Tolerances
Voltages
0.5 % of the setting value or 0.05 V
Time delays
1 % of the setting value or 10 ms
Undervoltage Protection with 3-Phase Voltage
Setting Values for Stage Type Definite Time-Undervoltage Protection
Measured value
Phase-to-phase
Phase-to-ground
Method of measurement
Fundamental component
RMS value
Current-flow criterion
On
Off
Threshold value I>
1 A @ 50 and 100 Irated
0.030 A to 10.000 A
Increments of 0.001 A
5 A @ 50 and 100 Irated
0.15 A to 50.00 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
Threshold value
64
0.300 V to 175.000 V
Increments of 0.001 V
Time delay
0.00 s to 60.00 s
Increments of 0.01 s
Dropout ratio
1.01 to 1.20
Increments of 0.01
Setting Values for Stage Type Inverse Time-Undervoltage Protection
Measured value
Phase-to-phase
Phase-to-ground
Method of measurement
Fundamental component
RMS value
Current-flow criterion
On
Off
Threshold value I>
1 A @ 50 and 100 Irated
0.030 A to 10.000 A
Increments of 0.001 A
5 A @ 50 and 100 Irated
0.15 A to 50.00 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
Threshold value
0.300 V to 175.000 V
Increments of 0.001 V
Pickup factor
0.80 to 1.00
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
T
op
=T
Inv
+ T
add
Where:
T
op
Operate delay
12.10.6
64
If you have selected the Method of measurement = RMS value, do not set the threshold value to less than 10 V.
Technical Data
12.10 Voltage Protection
SIPROTEC 5, Merging Unit 6MU85, Manual
839
C53000-G5040-C074-1, Edition 01.2020