Directional Time-Overcurrent Protection, Phases
Setting Values for the Function
Rotation angle of the reference
voltage
-180
o
to +180
o
Increments of 1
o
Setting Values for All Stage Types
Directional mode Forward
Backward
–
Method of measurement Fundamental component
RMS value
–
Threshold value
62
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 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Setting Values for the Definite Time-Overcurrent Protection Stage Type
Dropout ratio 0.90 to 0.99 Increments of 0.01
Time 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 the IEC/ANSI Characteristic Curve Stage Type (Inverse-Time)
Type of characteristic curve
Characteristic curves according to IEC (see Table 11-3) and ANSI
(see Table 11-4)
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 Ratio for the IEC/ANSI Characteristic Curve Stage Type (Inverse-Time)
Disk emulation
Approx. 0.90 * threshold value
Time multiplier Approx. 1.05 * threshold value
Approx. 0.95 * pickup value
Setting Values for Stage Type with User-Defined Characteristic Curve (Inverse Time)
Time multiplier
0.05 to 15.00 Increments of 0.01
Number of value pairs for the operate
characteristic curve
2 to 30 Increments of 1
X values of the operate curve 1.00 to 66.67 p. u. Increments of 0.01 p.u.
Y values of the operate curve 0.00 s to 999.00 s Increments of 0.01 s
Number of value pairs for the dropout
characteristic curve
2 to 30 Increments of 1
X values of the dropout characteristic
curve
0.05 to 0.95 p. u. Increments of 0.01 p.u.
11.10
62
If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
rated,sec
.
Technical Data
11.10 Directional Time-Overcurrent Protection, Phases
SIPROTEC 5, High-Voltage Bay Controller, Manual 1133
C53000-G5040-C015-9, Edition 11.2017
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