Overvoltage Protection with 3-Phase Voltage
Setting Values for Stage Type Definite Time-Overvoltage Protection
Measured value Phase-to-phase
Phase-to-ground
Method of measurement Fundamental component
RMS value
Pickup mode 1 out of 3
3 out of 3
Pickup value
27
0.300 V to 340.000 V Increments of 0.001 V
Time delay 0.00 s to 300.00 s Increments of 0.01 s
Dropout ratio 0.90 to 0.99 Increments of 0.01
Setting Values for Stage Type Inverse Time-Overvoltage Protection
Measured value Phase-to-phase
Phase-to-ground
Method of measurement Fundamental component
RMS value
Pickup mode 1 out of 3
3 out of 3
Pickup value 0.300 V to 340.000 V Increments of 0.001 V
Pickup factor 1.00 to 1.20 Increments of 0.01
Characteristic constant k 0.00 to 300.00 Increments of 0.01
Characteristic constant α
0.010 to 5.000 Increments of 0.001
Characteristic constant c 0.000 to 5.000 Increments of 0.001
Time multiplier 0.05 to 15.00 Increments of 0.01
Additional time delay 0.00 s to 60.00 s Increments of 0.01 s
Reset time 0.00 s to 60.00 s Increments of 0.01 s
Operate Curve for Stage Type Inverse Time-Overvoltage Protection
Where
T
op
Operate delay
T
inv
Inverse-time delay
T
add
Additional time delay (parameter Additional time delay)
Where
T
inv
Inverse-time delay
T
p
Time multiplier (parameter Time dial)
V Measured voltage
11.19
27
If you have selected the method of measurement = RMS value, do not set the threshold value under 10 V.
Technical Data
11.19 Overvoltage Protection with 3-Phase Voltage
598 SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual
C53000-G5040-C019-6, Edition 06.2016
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