Undervoltage Protection With 3-Phase Voltage - Siemens Siprotec 5 7SS85 Techical Data

Technical Data

11.24 Undervoltage Protection with 3-Phase Voltage

11.24 Undervoltage Protection with 3-Phase Voltage
Setting Values for Stage Type Definite Time-Undervoltage Protection
Measured value
Method of measurement
Current-flow criterion
Pickup value 35
Time delay
Dropout ratio
Setting Values for Stage Type Inverse Time-Undervoltage Protection
Measured value
Method of measurement
Pickup value
Pickup factor
Characteristic constant k
Characteristic constan α
Characteristic constant c
Time multiplier
Additional time delay
Reset time
Operate Curve
T =T + T
op Inv add
Where:
T
op
T
Inv
T
add
[fo_UVP3ph_1_3pol_inverse, 1, en_US]
Where
T
Inv
T
p
V
V
Thresh
k
35 If you have selected the Method of measurement = RMS value, do not set the threshold value to less than 10 V.
604
Phase-to-phase
Phase-to-ground
Fundamental component
RMS value
On
Off
0.300 V to 175.000 V
0.00 s to 60.00 s
1.01 to 1.20
Phase-to-phase
Phase-to-ground
Fundamental component
RMS value
0.300 V to 175.000 V
0.80 to 1.00
0.00 to 300.00
0.010 to 5.000
0.000 to 5.000
0.05 to 15.00
0.00 s to 60.00 s
0.00 s to 60.00 s
Operate delay
Inverse-time delay
Additional time delay (Parameter Additional time delay)
Inverse-time delay
Time multiplier (Parameter Time dial)
Measured undervoltage
Threshold value (Parameter Threshold)
Curve constant k (Parameter Charact. constant k)
Increments of 0.001 V
Increments of 0.01 s
Increments of 0.01
Increments of 0.001 V
Increments of 0.01
Increments of 0.01
Increments of 0.001
Increments of 0.001
Increments of 0.01
Increments of 0.01 s
Increments of 0.01 s
SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual
C53000-G5040-C019-6, Edition 06.2016