Siemens SIPROTEC 5 6MU85 - 12.8.2 Stage with Inverse-Time Characteristic Curve

Times
Operate time with time delay = 0 ms
Approx. 37 ms + OOT
52
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), (f
rated
± 10 %)
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), (f
rated
± 10 %)
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), (f
rated
± 10 %)
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), (f
rated
± 10 %)
Time delay 1 % of the setting value or 10 ms
Direction-determination angle error 1 °
Influencing Variables for Thresholds
Transient excess pickup in method of measurement =
fundamental component, for τ > 100 ms (with
complete unbalance)
< 5 %
Stage with Inverse-Time Characteristic Curve
Setting Values
Rotation angle of the reference voltage
-180° to +180° Increments of 1°
Directional mode Forward
Backward
–
Method of measurement Fundamental component
RMS value
–
12.8.2
52
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
Technical Data
12.8 Directional Overcurrent Protection, Phases
826 SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020