Overvoltage Protection With Positive-Sequence Voltage; Overvoltage Protection With Negative-Sequence Voltage - Siemens SIPROTEC 5 7SS85 Technical Data Manual

Technical Data
11.19 Voltage Protection
Tolerances for Stage Type Inverse-Time Overvoltage Protection
Voltages
Operate time for
1.2 ≤ V/V threshold value ≤ 20
Reset time delay

Overvoltage Protection with Positive-Sequence Voltage

11.19.2
Setting Values
Pickup 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, typical
Operate time with time delay = 0 ms, maximum
Dropout time, typical
Dropout time, maximum
Frequency Operating Range
0.9 ≤ f/f ≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f < f ≤ 90 Hz
rated
f < 10 Hz
f > 90 Hz
Tolerances
Voltages
Time delays

Overvoltage Protection with Negative-Sequence Voltage

11.19.3
Setting Values for the Function
Measuring window
51 OOT (Output Operating Time): additional delay of the output medium used, see Chapter
958
rated
0.5 % of the setting value or 0.05 V
5 % of the setting value or 30 ms
1 % of the setting value or 10 ms
0.300 V to 200.000 V
0.00 s to 60.00 s
0.90 to 0.99
150 mV sec.
51
Approx. 25 ms + OOT at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Approx. 30 ms + OOT at 50 Hz
Approx. 26 ms + OOT at 60 Hz
Approx. 25 ms + OOT
Approx. 30 ms + OOT
According to specified tolerances
Slightly expanded tolerances
Active
0.5 % of the setting value or 0.05 V
1 % of the setting value or 10 ms
1 cycle to 10 cycles
11.1.4 Relay Outputs
SIPROTEC 5, Low-Impedance Busbar Protection, Manual
C53000-G5040-C019-C, Edition 04.2021
Increments of 0.001 V
Increments of 0.01 s
Increments of 0.01
Increments of 1 cycle