = 0 ms
Approx. 37 ms + OOT
48
at 50 Hz
Approx. 31 ms + OOT at 60 Hz
Extension of the operate time during operation with
transformer inrush-current detection
Approx. 10 ms
Dropout time, typical Approx. 25 ms + OOT
Dropout time, maximum Approx. 30 ms + OOT
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
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 % 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)
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/threshold value I ≤ 20 5 % of the reference (calculated) value
+2 % current tolerance or 30 ms
Dropout time for I/threshold value I ≤ 0.90 5 % of the reference (calculated) value
+2 % current tolerance or 30 ms
Direction-determination angle error 1°
Influencing Variables for Threshold Values
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
< 5 %
48
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
Technical Data
11.17 Directional Overcurrent Protection, Phases
SIPROTEC 5, Low-Impedance Busbar Protection, Manual 951
C53000-G5040-C019-C, Edition 04.2021
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