Undervoltage Protection With Any Voltage - Siemens SIPROTEC 5 Technical Data Manual

Technical Data

11.21 Undervoltage Protection with Any Voltage

11.21 Undervoltage Protection with Any Voltage
Setting Values
Measured value
Method of measurement
Threshold value
Time delay
Dropout ratio
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for the overvoltage and of 105 % for the
undervoltage functionality.
Minimum absolute dropout differential
Times
Operate time with time delay = 0 ms
Dropout time
Frequency Operating Range
0.9 ≤ f/f ≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f < f ≤ 80 Hz
rated
f < 10 Hz
f > 80 Hz
Tolerances
Voltages
Time delays
78 If you have selected the method of measurement = RMS value, do not set the threshold value under 10 V.
79 OOT (Output Operating Time): additional delay of the output medium used, see chapter
1176
Measured phase-to-ground voltage V
Measured phase-to-ground voltage V
Measured phase-to-ground voltage V
Measured phase-to-phase voltage V
Measured phase-to-phase voltage V
Measured phase-to-phase voltage V
Calculated phase-to-phase voltage V
Calculated phase-to-phase voltage V
Calculated phase-to-phase voltage V
Calculated voltage V0
Fundamental component
RMS value
0.300 V to 340.000 V
78
0.00 s to 60.00 s
1.01 to 1.20
Approx. 25 ms + OOT
Approx. 22 ms + OOT at 60 Hz
Approx. 20 ms + OOT
According to specified tolerances
Slightly expanded tolerances
rated
Inactive, maintained;
Dropout of the pickup induced by blocking or by increasing the
measurand beyond the dropout threshold
0.5 % of the setting value or 0.05 V
1 % of the setting value or 10 ms
A
B
C
AB
BC
CA
AB
BC
CA
Increments of 0.001 V
Increments of 0.01 s
Increments of 0.01
150 mV sec.
79 at 50 Hz
11.1.4 Relay Outputs
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018