Rate of Frequency Change Protection
Setting Values for the Function
Minimum voltage
3.000 V to 175.000 V
Increments of 0.001 V
Measuring window
2 periods to 5 periods
Increments of 1 period
Setting Values for Stage Types
Threshold
0.100 Hz/s to 20.000 Hz/s
Increments of 0.025 Hz/s
Dropout differential
0.02 Hz/s to 0.99 Hz/s
Increments of 0.01 Hz/s
Operate delay
0.00 s to 60.00 s
Increments of 0.01 s
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
Times
Pickup time
Approx. 160 ms + OOT
82
to 220 ms + OOT (depends on measuring
window length)
at 50 Hz
Approx. 140 ms + OOT to 200 ms + OOT (depends on measuring
window length)
at 60 Hz
Dropout time
Approx. 160 ms + OOT to 220 ms + OOT (depends on measuring
window length)
at 50 Hz
Approx. 140 ms + OOT to 200 ms + OOT (depends on measuring
window length)
at 60 Hz
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1
According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Inactive
Tolerances
Threshold,
measuring window > 3 periods
Approx. 3 % or 0.060 Hz/s
Threshold,
measuring window ≤ 3 periods
Approx. 5 % or 0.060 Hz/s
11.25
82
OOT (Output Operating Time): Additional delay of the output medium used, for example, 5 ms with fast relays, see chapter
Technical Data
11.25 Rate of Frequency Change Protection
SIPROTEC 5, High-Voltage Bay Controller, Manual
1163
C53000-G5040-C015-9, Edition 11.2017
Summary of Contents for 6MD85
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