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

11.19

Overvoltage Protection with Any Voltage

Setting Values
Measured value
Method of measurement
Pickup value 74
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
73 If the function Overvoltage protection with any voltage is used in a 1-phase function group, the measured-value parameter is not
visible.
74 If you have selected the method of measurement = RMS value, do not set the threshold value under 10 V.
75 OOT (Output Operating Time): additional delay of the output medium used, see Chapter
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018
Measured phase-to-ground voltage V
73
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
Measured phase-to-phase voltage V
Measured phase-to-phase voltage V
Measured phase-to-phase voltage V
Calculated voltage V0
Fundamental component
RMS value
0.300 V to 340.000 V
0.00 s to 60.00 s
0.90 to 0.99
rated
11.19 Overvoltage Protection with Any Voltage
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.
Approx. 25 ms + OOT 75 at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Approx. 20 ms + OOT
According to specified tolerances
Slightly expanded tolerances
Active
0.5 % of the setting value or 0.05 V
11.1.4 Relay Outputs
Technical Data
1171