Directional Time-Overcurrent Protection, Ground
Setting Values for the Function Direction Determination
Method for direction determination Zero sequence
Negative sequence
–
Minimum V0 or V2 threshold 0.150 V to 20.000 V 0.001 V
Rotation angle of the reference voltage -180° to 180° 1°
Forward range 0° to 180° 1°
Setting Values for All Stage Types
Direction mode Forward
Reverse
–
Method of measurement Fundamental component
RMS value
–
Threshold value 1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.030 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.15 A to 8.000 A Increments of 0.001 A
Setting Values for Stage Type Definite Time-Overcurrent Protection
Dropout ratio
0.90 to 0.99 Increments of 0.01
Operate delay 0.00 s to 60.00 s Increments of 0.01 s
Dropout delay 0.00 s to 60.00 s Increments of 0.01 s
Setting Values for Stage Type Inverse Time-Overcurrent Protection (IEC/ANSI)
Type of characteristic curve
Characteristic curves according to IEC and ANSI
Dropout Disk emulation
Instantaneous
–
Time multiplier 0.00 to 15.00 Increments of 0.01
Minimum time of the curve 0.00 to 1.00 s Increments of 0.01 s
Additional time delay 0.00 to 60.00 s Increments of 0.01 s
Dropout Values for Stage Type Inverse Time-Overcurrent Protection (IEC/ANSI)
Disk emulation
Approx. 0.90 * threshold value
Instantaneous Approx. 1.05 * threshold value
Approx. 0.95 * pickup value
Characteristic Curves for Stage Type Inverse Time-Overcurrent Protection (IEC/ANSI)
Standard Characteristic Curves According to IEC
Normal inverse: type A
Refer to the respective picture of the technical data for the non-
dir-OC-ground function 11.9.2 Stage with Inverse-Time Charac-
teristic Curve
Very inverse: type B
Extremely inverse: type C
Long-time inverse
Standard Characteristic Curves According to ANSI/IEEE
11.11
Technical Data
11.11 Directional Time-Overcurrent Protection, Ground
1136 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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