Siemens 6MD85, Manual

Page: 1160 / 1256

Underfrequency Protection
Setting Values
Pickup values f< 40.00 Hz to 70.00 Hz Increments of 0.01 Hz
Dropout differential 20 mHz to 2 000 mHz Increments of 10 mHz
Time delay T 0.00 s to 600.00 s Increments of 0.01 s
Minimum voltage 3.000 V to 175.000 V Increments of 0.001 V
Times
Pickup times f< Angle difference method
50 Hz
60 Hz
Approx. 70 ms + OOT 80
Approx. 60 ms + OOT
Filtering method
50 Hz
60 Hz
Approx. 65 ms + OOT
Approx. 54 ms + OOT
Dropout times f< 60 ms to 80 ms
Dropout
Frequency Parameterizable dropout differential
Minimum voltage
The larger dropout differential (=
| pickup value – dropout threshold |
) of the following
2 criteria is used:
Dropout differential derived from
Dropout ratio
105 % for the Minimum voltage parameter
Minimum absolute dropout differential 150 mV secondary
Operating Ranges
Voltage range 5 V to 230 V (phase-phase)
Frequency range Angle difference method 10 Hz to 80 Hz
Filtering method
25 Hz to 80 Hz
Tolerances
Frequency f<
f
rated
- 0.20 Hz < f < f
rated
+ 0.20 Hz ± 5 mHz at V = V
rated
f
rated
- 3.0 Hz < f < f
rated
+ 3.0 Hz ± 10 mHz at V = V
rated
Time delay T(f<) 1 % of the setting value or 10 ms
Minimum voltage 1 % of the setting value or 0.5 V
11.23
80 OOT (Output Operating Time): Additional delay of the output medium used, for example, 5 ms with fast relays, see chapter
11.1.4 Relay Outputs
Technical Data
11.23 Underfrequency Protection
1160 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017